Airworthiness Directives; Boeing Model 757-200, -200CB, and -300 Series Airplanes, 71214-71216 [E7-24337]
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Federal Register / Vol. 72, No. 241 / Monday, December 17, 2007 / Rules and Regulations
Affected ADs
(b) None.
make those findings. For a repair method to
be approved, the repair must meet the
certification basis of the airplane, and the
approval must specifically refer to this AD.
Applicability
(c) This AD applies to all Boeing Model
777–200, –200LR, –300, and –300ER series
airplanes, certificated in any category.
Unsafe Condition
(d) This AD results from a report that a
cracked left elevator actuator fitting was
found on a Model 777 airplane. We are
issuing this AD to detect and correct a
cracked actuator fitting, which could detach
from the elevator and lead to an unrestrained
elevator and an unacceptable flutter
condition, which could result in loss of
airplane control.
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.
ebenthall on PROD1PC69 with RULES
Inspections
(f) At the applicable time specified in
paragraph 1.E. ‘‘Compliance’’ of Boeing Alert
Service Bulletin 777–55A0015, dated April
19, 2007, do an initial dye penetrant or highfrequency eddy current (HFEC) inspection for
cracking of the elevator actuator fittings, and,
thereafter, do repetitive dye penetrant, HFEC,
or detailed inspections at the applicable
times specified in paragraph 1.E.
‘‘Compliance.’’ Before further flight, replace
any fitting found to be cracked during any
inspection required by this AD with a new
fitting having the same part number, or an
optional part number as identified in the
service bulletin. Thereafter, do initial and
repetitive inspections of the replacement
fitting as described in paragraph 1.E. of the
service bulletin. Do all inspections and
actions described in this paragraph in
accordance with the Accomplishment
Instructions of the service bulletin; except,
where the service bulletin specifies a
compliance time after the date on the service
bulletin, this AD requires compliance within
the specified compliance time after the
effective date of this AD.
Alternative Methods of Compliance
(AMOCs)
(g)(1) The Manager, Seattle Aircraft
Certification Office (ACO), FAA, has the
authority to approve AMOCs for this AD, if
requested in accordance with the procedures
found in 14 CFR 39.19.
(2) To request a different method of
compliance or a different compliance time
for this AD, follow the procedures in 14 CFR
39.19. Before using any approved AMOC on
any airplane to which the AMOC applies,
notify your appropriate principal inspector
(PI) in the FAA Flight Standards District
Office (FSDO), or lacking a PI, your local
FSDO.
(3) An AMOC that provides an acceptable
level of safety may be used for any repair
required by this AD, if it is approved by an
Authorized Representative for the Boeing
Commercial Airplanes Delegation Option
Authorization Organization who has been
authorized by the Manager, Seattle ACO, to
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15:24 Dec 14, 2007
Jkt 214001
Material Incorporated by Reference
(h) You must use Boeing Alert Service
Bulletin 777–55A0015, dated April 19, 2007,
to perform the actions that are required by
this AD, unless the AD specifies otherwise.
The Director of the Federal Register approved
the incorporation by reference of this
document in accordance with 5 U.S.C. 552(a)
and 1 CFR part 51. Contact Boeing
Commercial Airplanes, P.O. Box 3707,
Seattle, Washington 98124–2207, for a copy
of this service information. You may review
copies at the FAA, Transport Airplane
Directorate, 1601 Lind Avenue, SW., Renton,
Washington; 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.
Issued in Renton, Washington, on
December 10, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E7–24338 Filed 12–14–07; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2007–28990; Directorate
Identifier 2007–NM–033–AD; Amendment
39–15304; AD 2007–26–02]
RIN 2120–AA64
Airworthiness Directives; Boeing
Model 757–200, –200CB, and –300
Series Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
AGENCY:
SUMMARY: We are adopting a new
airworthiness directive (AD) for certain
Boeing Model 757–200, –200CB, and
–300 series airplanes. This AD requires
repetitive detailed inspections with a
borescope for cracks of the intercostal
tee clips; or repetitive detailed
inspections for cracks of the intercostal
tee clips and attachment fasteners at the
number 3 and number 4 doorstops of
the passenger door cutouts; and related
investigative and corrective actions if
necessary. This AD also provides an
optional terminating action for the
repetitive inspections. This AD results
from reports of cracked intercostal tee
clips at the number 3 and number 4
doorstops of the passenger door cutouts.
We are issuing this AD to detect and
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correct cracking of the tee clips, which
could result in additional stress on the
adjacent tee clips, surrounding
intercostals, edge frame, door structure
and doorstops. This additional stress
could cause further cracking or breaking
of the tee clips, which could result in
failure of the door to seal and
consequent rapid decompression of the
airplane.
DATES: This AD is effective January 22,
2008.
The Director of the Federal Register
approved the incorporation by reference
of a certain publication listed in this AD
as of January 22, 2008.
We must receive comments on this
AD by January 22, 2008.
ADDRESSES: For service information
identified in this AD, contact Boeing
Commercial Airplanes, P.O. Box 3707,
Seattle, Washington 98124–2207.
Examining the AD Docket
You may examine the AD docket on
the Internet at https://
www.regulations.gov or in person at the
Docket Management Facility 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 address for the
Docket Office (telephone 800–647–5527)
is the Document Management Facility,
U.S. Department of Transportation,
Docket Operations, M–30, West
Building Ground Floor, Room W12–140,
1200 New Jersey Avenue, SE.,
Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT:
Jason Deutschman, Aerospace Engineer,
Airframe Branch, ANM–120S, FAA,
Seattle Aircraft Certification Office,
1601 Lind Avenue, SW., Renton,
Washington 98057–3356; telephone
(425) 917–6449; fax (425) 917–6590.
SUPPLEMENTARY INFORMATION:
Discussion
We issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 to include an airworthiness
directive (AD) that would apply to
certain Boeing Model 757–200, –200CB,
and –300 series airplanes. That NPRM
was published in the Federal Register
on August 16, 2007 (72 FR 45961). That
NPRM proposed to require repetitive
inspections for cracks of the intercostal
tee clips and attachment fasteners at the
number 3 and number 4 doorstops of
the passenger door cutouts, or repetitive
inspections for cracks of the intercostal
tee clips; and related investigative/
corrective actions if necessary. That
NPRM also provides an optional
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Federal Register / Vol. 72, No. 241 / Monday, December 17, 2007 / Rules and Regulations
terminating action for the repetitive
inspections.
Comments
We gave the public the opportunity to
participate in developing this AD. We
considered the comments received.
Support for the NPRM
Continental Airlines (CAL) supports
the NPRM and notes that it has an ongoing customized passenger door
maintenance program already in place
to inspect the subject area on its
airplanes at 4C and 8C heavy checks.
CAL adds that it has found no cracks on
its airplanes, but intends to incorporate
the terminating action provided in the
NPRM at the next 4C or 8C opportunity.
ebenthall on PROD1PC69 with RULES
Request To Include Access and Closeup Costs
Boeing asks that the costs to gain and
close access for the proposed detailed
inspection be included to better reflect
the cost difference between the two
inspection options provided in the
NPRM (detailed versus borescope).
Boeing estimates 9.5 work hours to gain
access by removing existing galleys, and
Boeing estimates another 10 work hours
to replace the galleys after inspection to
close access. Boeing states that this adds
a total of 19.5 hours of work at a cost
of $1,560 per airplane based on an
average labor rate of $80 per work hour.
This adds up to an additional cost to the
fleet of $505,440 over the $51,840 cost
that is shown. This access cost is not
incurred if the alternative borescope
inspection method is used; however, if
repairs are to be performed, either to
address cracking or to terminate
inspections, the access and close-out
costs would be incurred in addition to
parts costs in order to perform the
required part replacements. Boeing adds
that this would affect the supplementary
information in the estimated Costs of
Compliance paragraph.
We acknowledge Boeing’s concerns.
However, because operators are given
the option of doing the detailed
inspection or the detailed inspection
with a borescope (which takes longer),
the cost depends on which inspection is
done. The cost impact figures discussed
in AD rulemaking actions represent only
the time necessary to perform the
specific actions actually required by the
AD. These figures typically do not
include incidental costs, such as the
time required to gain access and close
up, or the costs of ‘‘on-condition’’
actions such as repairs (that is, actions
needed to correct an unsafe condition).
We have made no change to the AD in
this regard.
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15:24 Dec 14, 2007
Jkt 214001
Clarification of Summary Language
We revised the Summary section of
this final rule to specify the repetitive
inspection methods.
Conclusion
We reviewed the relevant data,
considered the comments received, and
determined that air safety and the
public interest require adopting the AD
as proposed.
Difference Between the Proposed AD
and Service Information
The service bulletin specifies to
contact the manufacturer for
instructions on how to repair certain
conditions, but this AD requires
repairing those conditions in one of the
following ways:
• Using a method that we approve; or
• Using data that meet the
certification basis of the airplane, and
that have been approved by an
Authorized Representative for the
Boeing Commercial Airplanes
Delegation Option Authorization
Organization whom we have authorized
to make those findings.
Costs of Compliance
There are about 912 airplanes of the
affected design in the worldwide fleet.
This AD affects about 324 airplanes of
U.S. registry.
The detailed inspection, if
accomplished, takes about 2 work hours
per airplane, at an average work rate of
$80 per work hour. Based on these
figures, the estimated cost of the
detailed inspections required by this AD
is $51,840, or $160 per airplane, per
inspection cycle.
The borescope inspection, if
accomplished, takes about 3 work hours
per airplane, at an average work rate of
$80 per work hour. Based on these
figures, the estimated cost of the
borescope inspections required by this
AD is $77,760, or $240 per airplane, per
inspection cycle.
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.
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
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71215
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
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.
You can find our regulatory
evaluation and the estimated costs of
compliance in the AD Docket.
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 FAA amends 14 CFR part 39 as
follows:
I
PART 39—AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:
I
Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13
[Amended]
2. The FAA amends § 39.13 by adding
the following new AD:
I
2007–26–02 Boeing: Amendment 39–15304.
Docket No. FAA–2007–28990;
Directorate Identifier 2007–NM–033–AD.
Effective Date
(a) This airworthiness directive (AD) is
effective January 22, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Boeing Model 757–
200, –200CB, and –300 series airplanes,
certificated in any category; as identified in
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71216
Federal Register / Vol. 72, No. 241 / Monday, December 17, 2007 / Rules and Regulations
Boeing Alert Service Bulletin 757–53A0093,
dated November 8, 2006.
Unsafe Condition
(d) This AD results from reports of cracked
intercostal tee clips at the number 3 and
number 4 doorstops of the passenger door
cutouts. We are issuing this AD to detect and
correct cracking of the tee clips, which could
result in additional stress on the adjacent tee
clips, surrounding intercostals, edge frame,
door structure and doorstops. This additional
stress could cause further cracking or
breaking of the tee clips, which could result
in failure of the door to seal and consequent
rapid decompression of 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.
ebenthall on PROD1PC69 with RULES
Repetitive Inspections/Investigative and
Corrective Actions
(f) Before the accumulation of 20,000 total
flight cycles or within 3,000 flight cycles
after the effective date of this AD, whichever
is later: Do the applicable inspection
specified in paragraph (f)(1) or (f)(2) of this
AD by doing all the actions including all
applicable related investigative (additional
detailed inspections if necessary) and
corrective actions; except as provided by
paragraph (g) of this AD; in accordance with
the Accomplishment Instructions of Boeing
Alert Service Bulletin 757–53A0093, dated
November 8, 2006. All related investigative
and corrective actions must be done before
further flight.
(1) Do a detailed inspection for cracks of
the intercostal tee clips and attachment
fasteners at the number 3 and number 4
doorstops of the passenger door cutouts.
Repeat the inspection thereafter at intervals
not to exceed 3,000 flight cycles until
accomplishment of the terminating action
specified in paragraph (h) of this AD.
(2) Do a detailed inspection with a
borescope for cracks of the intercostal tee
clips. Repeat the inspection thereafter at
intervals not to exceed 3,000 flight cycles
until accomplishment of the terminating
action specified in paragraph (h) of this AD.
(g) If any cracked structure is found during
any inspection required by this AD, and the
Accomplishment Instructions of Boeing Alert
Service Bulletin 757–53A0093, dated
November 8, 2006, specify to contact Boeing
for appropriate action: Before further flight,
repair any cracked structure using a method
approved in accordance with the procedures
specified in paragraph (i)(2) of this AD.
Optional Terminating Action
(h) Replacing both intercostal tee clips on
the left and right sides with new tee clips in
accordance with Part 3 of the
Accomplishment Instructions of Boeing Alert
Service Bulletin 757–53A0093, dated
November 8, 2006, terminates the repetitive
inspections required by this AD.
Alternative Methods of Compliance
(AMOCs)
(i)(1) The Manager, Seattle Aircraft
Certification Office (ACO), FAA, has the
VerDate Aug<31>2005
15:24 Dec 14, 2007
Jkt 214001
authority to approve AMOCs for this AD, if
requested in accordance with the procedures
found in 14 CFR 39.19.
(2) An AMOC that provides an acceptable
level of safety may be used for any repair
required by this AD, if it is approved by an
Authorized Representative for the Boeing
Commercial Airplanes Delegation Option
Authorization Organization who has been
authorized by the Manager, Seattle ACO, to
make those findings. For a repair method to
be approved, the repair must meet the
certification basis of the airplane, and the
approval must specifically refer to this AD.
(3) To request a different method of
compliance or a different compliance time
for this AD, follow the procedures in 14 CFR
39.19. Before using any approved AMOC on
any airplane to which the AMOC applies,
notify your appropriate principal inspector
(PI) in the FAA Flight Standards District
Office (FSDO), or lacking a PI, your local
FSDO.
Material Incorporated by Reference
(j) You must use Boeing Alert Service
Bulletin 757–53A0093, dated November 8,
2006, to do the actions required by this AD,
unless the AD specifies otherwise.
(1) The Director of the Federal Register
approved the incorporation by reference of
this service information under 5 U.S.C.
552(a) and 1 CFR part 51.
(2) For service information identified in
this AD, contact Boeing Commercial
Airplanes, P.O. Box 3707, Seattle,
Washington 98124–2207.
(3) You may review copies of the service
information incorporated by reference at the
FAA, Transport Airplane Directorate, 1601
Lind Avenue, SW., Renton, Washington; 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/
code_of_federal_regulations/
ibr_locations.html.
Issued in Renton, Washington, on
December 10, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E7–24337 Filed 12–14–07; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2007–28942; Directorate
Identifier 2007–NM–093–AD; Amendment
39–15306; AD 2007–26–04]
RIN 2120–AA64
Airworthiness Directives; Boeing
Model 737–100, –200, –200C, –300,
–400, and –500 Series Airplanes
Federal Aviation
Administration (FAA), DOT.
AGENCY:
PO 00000
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Fmt 4700
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ACTION:
Final rule.
SUMMARY: We are adopting a new
airworthiness directive (AD) for certain
Boeing Model 737–100, –200, –200C,
–300, –400, and –500 series airplanes.
This AD requires repetitive detailed and
high-frequency eddy current inspections
for cracking around the heads of the
fasteners on the forward fastener row of
certain areas of the station (STA) 259.5
circumferential butt splice, and repair if
necessary. This AD also requires a
preventive modification, which
eliminates the need for the repetitive
inspections. This AD results from a
report that an operator found multiple
cracks in the fuselage skin of a Model
737–200 airplane, at the forward
fastener row of the STA 259.5
circumferential butt splice between
stringers 19 and 24. We are issuing this
AD to prevent cracking of the STA 259.5
circumferential butt splice, which could
result in loss of structural integrity of
the fuselage skin and possible loss of
cabin pressure.
DATES: This AD is effective January 22,
2008.
The Director of the Federal Register
approved the incorporation by reference
of a certain publication listed in this AD
as of January 22, 2008.
ADDRESSES: For service information
identified in this AD, contact Boeing
Commercial Airplanes, P.O. Box 3707,
Seattle, Washington 98124–2207.
Examining the AD Docket
You may examine the AD docket on
the Internet at https://
www.regulations.gov; or in person at the
Docket Management Facility 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 address for the
Docket Office (telephone 800–647–5527)
is the Docket Management Facility, U.S.
Department of Transportation, Docket
Operations, M–30, West Building,
Ground Floor, Room W12–140, 1200
New Jersey Avenue, SE., Washington,
DC 20590.
FOR FURTHER INFORMATION CONTACT:
Wayne Lockett, Aerospace Engineer,
Airframe Branch, ANM–120S, FAA,
Seattle Aircraft Certification Office,
1601 Lind Avenue, SW., Renton,
Washington 98057–3356; telephone
(425) 917–6447; fax (425) 917–6590.
SUPPLEMENTARY INFORMATION:
Discussion
We issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 to include an airworthiness
E:\FR\FM\17DER1.SGM
17DER1
]]>Agencies
[Federal Register Volume 72, Number 241 (Monday, December 17, 2007)]
[Rules and Regulations]
[Pages 71214-71216]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-24337]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2007-28990; Directorate Identifier 2007-NM-033-AD;
Amendment 39-15304; AD 2007-26-02]
RIN 2120-AA64
Airworthiness Directives; Boeing Model 757-200, -200CB, and -300
Series Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: We are adopting a new airworthiness directive (AD) for certain
Boeing Model 757-200, -200CB, and -300 series airplanes. This AD
requires repetitive detailed inspections with a borescope for cracks of
the intercostal tee clips; or repetitive detailed inspections for
cracks of the intercostal tee clips and attachment fasteners at the
number 3 and number 4 doorstops of the passenger door cutouts; and
related investigative and corrective actions if necessary. This AD also
provides an optional terminating action for the repetitive inspections.
This AD results from reports of cracked intercostal tee clips at the
number 3 and number 4 doorstops of the passenger door cutouts. We are
issuing this AD to detect and correct cracking of the tee clips, which
could result in additional stress on the adjacent tee clips,
surrounding intercostals, edge frame, door structure and doorstops.
This additional stress could cause further cracking or breaking of the
tee clips, which could result in failure of the door to seal and
consequent rapid decompression of the airplane.
DATES: This AD is effective January 22, 2008.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of January 22,
2008.
We must receive comments on this AD by January 22, 2008.
ADDRESSES: For service information identified in this AD, contact
Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-
2207.
Examining the AD Docket
You may examine the AD docket on the Internet at https://
www.regulations.gov or in person at the Docket Management Facility
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 address for the
Docket Office (telephone 800-647-5527) is the Document Management
Facility, U.S. Department of Transportation, Docket Operations, M-30,
West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE.,
Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Jason Deutschman, Aerospace Engineer,
Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office,
1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425)
917-6449; fax (425) 917-6590.
SUPPLEMENTARY INFORMATION:
Discussion
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 to include an airworthiness directive (AD) that would apply to
certain Boeing Model 757-200, -200CB, and -300 series airplanes. That
NPRM was published in the Federal Register on August 16, 2007 (72 FR
45961). That NPRM proposed to require repetitive inspections for cracks
of the intercostal tee clips and attachment fasteners at the number 3
and number 4 doorstops of the passenger door cutouts, or repetitive
inspections for cracks of the intercostal tee clips; and related
investigative/corrective actions if necessary. That NPRM also provides
an optional
[[Page 71215]]
terminating action for the repetitive inspections.
Comments
We gave the public the opportunity to participate in developing
this AD. We considered the comments received.
Support for the NPRM
Continental Airlines (CAL) supports the NPRM and notes that it has
an on-going customized passenger door maintenance program already in
place to inspect the subject area on its airplanes at 4C and 8C heavy
checks. CAL adds that it has found no cracks on its airplanes, but
intends to incorporate the terminating action provided in the NPRM at
the next 4C or 8C opportunity.
Request To Include Access and Close-up Costs
Boeing asks that the costs to gain and close access for the
proposed detailed inspection be included to better reflect the cost
difference between the two inspection options provided in the NPRM
(detailed versus borescope). Boeing estimates 9.5 work hours to gain
access by removing existing galleys, and Boeing estimates another 10
work hours to replace the galleys after inspection to close access.
Boeing states that this adds a total of 19.5 hours of work at a cost of
$1,560 per airplane based on an average labor rate of $80 per work
hour. This adds up to an additional cost to the fleet of $505,440 over
the $51,840 cost that is shown. This access cost is not incurred if the
alternative borescope inspection method is used; however, if repairs
are to be performed, either to address cracking or to terminate
inspections, the access and close-out costs would be incurred in
addition to parts costs in order to perform the required part
replacements. Boeing adds that this would affect the supplementary
information in the estimated Costs of Compliance paragraph.
We acknowledge Boeing's concerns. However, because operators are
given the option of doing the detailed inspection or the detailed
inspection with a borescope (which takes longer), the cost depends on
which inspection is done. The cost impact figures discussed in AD
rulemaking actions represent only the time necessary to perform the
specific actions actually required by the AD. These figures typically
do not include incidental costs, such as the time required to gain
access and close up, or the costs of ``on-condition'' actions such as
repairs (that is, actions needed to correct an unsafe condition). We
have made no change to the AD in this regard.
Clarification of Summary Language
We revised the Summary section of this final rule to specify the
repetitive inspection methods.
Conclusion
We reviewed the relevant data, considered the comments received,
and determined that air safety and the public interest require adopting
the AD as proposed.
Difference Between the Proposed AD and Service Information
The service bulletin specifies to contact the manufacturer for
instructions on how to repair certain conditions, but this AD requires
repairing those conditions in one of the following ways:
Using a method that we approve; or
Using data that meet the certification basis of the
airplane, and that have been approved by an Authorized Representative
for the Boeing Commercial Airplanes Delegation Option Authorization
Organization whom we have authorized to make those findings.
Costs of Compliance
There are about 912 airplanes of the affected design in the
worldwide fleet. This AD affects about 324 airplanes of U.S. registry.
The detailed inspection, if accomplished, takes about 2 work hours
per airplane, at an average work rate of $80 per work hour. Based on
these figures, the estimated cost of the detailed inspections required
by this AD is $51,840, or $160 per airplane, per inspection cycle.
The borescope inspection, if accomplished, takes about 3 work hours
per airplane, at an average work rate of $80 per work hour. Based on
these figures, the estimated cost of the borescope inspections required
by this AD is $77,760, or $240 per airplane, per inspection cycle.
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.
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
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.
You can find our regulatory evaluation and the estimated costs of
compliance in the AD Docket.
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 FAA 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 adding the following new AD:
2007-26-02 Boeing: Amendment 39-15304. Docket No. FAA-2007-28990;
Directorate Identifier 2007-NM-033-AD.
Effective Date
(a) This airworthiness directive (AD) is effective January 22,
2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Boeing Model 757-200, -200CB, and -300
series airplanes, certificated in any category; as identified in
[[Page 71216]]
Boeing Alert Service Bulletin 757-53A0093, dated November 8, 2006.
Unsafe Condition
(d) This AD results from reports of cracked intercostal tee
clips at the number 3 and number 4 doorstops of the passenger door
cutouts. We are issuing this AD to detect and correct cracking of
the tee clips, which could result in additional stress on the
adjacent tee clips, surrounding intercostals, edge frame, door
structure and doorstops. This additional stress could cause further
cracking or breaking of the tee clips, which could result in failure
of the door to seal and consequent rapid decompression of 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.
Repetitive Inspections/Investigative and Corrective Actions
(f) Before the accumulation of 20,000 total flight cycles or
within 3,000 flight cycles after the effective date of this AD,
whichever is later: Do the applicable inspection specified in
paragraph (f)(1) or (f)(2) of this AD by doing all the actions
including all applicable related investigative (additional detailed
inspections if necessary) and corrective actions; except as provided
by paragraph (g) of this AD; in accordance with the Accomplishment
Instructions of Boeing Alert Service Bulletin 757-53A0093, dated
November 8, 2006. All related investigative and corrective actions
must be done before further flight.
(1) Do a detailed inspection for cracks of the intercostal tee
clips and attachment fasteners at the number 3 and number 4
doorstops of the passenger door cutouts. Repeat the inspection
thereafter at intervals not to exceed 3,000 flight cycles until
accomplishment of the terminating action specified in paragraph (h)
of this AD.
(2) Do a detailed inspection with a borescope for cracks of the
intercostal tee clips. Repeat the inspection thereafter at intervals
not to exceed 3,000 flight cycles until accomplishment of the
terminating action specified in paragraph (h) of this AD.
(g) If any cracked structure is found during any inspection
required by this AD, and the Accomplishment Instructions of Boeing
Alert Service Bulletin 757-53A0093, dated November 8, 2006, specify
to contact Boeing for appropriate action: Before further flight,
repair any cracked structure using a method approved in accordance
with the procedures specified in paragraph (i)(2) of this AD.
Optional Terminating Action
(h) Replacing both intercostal tee clips on the left and right
sides with new tee clips in accordance with Part 3 of the
Accomplishment Instructions of Boeing Alert Service Bulletin 757-
53A0093, dated November 8, 2006, terminates the repetitive
inspections required by this AD.
Alternative Methods of Compliance (AMOCs)
(i)(1) The Manager, Seattle Aircraft Certification Office (ACO),
FAA, has the authority to approve AMOCs for this AD, if requested in
accordance with the procedures found in 14 CFR 39.19.
(2) An AMOC that provides an acceptable level of safety may be
used for any repair required by this AD, if it is approved by an
Authorized Representative for the Boeing Commercial Airplanes
Delegation Option Authorization Organization who has been authorized
by the Manager, Seattle ACO, to make those findings. For a repair
method to be approved, the repair must meet the certification basis
of the airplane, and the approval must specifically refer to this
AD.
(3) To request a different method of compliance or a different
compliance time for this AD, follow the procedures in 14 CFR 39.19.
Before using any approved AMOC on any airplane to which the AMOC
applies, notify your appropriate principal inspector (PI) in the FAA
Flight Standards District Office (FSDO), or lacking a PI, your local
FSDO.
Material Incorporated by Reference
(j) You must use Boeing Alert Service Bulletin 757-53A0093,
dated November 8, 2006, to do the actions required by this AD,
unless the AD specifies otherwise.
(1) The Director of the Federal Register approved the
incorporation by reference of this service information under 5
U.S.C. 552(a) and 1 CFR part 51.
(2) For service information identified in this AD, contact
Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington
98124-2207.
(3) You may review copies of the service information
incorporated by reference at the FAA, Transport Airplane
Directorate, 1601 Lind Avenue, SW., Renton, Washington; 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/code_of_federal_
regulations/ibr_locations.html.
Issued in Renton, Washington, on December 10, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E7-24337 Filed 12-14-07; 8:45 am]
BILLING CODE 4910-13-P
