Airworthiness Directives; General Electric Company CF34-1A, -3A, -3A1, -3A2, -3B, and -3B1 Turbofan Engines, 910-915 [E9-30471]
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910
Federal Register / Vol. 75, No. 4 / Thursday, January 7, 2010 / Rules and Regulations
required by this AD, unless the AD specifies
otherwise.
(1) The Director of the Federal Register
approved the incorporation by reference of
Section 9, Revision April 2008, of the Boeing
747–400 Maintenance Planning Data (MPD)
Document D62U400–9; and Section 9,
Revision March 2009, of the Boeing 747–400
Maintenance Planning Data (MPD)
Document, D621U400–9; under 5 U.S.C.
522(a) and 1 CFR part 51.
(2) The Director of the Federal Register
previously approved the incorporation by
reference of Boeing Temporary Revision 09–
010, dated March 2008, to the Boeing 747–
400 MPD Document D621U400–9, on June
12, 2008 (73 FR 25990, May 8, 2008).
(3) For service information identified in
this AD, contact Boeing Commercial
Airplanes, Attention: Data & Services
Management, P.O. Box 3707, MC 2H–65,
Seattle, Washington 98124–2207; telephone
206–544–5000, extension 1; fax 206–766–
5680; e-mail me.boecom@boeing.com;
Internet https://www.myboeingfleet.com.
(4) You may review copies of the service
information at the FAA, Transport Airplane
Directorate, 1601 Lind Avenue, SW., Renton,
Washington. For information on the
availability of this material at the FAA, call
425–227–1221 or 425–227–1152.
(5) You may also review copies of the
service information that is incorporated by
reference at the National Archives and
Records Administration (NARA). For
information on the availability of this
material at NARA, call 202–741–6030, or go
to: https://www.archives.gov/federal_register/
code_of_federal_regulations/
ibr_locations.html.
Issued in Renton, Washington, on
December 21, 2009.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E9–31070 Filed 1–6–10; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2007–27687; Directorate
Identifier 2000–NE–42–AD; Amendment 39–
16144; AD 2009–26–09]
RIN 2120–AA64
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Airworthiness Directives; General
Electric Company CF34–1A, –3A, –3A1,
–3A2, –3B, and –3B1 Turbofan Engines
AGENCY: Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
SUMMARY: The FAA is superseding an
existing airworthiness directive (AD) for
General Electric Company (GE) CF34–
1A, –3A, –3A1, –3A2, –3B, and –3B1
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15:23 Jan 06, 2010
Jkt 220001
turbofan engines. That AD currently
requires a onetime visual and tactile
inspection of certain areas of certain
P/N and SN fan disks for an arc-out
defect, within 20 engine flight hours
after the effective date of that AD. This
AD requires inspecting certain fan disks
for electrical arc-out indications,
removing from service fan disks with
electrical arc-out indications,
performing tactile and enhanced visual
(TEV) inspections, fluorescent penetrant
inspections (FPI), and eddy current
inspections (ECI) on certain disks that
have already had a shop-level
inspection, and repetitive FPI and ECI
on certain fan disks. This AD results
from an updated risk analysis by GE that
shows we need to take corrective action
that is more stringent. We are issuing
this AD to prevent an uncontained
failure of the fan disk, which could
result in damage to the airplane.
DATES: This AD becomes effective
February 11, 2010. The Director of the
Federal Register approved the
incorporation by reference of certain
publications listed in the regulations as
of February 11, 2010.
ADDRESSES: You can get the service
information identified in this AD from
General Electric Company via Lockheed
Martin Technology Services, 10525
Chester Road, Suite C, Cincinnati, Ohio
45215; telephone (513) 672–8400; fax
(513) 672–8422.
The Docket Operations office is
located at Docket Management Facility,
U.S. Department of Transportation, 1200
New Jersey Avenue, SE., West Building
Ground Floor, Room W12–140,
Washington, DC 20590–0001.
FOR FURTHER INFORMATION CONTACT: Tara
Chaidez, Aerospace Engineer, Engine
Certification Office, FAA, Engine and
Propeller Directorate, 12 New England
Executive Park, Burlington, MA 01803;
e-mail: tara.chaidez@faa.gov; telephone
(781) 238–7773; fax (781) 238–7199.
SUPPLEMENTARY INFORMATION: The FAA
proposed to amend 14 CFR part 39 by
superseding AD 2007–07–07R1,
Amendment 39–15179 (72 FR 49183,
August 28, 2007) and AD 2007–05–16,
Amendment 39–14977 (72 FR 10054,
March 7, 2007), with a proposed AD.
The proposed AD applies to GE CF34–
1A, –3A, –3A1, –3A2, –3B, and –3B1
turbofan engines. We published the
proposed AD in the Federal Register on
April 17, 2009 (74 FR 17799). That
action proposed to require:
• Replacing certain fan disks installed
on regional jets within 15 days after the
effective date of the proposed AD, and
• On-wing and shop-level inspections
of fan disks for electrical arc-out defects
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Sfmt 4700
on fan disks installed on regional jets,
and
• Shop-level inspections of fan disks
for electrical arc-out defects on fan disks
installed on business jets.
Examining the AD Docket
You may examine the AD docket on
the Internet at https://
www.regulations.gov; or in person at the
Docket Operations office between 9 a.m.
and 5 p.m., Monday through Friday,
except Federal holidays. The AD docket
contains this AD, the regulatory
evaluation, any comments received, and
other information. The street address for
the Docket Operations office (telephone
(800) 647–5527) is provided in the
ADDRESSES section. Comments will be
available in the AD docket shortly after
receipt.
Comments
We provided the public the
opportunity to participate in the
development of this AD. We have
considered the comments received.
Request To Change the Compliance
Requirements for Previously Inspected
CF34–3B Tier 3 Disks
Two commenters, GE and Bombardier
Flex, ask us to change the compliance
requirements for previously inspected
CF34–B tier 3 disks from ‘‘within 3,500
cycles-since-last inspection (CSLI), but
no later than March 19, 2012’’ to ‘‘at the
next shop visit.’’ The commenters state
that requiring ‘‘within 3,500 CSLI, but
no later than March 19, 2012,’’ make the
requirements more conservative than
the tier 1 and tier 2 disk reinspection
programs.
We agree. We have changed paragraph
(m)(2) of this AD from ‘‘within 3,500
CSLI, but no later than March 19, 2012’’
to ‘‘at the next shop visit.’’
Request To Include Table 2 of GE ASB
CF34–BJ S/B 72–A0212, Revision 04,
dated October 27, 2008
One commenter asks us to include
Table 2 of GE ASB CF34–BJ S/B 72–
A0212, Revision 04, dated October 27,
2008, in the AD. The commenter states
that many owners, lessors, or their
respective representatives are routinely
denied access to the manufacturer’s
Web site where the referenced SBs are
archived. The commenter states that this
makes it very difficult, if not impossible,
to evaluate and schedule compliance
with this AD.
We don’t agree. If operators and
others who need the service information
can’t get the service information from
the manufacturer, they can contact the
individual or office identified in
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Federal Register / Vol. 75, No. 4 / Thursday, January 7, 2010 / Rules and Regulations
paragraph (p) of this AD. We didn’t
change the AD.
Request To Allow an Alternative
Method of Compliance (AMOC) for the
Inspection Requirements of This AD
One commenter, Air Wisconsin, asks
us to allow using the inspections
specified in 72–21–00, Inspection, as
specified in AD 2002–05–02. The
commenter states that this is the same
requirement as specified in the
accomplishment instructions of the
proposed AD.
We disagree. AD 2002–05–02 requires
adding the specified inspections to the
airworthiness limitation section of the
engine manual and to the operators
approved maintenance program. We do
agree that actions performed under one
AD may result in credit for actions
performed in another AD. We didn’t
change this AD.
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Request To Add a Drawdown to
Paragraph (g) of the Proposed AD
The same commenter asks us to
change paragraph (g) of the proposed
AD from ‘‘within 8,000 CSN’’ to ‘‘before
accumulating 8,000 CSN or within 15
days after the effective date of this AD,
whichever is later.’’ Paragraph (g)
currently requires replacing the disks
before accumulating 8,000 CSN. The
commenter stated that he would like the
same 15-day allowance that we
provided in paragraph (f) for parts that
have close to 8,000 CSN on the effective
date of this AD.
We don’t agree. The new life limit is
8,000 CSN on the effective date of this
AD. We removed the 15-day allowance
in paragraph (f) so that both groups use
the new life limit.
Request To Use SEI–756, 72–00–00,
Special Procedure 60
The same commenter requests that
eddy current inspections (ECIs)
performed using SEI–756, 72–21–00,
Special Procedure 60 or GE ASB CF34–
AL S/B 72–A0233, Revision 04, dated
October 27, 2008, be acceptable in
addition to GE ASB CF34–AL S/B 72A–
0252, Dated October 27, 2008. The
commenter states that paragraphs
(h)(1)(ii), (h)(2)(iii), (l)(1)(ii), and
(l)(2)(iii) all say ‘‘Use paragraph 3.A. of
the Accomplishment Instructions of GE
ASB CF34–AL S/B 72–A0252, dated
October 27, 2008, to perform the
repetitive ECI.’’
The instructions for performing the
repetitive ECI in GE ASB CF34–AL S/B
72–A0252, dated October 27, 2008, and
ASB CF34–AL S/B 72–A0233, Revision
04, dated October 27, 2008, refer to SEI–
756, 72–00–00, SPECIAL PROCEDURE
60—EDDY CURRENT INSPECTION
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(ECI) PROCEDURES AND
REQUIREMENTS OF CRITICAL
HARDWARE.’’
The commenter wants to be able to
track all the requirements to one service
bulletin or specific procedure instead of
several different service bulletins.
We don’t agree. The ECI referenced in
the three documents above are not the
same. The ASBs mandated by this AD
provide a more rigorous ECI. We didn’t
change the AD.
Request To Use a Single ASB for Each
Set of Engine Models
The same commenter requests that
TEV inspections, FPIs, and ECIs
performed using GE ASB CF34–AL S/B
72–A0233, Revision 04, dated October
27, 2008, be acceptable to meet the
requirements of GE ASB CF34–AL S/B
72A–0253, dated October 27, 2008. The
commenter wants to be able to track all
the requirements to one service bulletin
or specific procedure instead of several
different service bulletins. The
commenter notes that the instructions
for performing the ECI are the same in
all three documents.
We partially agree. The procedures for
performing the TEV inspection, the FPI,
and the ECI are the same in the two
ASBs referenced above. We changed
paragraphs (h)(1)(i), (i)(1)(i), (j)(1), and
(j)(2) of the proposed AD as follows:
• Paragraph (h)(1)(i) from ‘‘Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B
72–A0233, Revision 04, dated October
27, 2008, * * *’’ to ‘‘Use paragraph 3.A
of the Accomplishment Instructions of
GE ASB CF34–AL S/B 72–A0233,
Revision 04, dated October 27, 2008, or
use paragraph 3.A of the
Accomplishment Instructions of GE
ASB CF34–AL S/B 72–A0253, dated
October 27, 2008, * * *’’
• Paragraph (i)(1)(i) from ‘‘Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B
72–A0233, Revision 04, dated October
27, 2008, * * *’’ to ‘‘Use paragraph 3.A
of the Accomplishment Instructions of
GE ASB CF34–AL S/B 72–A0233,
Revision 04, dated October 27, 2008, or
use paragraph 3.A of the
Accomplishment Instructions of GE
ASB CF34–AL S/B 72–A0253, dated
October 27, 2008, * * *’’
• Paragraph (j)(1) from ‘‘Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B
72–A0233, Revision 04, dated October
27, 2008, * * *’’ to ‘‘Use paragraph 3.A
of the Accomplishment Instructions of
GE ASB CF34–AL S/B 72–A0233,
Revision 04, dated October 27, 2008, or
use paragraph 3.A of the
Accomplishment Instructions of GE
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911
ASB CF34–AL S/B 72–A0253, dated
October 27, 2008, * * *’’
• Paragraph (j)(2) from ‘‘Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B
72–A0233, Revision 04, dated October
27, 2008, * * *’’ to ‘‘Use paragraph 3.A
of the Accomplishment Instructions of
GE ASB CF34–AL S/B 72–A0233,
Revision 04, dated October 27, 2008, or
use paragraph 3.A of the
Accomplishment Instructions of GE
ASB CF34–AL S/B 72–A0253, dated
October 27, 2008, * * *’’
Since the accomplishment procedures
in GE ASB CF34–BJ S/B 72–A0212,
Revision 04, dated October 27, 2008,
and the procedures in GE ASB CF34–BJ
S/B 72–0234, dated October 27, 2008,
are also the same, we changed
paragraphs (k)(1)(i), (l)(1)(i), (m)(1), and
(m)(2) of the proposed AD as follows:
• Paragraph (k)(1)(i) from ‘‘Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B
72–A0212, Revision 04, dated October
27, 2008, * * *’’ to ‘‘Use paragraph 3.A
of the Accomplishment Instructions of
GE ASB CF34–AL S/B 72–A0212,
Revision 04, dated October 27, 2008, or
use paragraph 3.A of the
Accomplishment Instructions of GE
ASB CF34–AL S/B 72–A0234, dated
October 27, 2008, * * *’’
• Paragraph (l)(1)(i) from ‘‘Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B
72–A0212, Revision 04, dated October
27, 2008, * * *’’ to ‘‘Use paragraph 3.A
of the Accomplishment Instructions of
GE ASB CF34–AL S/B 72–A0212,
Revision 04, dated October 27, 2008, or
use paragraph 3.A of the
Accomplishment Instructions of GE
ASB CF34–AL S/B 72–A0234, dated
October 27, 2008, * * *’’
• Paragraph (m)(1) from ‘‘Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B
72–A0212, Revision 04, dated October
27, 2008, * * *’’ to ‘‘Use paragraph 3.A
of the Accomplishment Instructions of
GE ASB CF34–AL S/B 72–A0212,
Revision 04, dated October 27, 2008, or
use paragraph 3.A of the
Accomplishment Instructions of GE
ASB CF34–AL S/B 72–A0234, dated
October 27, 2008, * * *’’
• Paragraph (m)(2) from ‘‘Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B
72–A0212, Revision 04, dated October
27, 2008, * * *’’ to ‘‘Use paragraph 3.A
of the Accomplishment Instructions of
GE ASB CF34–BJ S/B 72–A0212,
Revision 04, dated October 27, 2008, or
use paragraph 3.A of the
Accomplishment Instructions of GE
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Federal Register / Vol. 75, No. 4 / Thursday, January 7, 2010 / Rules and Regulations
ASB CF34–BJ S/B 72–A0234, dated
October 27, 2008, * * *’’
Request To Change Paragraph (j)(2) of
the Proposed AD
The same commenter requests that we
preface paragraph (j)(2) of the proposed
AD with ‘‘Unless already done.’’ We
believe the commenter wants to avoid
having to perform the same inspection
more than once on a disk.
We don’t agree that the change is
needed. Paragraph (e) of the proposed
AD states, ‘‘You are responsible for
having the actions required by this AD
performed within the compliance times
specified unless the actions have
already been done.’’
Request To Correct a Typographical
Error in Paragraph (j)(1) of the
Proposed AD
Two commenters, GE and Air
Wisconsin, ask us to correct a
typographical error in paragraph (j)(1) of
the proposed AD. The commenters
inform us that the reference to GE ASB
CF34–AL S/B 72–A0253, Revision 4,
dated October 27, 2008, is not correct.
The commenters inform us that GE ASB
CF34–AL S/B 72–A0233, Revision 04,
dated October 27, 2008, is the correct
reference.
We agree. We have changed paragraph
(j)(1) of this AD from ‘‘GE ASB CF34–AL
S/B 72–A0253, Revision 4, dated
October 27, 2008’’ to ‘‘GE ASB CF34–AL
S/B 72–A0233, Revision 04, dated
October 27, 2008.’’
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Recommendation To Add Removal
Requirements to Paragraphs (h), (i), (k),
and (l) of the Proposed AD
One commenter, GE, recommends
adding an additional, repeat section to
paragraphs (h), (i), (k), and (l) of the
proposed AD. The commenter feels
adding the removal requirements to the
paragraphs will enhance clarity of the
AD.
We don’t agree. The mandatory
terminating actions are already specified
in paragraph (o) of the proposed AD and
don’t need to be repeated. We didn’t
change the AD.
Request To Correct an Engine Model
Reference in Paragraphs (k), (l), and
(m) of the Proposed AD
One commenter, GE, informs us that
paragraphs (k), (l), and (m) in the
proposed AD omit reference to the
CF34–3A1 application and that the fan
drive shaft life limit is incorrectly
applied to the CF34–1A application.
The commenter states that this is the
same requirement as specified in the
accomplishment instructions of the
proposed AD.
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We agree. We changed paragraphs (k),
(l), and (m) of the proposed AD from
‘‘For CF34–1A turbofan engines with fan
drive shaft, P/N 6036T78P02, and
airworthiness limitation section life
limit of 15,000 CSN, CF34–3A, CF34–
3A2, and CF34–3B turbofan engines
* * *’’ to ‘‘For CF34–3A1 turbofan
engines with fan drive shaft, P/N
6036T78P02, and airworthiness
limitation section life limit of 15,000
CSN, CF34–1A, CF34–3A, CF34–3A2,
and CF34–3B turbofan engines * * *’’
Request To Reference to FPI and ECI in
Paragraphs (k)(1)(i) of the Proposed AD
The same commenter asks us to
change paragraphs (k)(1)(i) to add a
reference to the FPI and ECI. The
commenter states that the paragraph
currently requires TEV inspection, FPI,
and ECI, but the last sentence says only
‘‘to perform the TEV inspection.’’ The
commenter feels the paragraph will be
more clear by saying ‘‘To perform the
TEV inspection, FPI, and ECI.’’
We agree. We changed paragraph
(k)(1)(i) of the proposed AD from ‘‘Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B
72–A0212, Revision 04, dated October
27, 2008, or use paragraph 3.A of the
Accomplishment Instructions of GE
ASB CF34–AL S/B 72–A0234, dated
October 27, 2008, to perform the TEV
inspection’’ to ‘‘Use paragraph 3.A of the
Accomplishment Instructions of GE
ASB CF34–AL S/B 72–A0212, Revision
04, dated October 27, 2008, or use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B
72–A0234, dated October 27, 2008, to
perform the TEV inspection, FPI, and
ECI.’’
Request To Correct a Typographical
Error in Paragraphs (l)(1)(i) of the
Proposed AD
The same commenter asks us to
correct the typographical error of ‘‘CIS’’
in paragraph (l)(1)(i) to ‘‘CSN’’. The
commenter states that the paragraph
should be changed to be consistent with
the risk assessment.
We agree. We changed paragraph
(l)(1)(i) of the proposed AD from ‘‘or
within 3,500 CIS after September 12,
2007,’’ to ‘‘or within 3,500 CSN after
September 12, 2007,’’.
Request To Change Paragraphs (h), (i),
(j), (k), (l), and (m) of the Proposed AD
to Specify RJ and BJ Model Engines
The same commenter asks us to revise
paragraphs (h), (i), (j), (l), and (m) to
clarify the instructions related to
operators who fly a regional jet (RJ) with
the CF34–3A1 engine as a business jet
(BJ) application. The commenter states
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that GE ASBs CF34–AL S/B 72–A0233,
Revision 04, dated October 27, 2008;
CF34–AL S/B 72–A0252, dated October
27, 2008; CF34–AL S/B 72–A0253,
dated October 27, 2008; apply to both RJ
operators and also to a small number of
BJ operators who fly under the RJ
manual. These BJ applications may
include both CF34–3B1 and CF34–3A1
models. The proposed AD distinguishes
between RJ and BJ applications based on
engine model, and in the case of the
CF34–3A1 model, the life limit of the
fan drive shaft, P/N 6036T78P02.
Modifying the proposed AD to identify
the applications as RJ and BJ, and
defining the RJ and BJ designations,
would more clearly identify affected
populations and still meet the FAA’s
purpose in issuing ADs.
We don’t agree. The CF34–1A is used
on both the RJ airplane and the BJ
airplane. The engine is modified by
service bulletins to allow it to be used
on one configuration or the other. There
is nothing to prevent an engine that was
installed on a BJ airplane from being
modified and installed on an RJ
airplane: By designating the inspection
criteria based on the life limit of the fan
drive shaft, we are making the
regulatory requirements of the proposed
AD specific to the engine configuration
instead of the operational configuration.
We didn’t change the proposed AD.
Conclusion
We have carefully reviewed the
available data, including the comments
received, and determined that air safety
and the public interest require adopting
the AD with the changes described
previously. We have determined that
these changes will neither increase the
economic burden on any operator nor
increase the scope of the AD.
Costs of Compliance
We estimate that this AD will affect
18 engines installed on airplanes of U.S.
registry. We also estimate that it would
take about 2 work-hours per engine to
perform the required actions, and that
the average labor rate is $80 per workhour. No parts are required, so parts
would cost about $0. Based on these
figures, we estimate the total cost of the
AD to U.S. operators to be $2,880.
Authority for This Rulemaking
Title 49 of the United States Code
specifies the FAA’s authority to issue
rules on aviation safety. Subtitle I,
Section 106, describes the authority of
the FAA Administrator. Subtitle VII,
Aviation Programs, describes in more
detail the scope of the Agency’s
authority.
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Federal Register / Vol. 75, No. 4 / Thursday, January 7, 2010 / Rules and Regulations
We are issuing this rulemaking under
the authority described in Subtitle VII,
Part A, Subpart III, Section 44701,
‘‘General requirements.’’ Under that
section, Congress charges the FAA with
promoting safe flight of civil aircraft in
air commerce by prescribing regulations
for practices, methods, and procedures
the Administrator finds necessary for
safety in air commerce. This regulation
is within the scope of that authority
because it addresses an unsafe condition
that is likely to exist or develop on
products identified in this rulemaking
action.
Regulatory Findings
We have determined that this AD will
not have federalism implications under
Executive Order 13132. This AD will
not have a substantial direct effect on
the States, on the relationship between
the national government and the States,
or on the distribution of power and
responsibilities among the various
levels of government.
For the reasons discussed above, I
certify that this AD:
(1) Is not a ‘‘significant regulatory
action’’ under Executive Order 12866;
(2) Is not a ‘‘significant rule’’ under
DOT Regulatory Policies and Procedures
(44 FR 11034, February 26, 1979); and
(3) Will not have a significant
economic impact, positive or negative,
on a substantial number of small entities
under the criteria of the Regulatory
Flexibility Act.
We prepared a summary of the costs
to comply with this AD and placed it in
the AD Docket. You may get a copy of
this summary at the address listed
under ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Incorporation by reference,
Safety.
Adoption of the Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the Federal Aviation Administration
amends 14 CFR part 39 as follows:
PART 39—AIRWORTHINESS
DIRECTIVES
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1. The authority citation for part 39
continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13
[Amended]
2. The FAA amends § 39.13 by
removing Amendment 39–15179 (72 FR
49183, August 28, 2007), and by adding
a new airworthiness directive,
Amendment 39–16144, to read as
follows:
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15:23 Jan 06, 2010
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2009–26–09 General Electric Company:
Amendment 39–16144. Docket No.
FAA–2007–27687; Directorate Identifier
2000–NE–42–AD.
Effective Date
(a) This airworthiness directive (AD)
becomes effective February 11, 2010.
Affected ADs
(b) This AD supersedes AD 2007–05–16,
Amendment 39–14977 and AD 2007–07–
07R1, Amendment 39–15179.
Applicability
(c) This AD applies to General Electric
Company (GE) CF34–1A, –3A, –3A1, –3A2,
–3B, and –3B1 turbofan engines, with fan
disks part numbers (P/Ns) 5921T18G01,
5921T18G09, 5921T18G10, 5921T54G01,
5922T01G02, 5922T01G04, 5922T01G05,
6020T62G04, 6020T62G05, 6078T00G01,
6078T57G01, 6078T57G02, 6078T57G03,
6078T57G04, 6078T57G05, and 6078T57G06
installed. These engines are installed on, but
not limited to, Bombardier Canadair airplane
models CL–600–2A12, –2B16, and –2B19.
Unsafe Condition
(d) This AD results from an updated risk
analysis by GE that shows we need to take
corrective action that is more stringent. We
are issuing this AD to prevent an
uncontained failure of the fan disk, which
could result in damage to the airplane.
Compliance
(e) You are responsible for having the
actions required by this AD performed within
the compliance times specified unless the
actions have already been done.
Removing Certain Fan Disks From Service
(f) For fan disks listed by P/N and serial
number (SN) in Table 2 of GE Alert Service
Bulletin (ASB) CF34–BJ S/B 72–A0212,
Revision 04, dated October 27, 2008; or in
Table 2 of GE ASB CF34–AL S/B 72–A0233,
Revision 04, dated October 27, 2008, that
have 8,000 CSN or more on the effective date
of this AD, remove fan disks from service.
(g) For fan disks listed by P/N and serial
number (SN) in Table 2 of GE Alert Service
Bulletin (ASB) CF34–BJ S/B 72–A0212,
Revision 04, dated October 27, 2008; or in
Table 2 of GE ASB CF34–AL S/B 72–A0233,
Revision 04, dated October 27, 2008, that
have fewer than 8,000 CSN on the effective
date of this AD, remove fan disks from
service before accumulating 8,000 CSN.
Inspections of Tier 1 Fan Disks
(h) For CF34–3A1 engines with fan drive
shaft, P/N 6036T78P02, and airworthiness
limitation section life limit of 22,000 CSN,
and CF34–3B1 turbofan engines with Tier 1
fan disks listed by P/N, SN, and Tier in Table
1 of GE ASB CF34–AL S/B 72–A0233,
Revision 04, dated October 27, 2008, do the
following:
Tactile and Enhanced Visual (TEV)
Inspections, Fluorescent Penetrant
Inspections (FPI), and Eddy Current
Inspections (ECI)
(1) For Tier 1 fan disks not already
inspected using GE ASB CF34–AL S/B 72–
PO 00000
Frm 00027
Fmt 4700
Sfmt 4700
913
A0233, Revision 03, dated June 27, 2007, or
earlier issue, do the following:
(i) Perform a TEV inspection, an FPI, and
an ECI on the Tier 1 fan disks within 650
cycles-in-service (CIS) after the effective date
of this AD. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–AL S/B 72–A0233, Revision 04, dated
October 27, 2008, or use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–AL S/B 72–A0253, dated October 27,
2008, to perform the TEV inspection, FPI,
and ECI.
(ii) Thereafter, perform repetitive ECI on
the Tier 1 fan disks within intervals of 3,000
cycles-since-last inspection (CSLI). Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B 72–
A0252, dated October 27, 2008, to perform
the repetitive ECI.
(2) For Tier 1 fan disks, listed by P/N, SN,
and Tier in Table 1 of GE ASB CF34–AL
S/B 72–A0233, Revision 04, dated October
27, 2008; already inspected using GE ASB
CF34–AL S/B 72–A0233, Revision 03, dated
June 27, 2007, or earlier issue, do the
following:
(i) For Tier 1 fan disks with 2,500 or more
CSLI on the effective date of this AD, perform
an ECI on the Tier 1 fan disks within 500 CIS
after the effective date of this AD. Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B 72–
A0252, dated October 27, 2008, to perform
the ECI.
(ii) For Tier 1 fan disks with fewer than
2,500 CSLI on the effective date of this AD,
perform an ECI on the Tier 1 fan disks within
3,000 CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–AL S/B 72–A0252, dated October 27,
2008, to perform the ECI.
(iii) Thereafter, perform repetitive ECI on
the Tier 1 fan disks within intervals of 3,000
CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–AL S/B 72–A0252, dated October 27,
2008, to perform the repetitive ECI.
Inspections of Tier 2 Fan Disks
(i) For CF34–3A1 engines with fan drive
shaft, P/N 6036T78P02, and airworthiness
limitation section life limit of 22,000 CSN,
and CF34–3B1 turbofan engines with Tier 2
fan disks listed by P/N, SN, and Tier in Table
1 of GE ASB CF34–AL S/B 72–A0233,
Revision 04, dated October 27, 2008, do the
following:
TEV Inspections, FPI, and ECI
(1) For Tier 2 fan disks not already
inspected using GE ASB CF34–AL S/B 72–
A0233, Revision 03, dated June 27, 2007, or
earlier issue, do the following:
(i) Perform a TEV inspection, an FPI, and
an ECI on the Tier 2 fan disks within 2,000
CIS after the effective date of this AD, or
within 5,000 CIS after September 12, 2007, or
by March 19, 2012, whichever occurs first.
Use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B 72–
A0233, Revision 04, dated October 27, 2008,
or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B 72–
A0253, dated October 27, 2008, to perform
the TEV inspection, FPI, and ECI.
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(ii) Thereafter, perform repetitive eddy
current inspections on the Tier 2 fan disks
within intervals of 3,000 CSLI. Use paragraph
3.A of the Accomplishment Instructions of
GE ASB CF34–AL S/B 72–A0252, dated
October 27, 2008, to perform the repetitive
ECI.
(2) For Tier 2 fan disks, listed by P/N, SN,
and Tier in Table 1 of GE ASB CF34–AL
S/B 72–A0233, Revision 04, dated October
27, 2008; already inspected using GE ASB
CF34–AL S/B 72–A0233, Revision 03, dated
June 27, 2007, or earlier issue, do the
following:
(i) For Tier 2 fan disks with 2,500 or more
CSLI on the effective date of this AD, perform
an ECI on the Tier 2 fan disks within 500 CIS
after the effective date of this AD. Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B 72–
A0252, dated October 27, 2008, to perform
the ECI.
(ii) For Tier 2 fan disks with fewer than
2,500 CSLI on the effective date of this AD,
perform an ECI on the Tier 2 fan disks within
3,000 CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–AL S/B 72–A0252, dated October 27,
2008, to perform the ECI.
(iii) Thereafter, perform repetitive ECI on
the Tier 2 fan disks within intervals of 3,000
CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–AL S/B 72–A0252, dated October 27,
2008, to perform the repetitive ECI.
cprice-sewell on DSK8KYBLC1PROD with NOTICES
Inspections of Tier 3 Fan Disks
(j) For CF34–3A1 engines with fan drive
shaft, P/N 6036T78P02, and airworthiness
limitation section life limit of 22,000 CSN,
and CF34–3B1 turbofan engines with Tier 3
fan disks, listed by P/N, SN, and Tier in
Table 1 of GE ASB CF34–AL S/B 72–A0233,
Revision 04, dated October 27, 2008, do the
following:
TEV Inspections, FPI, and ECI
(1) For Tier 3 fan disks not already
inspected using GE ASB CF34–AL S/B 72–
A0233, Revision 03, dated June 27, 2007, or
earlier issue, perform a TEV inspection, an
FPI, and an ECI on the Tier 3 fan disks within
5,000 CIS after September 12, 2007, or by
March 19, 2012, whichever is earlier. Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B 72–
A0233, Revision 04, dated October 27, 2008,
or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B 72–
A0253, dated October 27, 2008, to perform
the TEV inspection, FPI, and ECI.
(2) For Tier 3 fan disks, listed by P/N, SN,
and Tier in Table 1 of GE ASB CF34–AL
S/B 72–A0233, Revision 04, dated October
27, 2008; already inspected using GE ASB
CF34–AL S/B 72–A0233, Revision 03, dated
June 27, 2007, or earlier issue, perform a TEV
inspection and an ECI on the Tier 3 fan disks
at the next shop visit. Use paragraph 3.A of
the Accomplishment Instructions of GE ASB
CF34–AL S/B 72–A0233, Revision 04, dated
October 27, 2008, or use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–AL S/B 72–A0253, dated October 27,
2008, to perform the TEV inspection and ECI.
(3) Repetitive ECI on the Tier 3 fan disks
are not required.
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19:02 Jan 06, 2010
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Inspections of Tier 1 Fan Disks
(k) For CF34–3A1 turbofan engines with
fan drive shaft, P/N 6036T78P02, and
airworthiness limitation section life limit of
15,000 CSN, CF34–1A, CF34–3A, CF34–3A2,
and CF34–3B turbofan engines with Tier 1
fan disks listed by P/N, SN, and Tier in Table
1 of GE ASB CF34–BJ S/B 72–A0212,
Revision 04, dated October 27, 2008, do the
following:
TEV Inspections, FPI, and ECI
(1) For Tier 1 fan disks not already
inspected using GE ASB CF34–BJ S/B 72–
A0212, Revision 03, dated June 27, 2007, or
earlier issue:
(i) Perform a TEV inspection, FPI, and ECI
on the Tier 1 fan disks within 350 CIS after
the effective date of this AD. Use paragraph
3.A of the Accomplishment Instructions of
GE ASB CF34–AL S/B 72–A0212, Revision
04, dated October 27, 2008, or use paragraph
3.A of the Accomplishment Instructions of
GE ASB CF34–AL S/B 72–A0234, dated
October 27, 2008, to perform the TEV
inspection, FPI, and ECI.
(ii) Thereafter, perform repetitive ECI on
the Tier 1 fan disks within intervals of 3,000
CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–BJ S/B 72–A0235, dated October 27,
2008, to perform the repetitive ECI.
(2) For Tier 1 fan disks, listed by P/N, SN,
and Tier in Table 1 of GE ASB CF34–BJ
S/B 72–A0212, Revision 04, dated October
27, 2008; already inspected using GE ASB
CF34–BJ S/B 72–A0212, Revision 03, dated
June 27, 2007, or earlier issue, do the
following:
(i) For Tier 1 fan disks with 2,500 or more
CSLI on the effective date of this AD, perform
an ECI on the Tier 1 fan disks within 500 CIS
after the effective date of this AD. Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–BJ S/B 72–
A0235, dated October 27, 2008, to perform
the ECI.
(ii) For Tier 1 fan disks with fewer than
2,500 CSLI on the effective date of this AD,
perform an ECI on the Tier 1 fan disks within
3,000 CSLI after the effective date of this AD.
Use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–BJ S/B 72–
A0235, dated October 27, 2008, to perform
the ECI.
(iii) Thereafter, perform repetitive ECI on
the Tier 1 fan disks within intervals of 3,000
CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–AL S/B 72–A0235, dated October 27,
2008, to perform the repetitive ECI.
Inspections of Tier 2 Fan Disks
(l) For CF34–3A1 turbofan engines with fan
drive shaft, P/N 6036T78P02, and
airworthiness limitation section life limit of
15,000 CSN, CF34–1A, CF34–3A, CF34–3A2,
and CF34–3B turbofan engines with Tier 2
fan disks listed by P/N, SN, and Tier in Table
1 of GE ASB CF34–AL S/B 72–A0212,
Revision 04, dated October 27, 2008, do the
following:
TEV Inspections, FPI, and ECI
(1) For Tier 2 fan disks not already
inspected using GE ASB CF34–AL S/B 72–
PO 00000
Frm 00028
Fmt 4700
Sfmt 4700
A0212, Revision 03, dated June 27, 2007, or
earlier issue, do the following:
(i) Perform a TEV inspection, FPI, and ECI
on the Tier 2 fan disks within 2,000 CIS after
the effective date of this AD, or within 3,500
CSN after September 12, 2007, or by March
19, 2012, whichever occurs first. Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B 72–
A0212, Revision 04, dated October 27, 2008,
or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–AL S/B 72–
A0234, dated October 27, 2008, to perform
the TEV inspection, FPI, and ECI.
(ii) Thereafter, perform repetitive ECI on
the Tier 2 fan disks within intervals of 3,000
CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–BJ S/B 72–A0235, dated October 27,
2008, to perform the repetitive ECI.
(2) For Tier 2 fan disks, listed by P/N, SN,
and Tier in Table 1 of GE ASB CF34–BJ S/
B 72–A0212, Revision 04, dated October 27,
2008; already inspected using GE ASB CF34–
BJ S/B 72–A0212, Revision 03, dated June 27,
2007, or earlier issue, do the following:
(i) For Tier 2 fan disks with 2,500 or more
CSLI on the effective date of this AD, perform
an ECI on the Tier 2 fan disks within 500 CIS
after the effective date of this AD. Use
paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34–BJ S/B 72–
A0235, dated October 27, 2008, to perform
the ECI.
(ii) For Tier 2 fan disks with fewer than
2,500 CSLI on the effective date of this AD,
perform an ECI on the Tier 2 fan disks within
3,000 CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–BJ S/B 72–A0235, dated October 27,
2008, to perform the ECI.
(iii) Thereafter, perform repetitive ECI on
the Tier 2 fan disks within intervals of 3,000
CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–BJ S/B 72–A0235, dated October 27,
2008, to perform the repetitive ECI.
Inspections of Tier 3 Fan Disks
(m) For CF34–3A1 turbofan engines with
fan drive shaft, P/N 6036T78P02, and
airworthiness limitation section life limit of
15,000 CSN, CF34–1A, CF34–3A, CF34–3A2,
and CF34–3B turbofan engines with Tier 3
fan disks listed by P/N, SN, and Tier in Table
1 of GE ASB CF34–BJ S/B 72–A0212,
Revision 04, dated October 27, 2008, do the
following:
TEV Inspections, FPI, and ECI
(1) For Tier 3 fan disks not already
inspected using GE ASB CF34–AL S/B 72–
A0212, Revision 03, dated June 27, 2007, or
earlier issue, perform a TEV inspection, FPI,
and ECI on the Tier 3 fan disks within 3,500
CIS after September 12, 2007, or by March
19, 2012, whichever is earlier. Use paragraph
3.A of the Accomplishment Instructions of
GE ASB CF34–AL S/B 72–A0212, Revision
04, dated October 27, 2008, or use paragraph
3.A of the Accomplishment Instructions of
GE ASB CF34–AL S/B 72–A0234, dated
October 27, 2008, to perform the TEV
inspection, FPI, and ECI.
(2) For Tier 3 fan disks, listed by P/N, SN,
and Tier in Table 1 of GE ASB CF34–BJ
E:\FR\FM\07JAR1.SGM
07JAR1
915
Federal Register / Vol. 75, No. 4 / Thursday, January 7, 2010 / Rules and Regulations
S/B 72–A0212, Revision 04, dated October
27, 2008; already inspected using GE ASB
CF34–BJ S/B 72–A0212, Revision 03, dated
June 27, 2007, or earlier issue, perform a TEV
inspection and an ECI on the Tier 3 fan disks
at the next shop visit. Use paragraph 3.A of
the Accomplishment Instructions of GE ASB
CF34–BJ S/B 72–A0212, Revision 04, dated
October 27, 2008, or use paragraph 3.A of the
Accomplishment Instructions of GE ASB
CF34–BJ S/B 72–A0234, dated October 27,
2008, to perform the TEV inspection and ECI.
(3) Repetitive ECI on the Tier 3 fan disks
are not required.
Mandatory Terminating Action
(o) Remove from service, Tier 1 and Tier
2 fan disks listed by P/N, SN, and Tier in
Table 1 of GE ASB CF34–AL S/B 72–A0233,
Revision 04, dated October 27, 2008; or
CF34–BJ S/B 72–0212, Revision 04, dated
October 27, 2008, before they exceed their
limited life cycles or September 30, 2018,
whichever occurs first.
Related Information
(p) Contact Tara Chaidez, Aerospace
Engineer, Engine Certification Office, FAA,
Engine and Propeller Directorate, 12 New
England Executive Park, Burlington, MA
01803; e-mail: tara.chaidez@faa.gov;
telephone (781) 238–7773; fax (781) 238–
7199, for more information about this AD.
Alternative Methods of Compliance
(n) The Manager, Engine Certification
Office, has the authority to approve
alternative methods of compliance for this
AD if requested using the procedures found
in 14 CFR 39.19.
Material Incorporated by Reference
(q) You must use the service information
specified in the following Table 1 to perform
the inspections required by this AD. The
Director of the Federal Register approved the
incorporation by reference of the documents
listed in the following Table 1 in accordance
with 5 U.S.C. 552(a) and 1 CFR part 51.
Contact General Electric Company via
Lockheed Martin Technology Services, 10525
Chester Road, Suite C, Cincinnati, Ohio
45215; telephone (513) 672–8400; fax (513)
672–8422, for a copy of this service
information. You may review copies at the
FAA, New England Region, 12 New England
Executive Park, Burlington, MA; or at the
National Archives and Records
Administration (NARA). For information on
the availability of this material at NARA, call
202–741–6030, or go to: https://
www.archives.gov/federal-register/cfr/ibrlocations.html.
TABLE 1—INCORPORATION BY REFERENCE
Service Bulletin No.
Page
CF34–AL S/B 72–A0233. Total Pages—107 ....................................................
CF34–AL S/B 72–A0252. Total Pages—22 ......................................................
CF34–AL S/B 72–A0253. Total Pages—77 ......................................................
CF34–BJ S/B 72–A0212. Total Pages—111 ....................................................
CF34–BJ S/B 72–A0234. Total Pages—82 ......................................................
CF34–BJ S/B 72–A0235. Total Pages—20 ......................................................
Issued in Burlington, Massachusetts, on
December 11, 2009.
Francis A. Favara,
Manager, Engine and Propeller Directorate,
Aircraft Certification Service.
[FR Doc. E9–30471 Filed 1–6–10; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
14 CFR Part 97
[Docket No. 30704; Amdt. No. 3355]
Standard Instrument Approach
Procedures, and Takeoff Minimums
and Obstacle Departure Procedures;
Miscellaneous Amendments
cprice-sewell on DSK8KYBLC1PROD with NOTICES
AGENCY: Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
SUMMARY: This rule establishes, amends,
suspends, or revokes Standard
Instrument Approach Procedures
(SIAPs) and associated Takeoff
Minimums and Obstacle Departure
Procedures for operations at certain
airports. These regulatory actions are
needed because of the adoption of new
or revised criteria, or because of changes
occurring in the National Airspace
System, such as the commissioning of
new navigational facilities, adding new
obstacles, or changing air traffic
requirements. These changes are
VerDate Nov<24>2008
19:02 Jan 06, 2010
Jkt 220001
ALL
ALL
ALL
ALL
ALL
ALL
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.......................
.......................
.......................
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designed to provide safe and efficient
use of the navigable airspace and to
promote safe flight operations under
instrument flight rules at the affected
airports.
DATES: This rule is effective January 7,
2010. The compliance date for each
SIAP, associated Takeoff Minimums,
and ODP is specified in the amendatory
provisions.
The incorporation by reference of
certain publications listed in the
regulations is approved by the Director
of the Federal Register as of January 7,
2010.
ADDRESSES: Availability of matter
incorporated by reference in the
amendment is as follows:
For Examination—
1. FAA Rules Docket, FAA
Headquarters Building, 800
Independence Avenue, SW.,
Washington, DC 20591;
2. The FAA Regional Office of the
region in which the affected airport is
located;
3. The National Flight Procedures
Office, 6500 South MacArthur Blvd.,
Oklahoma City, OK 73169 or
4. The National Archives and Records
Administration (NARA). For
information on the availability of this
material at NARA, call 202–741–6030,
or go to: https://www.archives.gov/
federal_register/
PO 00000
Frm 00029
Fmt 4700
Sfmt 4700
Revision
04 ..........................
Original .................
Original .................
04 ..........................
Original .................
Original .................
Date
October
October
October
October
October
October
27,
27,
27,
27,
27,
27,
2008.
2008.
2008.
2008.
2008.
2008.
code_of_federal_regulations/
ibr_locations.html.
Availability—All SIAPs are available
online free of charge. Visit nfdc.faa.gov
to register. Additionally, individual
SIAP and Takeoff Minimums and ODP
copies may be obtained from:
1. FAA Public Inquiry Center (APA–
200), FAA Headquarters Building, 800
Independence Avenue, SW.,
Washington, DC 20591; or
2. The FAA Regional Office of the
region in which the affected airport is
located.
FOR FURTHER INFORMATION CONTACT:
Harry J. Hodges, Flight Procedure
Standards Branch (AFS–420)Flight
Technologies and Programs Division,
Flight Standards Service, Federal
Aviation Administration, Mike
Monroney Aeronautical Center, 6500
South MacArthur Blvd., Oklahoma City,
OK. 73169 (Mail Address: P.O. Box
25082 Oklahoma City, OK 73125)
telephone: (405) 954–4164.
SUPPLEMENTARY INFORMATION: This rule
amends Title 14, Code of Federal
Regulations, Part 97 (14 CFR part 97) by
amending the referenced SIAPs. The
complete regulatory description of each
SIAP is listed on the appropriate FAA
Form 8260, as modified by the National
Flight Data Center (FDC)/Permanent
Notice to Airmen (P–NOTAM), and is
incorporated by reference in the
amendment under 5 U.S.C. 552(a), 1
E:\FR\FM\07JAR1.SGM
07JAR1
]]>Agencies
[Federal Register Volume 75, Number 4 (Thursday, January 7, 2010)]
[Rules and Regulations]
[Pages 910-915]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E9-30471]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2007-27687; Directorate Identifier 2000-NE-42-AD;
Amendment 39-16144; AD 2009-26-09]
RIN 2120-AA64
Airworthiness Directives; General Electric Company CF34-1A, -3A,
-3A1, -3A2, -3B, and -3B1 Turbofan Engines
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA is superseding an existing airworthiness directive
(AD) for General Electric Company (GE) CF34-1A, -3A, -3A1, -3A2, -3B,
and -3B1 turbofan engines. That AD currently requires a onetime visual
and tactile inspection of certain areas of certain P/N and SN fan disks
for an arc-out defect, within 20 engine flight hours after the
effective date of that AD. This AD requires inspecting certain fan
disks for electrical arc-out indications, removing from service fan
disks with electrical arc-out indications, performing tactile and
enhanced visual (TEV) inspections, fluorescent penetrant inspections
(FPI), and eddy current inspections (ECI) on certain disks that have
already had a shop-level inspection, and repetitive FPI and ECI on
certain fan disks. This AD results from an updated risk analysis by GE
that shows we need to take corrective action that is more stringent. We
are issuing this AD to prevent an uncontained failure of the fan disk,
which could result in damage to the airplane.
DATES: This AD becomes effective February 11, 2010. The Director of the
Federal Register approved the incorporation by reference of certain
publications listed in the regulations as of February 11, 2010.
ADDRESSES: You can get the service information identified in this AD
from General Electric Company via Lockheed Martin Technology Services,
10525 Chester Road, Suite C, Cincinnati, Ohio 45215; telephone (513)
672-8400; fax (513) 672-8422.
The Docket Operations office is located at Docket Management
Facility, U.S. Department of Transportation, 1200 New Jersey Avenue,
SE., West Building Ground Floor, Room W12-140, Washington, DC 20590-
0001.
FOR FURTHER INFORMATION CONTACT: Tara Chaidez, Aerospace Engineer,
Engine Certification Office, FAA, Engine and Propeller Directorate, 12
New England Executive Park, Burlington, MA 01803; e-mail:
tara.chaidez@faa.gov; telephone (781) 238-7773; fax (781) 238-7199.
SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR part 39 by
superseding AD 2007-07-07R1, Amendment 39-15179 (72 FR 49183, August
28, 2007) and AD 2007-05-16, Amendment 39-14977 (72 FR 10054, March 7,
2007), with a proposed AD. The proposed AD applies to GE CF34-1A, -3A,
-3A1, -3A2, -3B, and -3B1 turbofan engines. We published the proposed
AD in the Federal Register on April 17, 2009 (74 FR 17799). That action
proposed to require:
Replacing certain fan disks installed on regional jets
within 15 days after the effective date of the proposed AD, and
On-wing and shop-level inspections of fan disks for
electrical arc-out defects on fan disks installed on regional jets, and
Shop-level inspections of fan disks for electrical arc-out
defects on fan disks installed on business jets.
Examining the AD Docket
You may examine the AD docket on the Internet at https://www.regulations.gov; or in person at the Docket Operations office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this AD, the regulatory evaluation,
any comments received, and other information. The street address for
the Docket Operations office (telephone (800) 647-5527) is provided in
the ADDRESSES section. Comments will be available in the AD docket
shortly after receipt.
Comments
We provided the public the opportunity to participate in the
development of this AD. We have considered the comments received.
Request To Change the Compliance Requirements for Previously Inspected
CF34-3B Tier 3 Disks
Two commenters, GE and Bombardier Flex, ask us to change the
compliance requirements for previously inspected CF34-B tier 3 disks
from ``within 3,500 cycles-since-last inspection (CSLI), but no later
than March 19, 2012'' to ``at the next shop visit.'' The commenters
state that requiring ``within 3,500 CSLI, but no later than March 19,
2012,'' make the requirements more conservative than the tier 1 and
tier 2 disk reinspection programs.
We agree. We have changed paragraph (m)(2) of this AD from ``within
3,500 CSLI, but no later than March 19, 2012'' to ``at the next shop
visit.''
Request To Include Table 2 of GE ASB CF34-BJ S/B 72-A0212, Revision 04,
dated October 27, 2008
One commenter asks us to include Table 2 of GE ASB CF34-BJ S/B 72-
A0212, Revision 04, dated October 27, 2008, in the AD. The commenter
states that many owners, lessors, or their respective representatives
are routinely denied access to the manufacturer's Web site where the
referenced SBs are archived. The commenter states that this makes it
very difficult, if not impossible, to evaluate and schedule compliance
with this AD.
We don't agree. If operators and others who need the service
information can't get the service information from the manufacturer,
they can contact the individual or office identified in
[[Page 911]]
paragraph (p) of this AD. We didn't change the AD.
Request To Allow an Alternative Method of Compliance (AMOC) for the
Inspection Requirements of This AD
One commenter, Air Wisconsin, asks us to allow using the
inspections specified in 72-21-00, Inspection, as specified in AD 2002-
05-02. The commenter states that this is the same requirement as
specified in the accomplishment instructions of the proposed AD.
We disagree. AD 2002-05-02 requires adding the specified
inspections to the airworthiness limitation section of the engine
manual and to the operators approved maintenance program. We do agree
that actions performed under one AD may result in credit for actions
performed in another AD. We didn't change this AD.
Request To Add a Drawdown to Paragraph (g) of the Proposed AD
The same commenter asks us to change paragraph (g) of the proposed
AD from ``within 8,000 CSN'' to ``before accumulating 8,000 CSN or
within 15 days after the effective date of this AD, whichever is
later.'' Paragraph (g) currently requires replacing the disks before
accumulating 8,000 CSN. The commenter stated that he would like the
same 15-day allowance that we provided in paragraph (f) for parts that
have close to 8,000 CSN on the effective date of this AD.
We don't agree. The new life limit is 8,000 CSN on the effective
date of this AD. We removed the 15-day allowance in paragraph (f) so
that both groups use the new life limit.
Request To Use SEI-756, 72-00-00, Special Procedure 60
The same commenter requests that eddy current inspections (ECIs)
performed using SEI-756, 72-21-00, Special Procedure 60 or GE ASB CF34-
AL S/B 72-A0233, Revision 04, dated October 27, 2008, be acceptable in
addition to GE ASB CF34-AL S/B 72A-0252, Dated October 27, 2008. The
commenter states that paragraphs (h)(1)(ii), (h)(2)(iii), (l)(1)(ii),
and (l)(2)(iii) all say ``Use paragraph 3.A. of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0252, dated October 27, 2008, to
perform the repetitive ECI.''
The instructions for performing the repetitive ECI in GE ASB CF34-
AL S/B 72-A0252, dated October 27, 2008, and ASB CF34-AL S/B 72-A0233,
Revision 04, dated October 27, 2008, refer to SEI-756, 72-00-00,
SPECIAL PROCEDURE 60--EDDY CURRENT INSPECTION (ECI) PROCEDURES AND
REQUIREMENTS OF CRITICAL HARDWARE.''
The commenter wants to be able to track all the requirements to one
service bulletin or specific procedure instead of several different
service bulletins.
We don't agree. The ECI referenced in the three documents above are
not the same. The ASBs mandated by this AD provide a more rigorous ECI.
We didn't change the AD.
Request To Use a Single ASB for Each Set of Engine Models
The same commenter requests that TEV inspections, FPIs, and ECIs
performed using GE ASB CF34-AL S/B 72-A0233, Revision 04, dated October
27, 2008, be acceptable to meet the requirements of GE ASB CF34-AL S/B
72A-0253, dated October 27, 2008. The commenter wants to be able to
track all the requirements to one service bulletin or specific
procedure instead of several different service bulletins. The commenter
notes that the instructions for performing the ECI are the same in all
three documents.
We partially agree. The procedures for performing the TEV
inspection, the FPI, and the ECI are the same in the two ASBs
referenced above. We changed paragraphs (h)(1)(i), (i)(1)(i), (j)(1),
and (j)(2) of the proposed AD as follows:
Paragraph (h)(1)(i) from ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0233, Revision
04, dated October 27, 2008, * * *'' to ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0233, Revision
04, dated October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0253, dated October 27, 2008, *
* *''
Paragraph (i)(1)(i) from ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0233, Revision
04, dated October 27, 2008, * * *'' to ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0233, Revision
04, dated October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0253, dated October 27, 2008, *
* *''
Paragraph (j)(1) from ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0233, Revision
04, dated October 27, 2008, * * *'' to ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0233, Revision
04, dated October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0253, dated October 27, 2008, *
* *''
Paragraph (j)(2) from ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0233, Revision
04, dated October 27, 2008, * * *'' to ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0233, Revision
04, dated October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0253, dated October 27, 2008, *
* *''
Since the accomplishment procedures in GE ASB CF34-BJ S/B 72-A0212,
Revision 04, dated October 27, 2008, and the procedures in GE ASB CF34-
BJ S/B 72-0234, dated October 27, 2008, are also the same, we changed
paragraphs (k)(1)(i), (l)(1)(i), (m)(1), and (m)(2) of the proposed AD
as follows:
Paragraph (k)(1)(i) from ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0212, Revision
04, dated October 27, 2008, * * *'' to ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0212, Revision
04, dated October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0234, dated October 27, 2008, *
* *''
Paragraph (l)(1)(i) from ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0212, Revision
04, dated October 27, 2008, * * *'' to ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0212, Revision
04, dated October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0234, dated October 27, 2008, *
* *''
Paragraph (m)(1) from ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0212, Revision
04, dated October 27, 2008, * * *'' to ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0212, Revision
04, dated October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0234, dated October 27, 2008, *
* *''
Paragraph (m)(2) from ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0212, Revision
04, dated October 27, 2008, * * *'' to ``Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-BJ S/B 72-A0212, Revision
04, dated October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE
[[Page 912]]
ASB CF34-BJ S/B 72-A0234, dated October 27, 2008, * * *''
Request To Change Paragraph (j)(2) of the Proposed AD
The same commenter requests that we preface paragraph (j)(2) of the
proposed AD with ``Unless already done.'' We believe the commenter
wants to avoid having to perform the same inspection more than once on
a disk.
We don't agree that the change is needed. Paragraph (e) of the
proposed AD states, ``You are responsible for having the actions
required by this AD performed within the compliance times specified
unless the actions have already been done.''
Request To Correct a Typographical Error in Paragraph (j)(1) of the
Proposed AD
Two commenters, GE and Air Wisconsin, ask us to correct a
typographical error in paragraph (j)(1) of the proposed AD. The
commenters inform us that the reference to GE ASB CF34-AL S/B 72-A0253,
Revision 4, dated October 27, 2008, is not correct. The commenters
inform us that GE ASB CF34-AL S/B 72-A0233, Revision 04, dated October
27, 2008, is the correct reference.
We agree. We have changed paragraph (j)(1) of this AD from ``GE ASB
CF34-AL S/B 72-A0253, Revision 4, dated October 27, 2008'' to ``GE ASB
CF34-AL S/B 72-A0233, Revision 04, dated October 27, 2008.''
Recommendation To Add Removal Requirements to Paragraphs (h), (i), (k),
and (l) of the Proposed AD
One commenter, GE, recommends adding an additional, repeat section
to paragraphs (h), (i), (k), and (l) of the proposed AD. The commenter
feels adding the removal requirements to the paragraphs will enhance
clarity of the AD.
We don't agree. The mandatory terminating actions are already
specified in paragraph (o) of the proposed AD and don't need to be
repeated. We didn't change the AD.
Request To Correct an Engine Model Reference in Paragraphs (k), (l),
and (m) of the Proposed AD
One commenter, GE, informs us that paragraphs (k), (l), and (m) in
the proposed AD omit reference to the CF34-3A1 application and that the
fan drive shaft life limit is incorrectly applied to the CF34-1A
application. The commenter states that this is the same requirement as
specified in the accomplishment instructions of the proposed AD.
We agree. We changed paragraphs (k), (l), and (m) of the proposed
AD from ``For CF34-1A turbofan engines with fan drive shaft, P/N
6036T78P02, and airworthiness limitation section life limit of 15,000
CSN, CF34-3A, CF34-3A2, and CF34-3B turbofan engines * * *'' to ``For
CF34-3A1 turbofan engines with fan drive shaft, P/N 6036T78P02, and
airworthiness limitation section life limit of 15,000 CSN, CF34-1A,
CF34-3A, CF34-3A2, and CF34-3B turbofan engines * * *''
Request To Reference to FPI and ECI in Paragraphs (k)(1)(i) of the
Proposed AD
The same commenter asks us to change paragraphs (k)(1)(i) to add a
reference to the FPI and ECI. The commenter states that the paragraph
currently requires TEV inspection, FPI, and ECI, but the last sentence
says only ``to perform the TEV inspection.'' The commenter feels the
paragraph will be more clear by saying ``To perform the TEV inspection,
FPI, and ECI.''
We agree. We changed paragraph (k)(1)(i) of the proposed AD from
``Use paragraph 3.A of the Accomplishment Instructions of GE ASB CF34-
AL S/B 72-A0212, Revision 04, dated October 27, 2008, or use paragraph
3.A of the Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0234,
dated October 27, 2008, to perform the TEV inspection'' to ``Use
paragraph 3.A of the Accomplishment Instructions of GE ASB CF34-AL S/B
72-A0212, Revision 04, dated October 27, 2008, or use paragraph 3.A of
the Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0234, dated
October 27, 2008, to perform the TEV inspection, FPI, and ECI.''
Request To Correct a Typographical Error in Paragraphs (l)(1)(i) of the
Proposed AD
The same commenter asks us to correct the typographical error of
``CIS'' in paragraph (l)(1)(i) to ``CSN''. The commenter states that
the paragraph should be changed to be consistent with the risk
assessment.
We agree. We changed paragraph (l)(1)(i) of the proposed AD from
``or within 3,500 CIS after September 12, 2007,'' to ``or within 3,500
CSN after September 12, 2007,''.
Request To Change Paragraphs (h), (i), (j), (k), (l), and (m) of the
Proposed AD to Specify RJ and BJ Model Engines
The same commenter asks us to revise paragraphs (h), (i), (j), (l),
and (m) to clarify the instructions related to operators who fly a
regional jet (RJ) with the CF34-3A1 engine as a business jet (BJ)
application. The commenter states that GE ASBs CF34-AL S/B 72-A0233,
Revision 04, dated October 27, 2008; CF34-AL S/B 72-A0252, dated
October 27, 2008; CF34-AL S/B 72-A0253, dated October 27, 2008; apply
to both RJ operators and also to a small number of BJ operators who fly
under the RJ manual. These BJ applications may include both CF34-3B1
and CF34-3A1 models. The proposed AD distinguishes between RJ and BJ
applications based on engine model, and in the case of the CF34-3A1
model, the life limit of the fan drive shaft, P/N 6036T78P02. Modifying
the proposed AD to identify the applications as RJ and BJ, and defining
the RJ and BJ designations, would more clearly identify affected
populations and still meet the FAA's purpose in issuing ADs.
We don't agree. The CF34-1A is used on both the RJ airplane and the
BJ airplane. The engine is modified by service bulletins to allow it to
be used on one configuration or the other. There is nothing to prevent
an engine that was installed on a BJ airplane from being modified and
installed on an RJ airplane: By designating the inspection criteria
based on the life limit of the fan drive shaft, we are making the
regulatory requirements of the proposed AD specific to the engine
configuration instead of the operational configuration. We didn't
change the proposed AD.
Conclusion
We have carefully reviewed the available data, including the
comments received, and determined that air safety and the public
interest require adopting the AD with the changes described previously.
We have determined that these changes will neither increase the
economic burden on any operator nor increase the scope of the AD.
Costs of Compliance
We estimate that this AD will affect 18 engines installed on
airplanes of U.S. registry. We also estimate that it would take about 2
work-hours per engine to perform the required actions, and that the
average labor rate is $80 per work-hour. No parts are required, so
parts would cost about $0. Based on these figures, we estimate the
total cost of the AD to U.S. operators to be $2,880.
Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, Section 106, describes the
authority of the FAA Administrator. Subtitle VII, Aviation Programs,
describes in more detail the scope of the Agency's authority.
[[Page 913]]
We are issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701, ``General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.
Regulatory Findings
We have determined that this AD will not have federalism
implications under Executive Order 13132. This AD will not have a
substantial direct effect on the States, on the relationship between
the national government and the States, or on the distribution of power
and responsibilities among the various levels of government.
For the reasons discussed above, I certify that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866;
(2) Is not a ``significant rule'' under DOT Regulatory Policies and
Procedures (44 FR 11034, February 26, 1979); and
(3) Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
We prepared a summary of the costs to comply with this AD and
placed it in the AD Docket. You may get a copy of this summary at the
address listed under ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
0
Accordingly, under the authority delegated to me by the Administrator,
the Federal Aviation Administration amends 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
0
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by removing Amendment 39-15179 (72 FR
49183, August 28, 2007), and by adding a new airworthiness directive,
Amendment 39-16144, to read as follows:
2009-26-09 General Electric Company: Amendment 39-16144. Docket No.
FAA-2007-27687; Directorate Identifier 2000-NE-42-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective February
11, 2010.
Affected ADs
(b) This AD supersedes AD 2007-05-16, Amendment 39-14977 and AD
2007-07-07R1, Amendment 39-15179.
Applicability
(c) This AD applies to General Electric Company (GE) CF34-1A, -
3A, -3A1, -3A2, -3B, and -3B1 turbofan engines, with fan disks part
numbers (P/Ns) 5921T18G01, 5921T18G09, 5921T18G10, 5921T54G01,
5922T01G02, 5922T01G04, 5922T01G05, 6020T62G04, 6020T62G05,
6078T00G01, 6078T57G01, 6078T57G02, 6078T57G03, 6078T57G04,
6078T57G05, and 6078T57G06 installed. These engines are installed
on, but not limited to, Bombardier Canadair airplane models CL-600-
2A12, -2B16, and -2B19.
Unsafe Condition
(d) This AD results from an updated risk analysis by GE that
shows we need to take corrective action that is more stringent. We
are issuing this AD to prevent an uncontained failure of the fan
disk, which could result in damage to the airplane.
Compliance
(e) You are responsible for having the actions required by this
AD performed within the compliance times specified unless the
actions have already been done.
Removing Certain Fan Disks From Service
(f) For fan disks listed by P/N and serial number (SN) in Table
2 of GE Alert Service Bulletin (ASB) CF34-BJ S/B 72-A0212, Revision
04, dated October 27, 2008; or in Table 2 of GE ASB CF34-AL S/B 72-
A0233, Revision 04, dated October 27, 2008, that have 8,000 CSN or
more on the effective date of this AD, remove fan disks from
service.
(g) For fan disks listed by P/N and serial number (SN) in Table
2 of GE Alert Service Bulletin (ASB) CF34-BJ S/B 72-A0212, Revision
04, dated October 27, 2008; or in Table 2 of GE ASB CF34-AL S/B 72-
A0233, Revision 04, dated October 27, 2008, that have fewer than
8,000 CSN on the effective date of this AD, remove fan disks from
service before accumulating 8,000 CSN.
Inspections of Tier 1 Fan Disks
(h) For CF34-3A1 engines with fan drive shaft, P/N 6036T78P02,
and airworthiness limitation section life limit of 22,000 CSN, and
CF34-3B1 turbofan engines with Tier 1 fan disks listed by P/N, SN,
and Tier in Table 1 of GE ASB CF34-AL S/B 72-A0233, Revision 04,
dated October 27, 2008, do the following:
Tactile and Enhanced Visual (TEV) Inspections, Fluorescent Penetrant
Inspections (FPI), and Eddy Current Inspections (ECI)
(1) For Tier 1 fan disks not already inspected using GE ASB
CF34-AL S/B 72-A0233, Revision 03, dated June 27, 2007, or earlier
issue, do the following:
(i) Perform a TEV inspection, an FPI, and an ECI on the Tier 1
fan disks within 650 cycles-in-service (CIS) after the effective
date of this AD. Use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0233, Revision 04, dated
October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0253, dated October 27, 2008,
to perform the TEV inspection, FPI, and ECI.
(ii) Thereafter, perform repetitive ECI on the Tier 1 fan disks
within intervals of 3,000 cycles-since-last inspection (CSLI). Use
paragraph 3.A of the Accomplishment Instructions of GE ASB CF34-AL
S/B 72-A0252, dated October 27, 2008, to perform the repetitive ECI.
(2) For Tier 1 fan disks, listed by P/N, SN, and Tier in Table 1
of GE ASB CF34-AL S/B 72-A0233, Revision 04, dated October 27, 2008;
already inspected using GE ASB CF34-AL S/B 72-A0233, Revision 03,
dated June 27, 2007, or earlier issue, do the following:
(i) For Tier 1 fan disks with 2,500 or more CSLI on the
effective date of this AD, perform an ECI on the Tier 1 fan disks
within 500 CIS after the effective date of this AD. Use paragraph
3.A of the Accomplishment Instructions of GE ASB CF34-AL S/B 72-
A0252, dated October 27, 2008, to perform the ECI.
(ii) For Tier 1 fan disks with fewer than 2,500 CSLI on the
effective date of this AD, perform an ECI on the Tier 1 fan disks
within 3,000 CSLI. Use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0252, dated October 27, 2008,
to perform the ECI.
(iii) Thereafter, perform repetitive ECI on the Tier 1 fan disks
within intervals of 3,000 CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0252, dated
October 27, 2008, to perform the repetitive ECI.
Inspections of Tier 2 Fan Disks
(i) For CF34-3A1 engines with fan drive shaft, P/N 6036T78P02,
and airworthiness limitation section life limit of 22,000 CSN, and
CF34-3B1 turbofan engines with Tier 2 fan disks listed by P/N, SN,
and Tier in Table 1 of GE ASB CF34-AL S/B 72-A0233, Revision 04,
dated October 27, 2008, do the following:
TEV Inspections, FPI, and ECI
(1) For Tier 2 fan disks not already inspected using GE ASB
CF34-AL S/B 72-A0233, Revision 03, dated June 27, 2007, or earlier
issue, do the following:
(i) Perform a TEV inspection, an FPI, and an ECI on the Tier 2
fan disks within 2,000 CIS after the effective date of this AD, or
within 5,000 CIS after September 12, 2007, or by March 19, 2012,
whichever occurs first. Use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0233, Revision 04, dated
October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0253, dated October 27, 2008,
to perform the TEV inspection, FPI, and ECI.
[[Page 914]]
(ii) Thereafter, perform repetitive eddy current inspections on
the Tier 2 fan disks within intervals of 3,000 CSLI. Use paragraph
3.A of the Accomplishment Instructions of GE ASB CF34-AL S/B 72-
A0252, dated October 27, 2008, to perform the repetitive ECI.
(2) For Tier 2 fan disks, listed by P/N, SN, and Tier in Table 1
of GE ASB CF34-AL S/B 72-A0233, Revision 04, dated October 27, 2008;
already inspected using GE ASB CF34-AL S/B 72-A0233, Revision 03,
dated June 27, 2007, or earlier issue, do the following:
(i) For Tier 2 fan disks with 2,500 or more CSLI on the
effective date of this AD, perform an ECI on the Tier 2 fan disks
within 500 CIS after the effective date of this AD. Use paragraph
3.A of the Accomplishment Instructions of GE ASB CF34-AL S/B 72-
A0252, dated October 27, 2008, to perform the ECI.
(ii) For Tier 2 fan disks with fewer than 2,500 CSLI on the
effective date of this AD, perform an ECI on the Tier 2 fan disks
within 3,000 CSLI. Use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0252, dated October 27, 2008,
to perform the ECI.
(iii) Thereafter, perform repetitive ECI on the Tier 2 fan disks
within intervals of 3,000 CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0252, dated
October 27, 2008, to perform the repetitive ECI.
Inspections of Tier 3 Fan Disks
(j) For CF34-3A1 engines with fan drive shaft, P/N 6036T78P02,
and airworthiness limitation section life limit of 22,000 CSN, and
CF34-3B1 turbofan engines with Tier 3 fan disks, listed by P/N, SN,
and Tier in Table 1 of GE ASB CF34-AL S/B 72-A0233, Revision 04,
dated October 27, 2008, do the following:
TEV Inspections, FPI, and ECI
(1) For Tier 3 fan disks not already inspected using GE ASB
CF34-AL S/B 72-A0233, Revision 03, dated June 27, 2007, or earlier
issue, perform a TEV inspection, an FPI, and an ECI on the Tier 3
fan disks within 5,000 CIS after September 12, 2007, or by March 19,
2012, whichever is earlier. Use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0233, Revision 04, dated
October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0253, dated October 27, 2008,
to perform the TEV inspection, FPI, and ECI.
(2) For Tier 3 fan disks, listed by P/N, SN, and Tier in Table 1
of GE ASB CF34-AL S/B 72-A0233, Revision 04, dated October 27, 2008;
already inspected using GE ASB CF34-AL S/B 72-A0233, Revision 03,
dated June 27, 2007, or earlier issue, perform a TEV inspection and
an ECI on the Tier 3 fan disks at the next shop visit. Use paragraph
3.A of the Accomplishment Instructions of GE ASB CF34-AL S/B 72-
A0233, Revision 04, dated October 27, 2008, or use paragraph 3.A of
the Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0253,
dated October 27, 2008, to perform the TEV inspection and ECI.
(3) Repetitive ECI on the Tier 3 fan disks are not required.
Inspections of Tier 1 Fan Disks
(k) For CF34-3A1 turbofan engines with fan drive shaft, P/N
6036T78P02, and airworthiness limitation section life limit of
15,000 CSN, CF34-1A, CF34-3A, CF34-3A2, and CF34-3B turbofan engines
with Tier 1 fan disks listed by P/N, SN, and Tier in Table 1 of GE
ASB CF34-BJ S/B 72-A0212, Revision 04, dated October 27, 2008, do
the following:
TEV Inspections, FPI, and ECI
(1) For Tier 1 fan disks not already inspected using GE ASB
CF34-BJ S/B 72-A0212, Revision 03, dated June 27, 2007, or earlier
issue:
(i) Perform a TEV inspection, FPI, and ECI on the Tier 1 fan
disks within 350 CIS after the effective date of this AD. Use
paragraph 3.A of the Accomplishment Instructions of GE ASB CF34-AL
S/B 72-A0212, Revision 04, dated October 27, 2008, or use paragraph
3.A of the Accomplishment Instructions of GE ASB CF34-AL S/B 72-
A0234, dated October 27, 2008, to perform the TEV inspection, FPI,
and ECI.
(ii) Thereafter, perform repetitive ECI on the Tier 1 fan disks
within intervals of 3,000 CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-BJ S/B 72-A0235, dated
October 27, 2008, to perform the repetitive ECI.
(2) For Tier 1 fan disks, listed by P/N, SN, and Tier in Table 1
of GE ASB CF34-BJ S/B 72-A0212, Revision 04, dated October 27, 2008;
already inspected using GE ASB CF34-BJ S/B 72-A0212, Revision 03,
dated June 27, 2007, or earlier issue, do the following:
(i) For Tier 1 fan disks with 2,500 or more CSLI on the
effective date of this AD, perform an ECI on the Tier 1 fan disks
within 500 CIS after the effective date of this AD. Use paragraph
3.A of the Accomplishment Instructions of GE ASB CF34-BJ S/B 72-
A0235, dated October 27, 2008, to perform the ECI.
(ii) For Tier 1 fan disks with fewer than 2,500 CSLI on the
effective date of this AD, perform an ECI on the Tier 1 fan disks
within 3,000 CSLI after the effective date of this AD. Use paragraph
3.A of the Accomplishment Instructions of GE ASB CF34-BJ S/B 72-
A0235, dated October 27, 2008, to perform the ECI.
(iii) Thereafter, perform repetitive ECI on the Tier 1 fan disks
within intervals of 3,000 CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-AL S/B 72-A0235, dated
October 27, 2008, to perform the repetitive ECI.
Inspections of Tier 2 Fan Disks
(l) For CF34-3A1 turbofan engines with fan drive shaft, P/N
6036T78P02, and airworthiness limitation section life limit of
15,000 CSN, CF34-1A, CF34-3A, CF34-3A2, and CF34-3B turbofan engines
with Tier 2 fan disks listed by P/N, SN, and Tier in Table 1 of GE
ASB CF34-AL S/B 72-A0212, Revision 04, dated October 27, 2008, do
the following:
TEV Inspections, FPI, and ECI
(1) For Tier 2 fan disks not already inspected using GE ASB
CF34-AL S/B 72-A0212, Revision 03, dated June 27, 2007, or earlier
issue, do the following:
(i) Perform a TEV inspection, FPI, and ECI on the Tier 2 fan
disks within 2,000 CIS after the effective date of this AD, or
within 3,500 CSN after September 12, 2007, or by March 19, 2012,
whichever occurs first. Use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0212, Revision 04, dated
October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0234, dated October 27, 2008,
to perform the TEV inspection, FPI, and ECI.
(ii) Thereafter, perform repetitive ECI on the Tier 2 fan disks
within intervals of 3,000 CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-BJ S/B 72-A0235, dated
October 27, 2008, to perform the repetitive ECI.
(2) For Tier 2 fan disks, listed by P/N, SN, and Tier in Table 1
of GE ASB CF34-BJ S/B 72-A0212, Revision 04, dated October 27, 2008;
already inspected using GE ASB CF34-BJ S/B 72-A0212, Revision 03,
dated June 27, 2007, or earlier issue, do the following:
(i) For Tier 2 fan disks with 2,500 or more CSLI on the
effective date of this AD, perform an ECI on the Tier 2 fan disks
within 500 CIS after the effective date of this AD. Use paragraph
3.A of the Accomplishment Instructions of GE ASB CF34-BJ S/B 72-
A0235, dated October 27, 2008, to perform the ECI.
(ii) For Tier 2 fan disks with fewer than 2,500 CSLI on the
effective date of this AD, perform an ECI on the Tier 2 fan disks
within 3,000 CSLI. Use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-BJ S/B 72-A0235, dated October 27, 2008,
to perform the ECI.
(iii) Thereafter, perform repetitive ECI on the Tier 2 fan disks
within intervals of 3,000 CSLI. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-BJ S/B 72-A0235, dated
October 27, 2008, to perform the repetitive ECI.
Inspections of Tier 3 Fan Disks
(m) For CF34-3A1 turbofan engines with fan drive shaft, P/N
6036T78P02, and airworthiness limitation section life limit of
15,000 CSN, CF34-1A, CF34-3A, CF34-3A2, and CF34-3B turbofan engines
with Tier 3 fan disks listed by P/N, SN, and Tier in Table 1 of GE
ASB CF34-BJ S/B 72-A0212, Revision 04, dated October 27, 2008, do
the following:
TEV Inspections, FPI, and ECI
(1) For Tier 3 fan disks not already inspected using GE ASB
CF34-AL S/B 72-A0212, Revision 03, dated June 27, 2007, or earlier
issue, perform a TEV inspection, FPI, and ECI on the Tier 3 fan
disks within 3,500 CIS after September 12, 2007, or by March 19,
2012, whichever is earlier. Use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0212, Revision 04, dated
October 27, 2008, or use paragraph 3.A of the Accomplishment
Instructions of GE ASB CF34-AL S/B 72-A0234, dated October 27, 2008,
to perform the TEV inspection, FPI, and ECI.
(2) For Tier 3 fan disks, listed by P/N, SN, and Tier in Table 1
of GE ASB CF34-BJ
[[Page 915]]
S/B 72-A0212, Revision 04, dated October 27, 2008; already inspected
using GE ASB CF34-BJ S/B 72-A0212, Revision 03, dated June 27, 2007,
or earlier issue, perform a TEV inspection and an ECI on the Tier 3
fan disks at the next shop visit. Use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-BJ S/B 72-A0212, Revision
04, dated October 27, 2008, or use paragraph 3.A of the
Accomplishment Instructions of GE ASB CF34-BJ S/B 72-A0234, dated
October 27, 2008, to perform the TEV inspection and ECI.
(3) Repetitive ECI on the Tier 3 fan disks are not required.
Alternative Methods of Compliance
(n) The Manager, Engine Certification Office, has the authority
to approve alternative methods of compliance for this AD if
requested using the procedures found in 14 CFR 39.19.
Mandatory Terminating Action
(o) Remove from service, Tier 1 and Tier 2 fan disks listed by
P/N, SN, and Tier in Table 1 of GE ASB CF34-AL S/B 72-A0233,
Revision 04, dated October 27, 2008; or CF34-BJ S/B 72-0212,
Revision 04, dated October 27, 2008, before they exceed their
limited life cycles or September 30, 2018, whichever occurs first.
Related Information
(p) Contact Tara Chaidez, Aerospace Engineer, Engine
Certification Office, FAA, Engine and Propeller Directorate, 12 New
England Executive Park, Burlington, MA 01803; e-mail:
tara.chaidez@faa.gov; telephone (781) 238-7773; fax (781) 238-7199,
for more information about this AD.
Material Incorporated by Reference
(q) You must use the service information specified in the
following Table 1 to perform the inspections required by this AD.
The Director of the Federal Register approved the incorporation by
reference of the documents listed in the following Table 1 in
accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact General
Electric Company via Lockheed Martin Technology Services, 10525
Chester Road, Suite C, Cincinnati, Ohio 45215; telephone (513) 672-
8400; fax (513) 672-8422, for a copy of this service information.
You may review copies at the FAA, New England Region, 12 New England
Executive Park, Burlington, MA; or at the National Archives and
Records Administration (NARA). For information on the availability
of this material at NARA, call 202-741-6030, or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html.
Table 1--Incorporation by Reference
----------------------------------------------------------------------------------------------------------------
Service Bulletin No. Page Revision Date
----------------------------------------------------------------------------------------------------------------
CF34-AL S/B 72-A0233. Total Pages-- ALL.................. 04.................. October 27, 2008.
107.
CF34-AL S/B 72-A0252. Total Pages-- ALL.................. Original............ October 27, 2008.
22.
CF34-AL S/B 72-A0253. Total Pages-- ALL.................. Original............ October 27, 2008.
77.
CF34-BJ S/B 72-A0212. Total Pages-- ALL.................. 04.................. October 27, 2008.
111.
CF34-BJ S/B 72-A0234. Total Pages-- ALL.................. Original............ October 27, 2008.
82.
CF34-BJ S/B 72-A0235. Total Pages-- ALL.................. Original............ October 27, 2008.
20.
----------------------------------------------------------------------------------------------------------------
Issued in Burlington, Massachusetts, on December 11, 2009.
Francis A. Favara,
Manager, Engine and Propeller Directorate, Aircraft Certification
Service.
[FR Doc. E9-30471 Filed 1-6-10; 8:45 am]
BILLING CODE 4910-13-P
