Airworthiness Directives; General Electric Company Turbofan Engines, 21578-21580 [2013-08447]
Download as PDF
21578
Federal Register / Vol. 78, No. 70 / Thursday, April 11, 2013 / Proposed Rules
paragraph (l)(2) of this AD: Do a detailed
inspection of the cam latches and latch pins
to detect damage, distress, and incorrect
rigging; torque the cross bolts; measure the
extension of the latch pins; replace all alloy
steel bolts used as latch pin cross bolts with
corrosion resistant steel (CRES) bolts; rig the
MCD, as applicable; and do all applicable
related investigative and corrective actions,
in accordance with the Accomplishment
Instructions of Boeing Alert Service Bulletin
757–52A0091, dated March 9, 2010, except
as required by paragraph (l)(2) of this AD. Do
all applicable related investigative and
corrective actions at the applicable time
specified in paragraph 1.E., ‘‘Compliance’’ of
Boeing Alert Service Bulletin 757–52A0091,
dated March 9, 2010.
(h) Repetitive Inspections
Repeat the applicable inspections specified
in paragraph (g) of this AD, as specified in
paragraphs (h)(1), (h)(2), and (h)(3) of this
AD, at the applicable times specified in table
1 of paragraph 1.E., ‘‘Compliance,’’ of Boeing
Alert Service Bulletin 757–52A0091, dated
March 9, 2010. The inspection conditions are
defined in Boeing Alert Service Bulletin 757–
52A0091, dated March 9, 2010.
(1) For airplanes found with Inspection
Condition 5: Repeat the general visual
inspection for broken, cracked, missing, or
migrated parts of the cam latches and latch
pins.
(2) For airplanes found with Inspection
Condition 2, 4.2, or 5: Repeat the detailed
inspection for damage, distress, and incorrect
rigging of the cam latches and latch pins.
(3) For airplanes found with Inspection
Condition 5: Repeat the high frequency eddy
current or magnetic particle inspection to
detect signs of cracking of cam latches 1 and
2.
damage, distress, and incorrect rigging of the
cam latches and latch pins specified in
paragraph (i) of this AD on remaining cam
latches and cam pins at the applicable times
specified in table 2 of paragraph 1.E.,
‘‘Compliance,’’ of Boeing Alert Service
Bulletin 757–52A0091, dated March 9, 2010.
(k) Parts Installation Prohibition
As of the effective date of this AD, no
person may install an alloy steel bolt as a
cross bolt through any latch pin fitting
assembly in the lower sill of the MCD on any
airplane.
(l) Exceptions to Service Bulletin
Specifications
The following exceptions apply in this AD.
(1) Where Boeing Alert Service Bulletin
757–52A0091, dated March 9, 2010, specifies
a compliance time after the date of that
service bulletin, this AD requires compliance
within the specified compliance time after
the effective date of this AD.
(2) Where Boeing Alert Service Bulletin
757–52A0091, dated March 9, 2010, specifies
to contact Boeing for appropriate action:
Before further flight, repair the discrepancy
in accordance with a method approved by
the Manager, Seattle, Aircraft Certification
Office (ACO), FAA. 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.
TKELLEY on DSK3SPTVN1PROD with PROPOSALS
(i) MCD Post-Rigging Initial Inspections and
Related Investigative and Corrective Actions
At the applicable times specified in table
2 of paragraph 1.E., ‘‘Compliance,’’ of Boeing
Alert Service Bulletin 757–52A0091, dated
March 9, 2010: Do a general visual inspection
of the cam latches and latch pins for
discrepancies; a detailed inspection of the
cam latches and latch pins for discrepancies;
and an HFEC or magnetic particle inspection
of cam latch 1 and cam latch 2 for cracking;
and do all applicable related investigative
and corrective actions, except as required by
paragraph (l)(2) of this AD; in accordance
with the Accomplishment Instructions of
Boeing Alert Service Bulletin 757–52A0091,
dated March 9, 2010. Do all applicable
related investigative and corrective actions at
the applicable time specified in paragraph
1.E., ‘‘Compliance,’’ of Boeing Alert Service
Bulletin 757–52A0091, dated March 9, 2010.
(m) Alternative Methods of Compliance
(AMOCs)
(1) The Manager, Seattle Aircraft
Certification Office (ACO), FAA, has the
authority to approve AMOCs for this AD, if
requested using the procedures found in 14
CFR 39.19. In accordance with 14 CFR 39.19,
send your request to your principal inspector
or local Flight Standards District Office, as
appropriate. If sending information directly
to the manager of the ACO, send it to the
attention of the person identified in the
Related Information section of this AD.
Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov.
(2) Before using any approved AMOC,
notify your appropriate principal inspector,
or lacking a principal inspector, the manager
of the local flight standards district office/
certificate holding district office.
(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 the
Boeing Commercial Airplanes Organization
Designation Authorization (ODA) that 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.
(j) MCD Post-Rigging Repetitive Inspections
(1) For all airplanes: Repeat the inspections
specified in paragraph (i) of this AD, at the
applicable times specified in table 2 of
paragraph 1.E., ‘‘Compliance,’’ of Boeing
Alert Service Bulletin 757–52A0091, dated
March 9, 2010.
(2) For airplanes found with Inspection
Condition 2 as defined in Boeing Alert
Service Bulletin 757–52A0091, dated March
9, 2010: Repeat the detailed inspection for
(n) Related Information
(1) For more information about this AD,
contact Kimberly DeVoe, Aerospace
Engineer, Cabin Safety and Environmental
Systems Branch, ANM–150S, FAA, Seattle
Aircraft Certification Office, 1601 Lind
Avenue SW., Renton, WA 98057–3356;
phone: (425) 917–6495 ; fax: (425) 917–6590;
email: kimberly.devoe@faa.gov.
(2) For service information identified in
this AD, contact Boeing Commercial
VerDate Mar<15>2010
16:45 Apr 10, 2013
Jkt 229001
PO 00000
Frm 00012
Fmt 4702
Sfmt 4702
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; Internet https://
www.myboeingfleet.com. You may review
copies of the referenced 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.
Issued in Renton, Washington, on March
28, 2013.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. 2013–08450 Filed 4–10–13; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2013–0195; Directorate
Identifier 2013–NE–08–AD]
RIN 2120–AA64
Airworthiness Directives; General
Electric Company Turbofan Engines
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
We propose to adopt a new
airworthiness directive (AD) for all
General Electric Company (GE) model
GEnx-2B67 and GEnx-2B67B turbofan
engines with booster anti-ice (BAI) air
duct, part number (P/N) 2469M32G01,
and support bracket, P/N 2469M46G01,
installed. This proposed AD was
prompted by reports of cracks in the
BAI air duct. This proposed AD would
require initial and repetitive visual
inspections of the BAI air duct, removal
from service of the BAI air duct if it fails
inspection and, as a mandatory
terminating action, the installation of
new BAI air duct support brackets. We
are proposing this AD to prevent failure
of the BAI air duct, resulting in an inflight shutdown of one or more engines,
loss of thrust control, and damage to the
aircraft.
DATES: We must receive comments on
this proposed AD by June 10, 2013.
ADDRESSES: You may send comments,
using the procedures found in 14 CFR
11.43 and 11.45, by any of the following
methods:
• Federal eRulemaking Portal: Go to
https://www.regulations.gov. Follow the
instructions for submitting comments.
• Fax: 202–493–2251.
• Mail: U.S. Department of
Transportation, Docket Operations,
SUMMARY:
E:\FR\FM\11APP1.SGM
11APP1
Federal Register / Vol. 78, No. 70 / Thursday, April 11, 2013 / Proposed Rules
M–30, West Building Ground Floor,
Room W12–140, 1200 New Jersey
Avenue SE., Washington, DC 20590.
• Hand Delivery: Deliver to Mail
address above between 9 a.m. and 5
p.m., Monday through Friday, except
Federal holidays.
For service information identified in
this proposed AD, contact General
Electric, One Neumann Way, MD Y–75,
Cincinnati, OH; phone: 513–552–2913;
email: geae.aoc@ge.com; and Web site:
www.GE.com. You may view this
service information at the FAA, Engine
& Propeller Directorate, 12 New England
Executive Park, Burlington, MA. For
information on the availability of this
material at the FAA, call 781–238–7125.
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 proposed AD, the
regulatory evaluation, any comments
received, and other information. The
street address for the Docket Office
(phone: 800–647–5527) is in the
ADDRESSES section. Comments will be
available in the AD docket shortly after
receipt.
FOR FURTHER INFORMATION CONTACT:
Jason Yang, Aerospace Engineer, Engine
Certification Office, FAA, Engine &
Propeller Directorate, 12 New England
Executive Park, Burlington, MA 01803;
phone: 781–238–7747; fax: 781–238–
7199; email: Jason.Yang@faa.gov.
SUPPLEMENTARY INFORMATION:
TKELLEY on DSK3SPTVN1PROD with PROPOSALS
Comments Invited
We invite you to send any written
relevant data, views, or arguments about
this proposal. Send your comments to
an address listed under the ADDRESSES
section. Include ‘‘Docket No. FAA–
2013–0195; Directorate Identifier 2013–
NE–08–AD’’ at the beginning of your
comments. We specifically invite
comments on the overall regulatory,
economic, environmental, and energy
aspects of this proposed AD. We will
consider all comments received by the
closing date and may amend this
proposed AD because of those
comments.
We will post all comments we
receive, without change, to https://
www.regulations.gov, including any
personal information you provide. We
will also post a report summarizing each
substantive verbal contact we receive
about this proposed AD.
VerDate Mar<15>2010
16:45 Apr 10, 2013
Jkt 229001
21579
Discussion
Costs of Compliance
We propose to adopt a new AD for all
GE model GEnx-2B67 and GEnx-2B67B
turbofan engines with BAI air duct,
P/N 2469M32G01, and support bracket,
P/N 2469M46G01, installed. This
proposed AD was prompted by 11
reports of cracks in the BAI air duct,
P/N 2469M32G01, caused by resonant
vibration of the BAI valve system.
Engineering analysis determined that
the single support bracket is not
sufficient to prevent the vibration and
cracking in the BAI air duct, and that
additional support brackets are needed.
This proposed AD would require initial
visual inspection of the BAI air duct
before it reaches 400 cycles since new
(CSN), and repetitive visual inspections
every 100 cycles thereafter. If the BAI
air duct fails inspection, the proposed
AD would require removal of the BAI
air duct from service. As a mandatory
terminating action, the proposed AD
would also require installation of new
BAI air duct support brackets at the next
removal of the BAI air duct, and
replacement of the BAI air duct with a
duct eligible for installation. This
condition, if not corrected, could result
in failure of the BAI air duct, resulting
in an in-flight shutdown of one or more
engines, loss of thrust control, and
damage to the aircraft.
We estimate that this proposed AD
affects 16 engines installed on airplanes
of U.S. registry. We also estimate that it
would take about 4 hours per engine to
comply with this proposed AD. The
average labor rate is $85 per hour.
Required parts would cost about
$11,000 per engine. Based on these
figures, we estimate the cost of the
proposed AD to U.S. operators to be
$181,440.
Relevant Service Information
We reviewed GE Service Bulletin (SB)
No. GEnx-2B S/B 75–0006, dated July
23, 2012, and GE SB No. GEnx-2B S/B
75–0008, Revision 1, dated February 4,
2013. GE SB No. GEnx-2B S/B 75–0006
describes procedures for inspecting and,
if necessary, removing and replacing the
BAI air duct. GE SB No. GEnx-2B S/B
75–0008, Revision 1, describes
procedures for installing new BAI air
duct support brackets, and inspection
and possible replacement of BAI air
ducts.
FAA’s Determination
We are proposing this AD because we
evaluated all the relevant information
and determined the unsafe condition
described previously is likely to exist or
develop in other products of the same
type design.
Proposed AD Requirements
This proposed AD would require
initial and repetitive visual inspections
of the BAI air duct, replacement of the
BAI air duct if it fails inspection and, as
mandatory terminating action,
installation of new BAI air duct support
brackets.
PO 00000
Frm 00013
Fmt 4702
Sfmt 4702
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
We determined that this proposed AD
would not have federalism implications
under Executive Order 13132. This
proposed AD would 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 this proposed regulation:
(1) Is not a ‘‘significant regulatory
action’’ under Executive Order 12866,
(2) Is not a ‘‘significant rule’’ under
the DOT Regulatory Policies and
Procedures (44 FR 11034, February 26,
1979),
(3) Will not affect intrastate aviation
in Alaska to the extent that it justifies
making a regulatory distinction, and
(4) 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.
E:\FR\FM\11APP1.SGM
11APP1
21580
Federal Register / Vol. 78, No. 70 / Thursday, April 11, 2013 / Proposed Rules
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Incorporation by reference,
Safety.
The Proposed Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA proposes to amend 14 CFR part
39 as follows:
PART 39—AIRWORTHINESS
DIRECTIVES
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 adding
the following new airworthiness
directive (AD):
■
General Electric Company: Docket No. FAA–
2013–0195; Directorate Identifier 2013–
NE–08–AD.
(a) Comments Due Date
We must receive comments by June 10,
2013.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all General Electric
Company (GE) model GEnx-2B67 and GEnx2B67B turbofan engines with booster anti-ice
(BAI) air duct, part number (P/N)
2469M32G01, and support bracket, P/N
2469M46G01, installed.
(d) Unsafe Condition
This AD was prompted by reports of cracks
in the BAI air duct, P/N 2469M32G01. We are
issuing this AD to prevent failure of the BAI
air duct, resulting in an in-flight shutdown of
one or more engines, loss of thrust control,
and damage to the aircraft.
(e) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
TKELLEY on DSK3SPTVN1PROD with PROPOSALS
(f) Inspection of BAI Air Duct
(1) Perform an initial visual inspection of
the BAI air duct, P/N 2469M32G01, for
cracks prior to accumulating 400 cycles since
new (CSN).
(2) Thereafter, repeat the visual inspection
within every 100 cycles since last inspection.
(3) If cracks in the BAI air duct are found
during any inspection required by this AD,
remove the BAI air duct from service.
(g) Mandatory Terminating Action
As mandatory terminating action to the
repetitive inspection requirement of this AD,
at the next removal of BAI air duct, P/N
2469M32G01, or if the BAI air duct is found
cracked, after the effective date of this AD,
do the following:
(1) Install new BAI air duct support
brackets, P/Ns 2550M03G01, 2548M66G01,
VerDate Mar<15>2010
16:45 Apr 10, 2013
Jkt 229001
2548M67P01, 2550M18G01, and
2550M17P01.
(2) Replace the BAI air duct with one that
is eligible for installation.
(h) Definitions
For the purpose of this AD, a BAI air duct
that is eligible for installation is one that has
accumulated 25 CSN or fewer.
(i) Alternative Methods of Compliance
(AMOCs)
The Manager, Engine Certification Office,
FAA, may approve AMOCs for this AD. Use
the procedures found in 14 CFR 39.19 to
make your request.
(j) Related Information
(1) For more information about this AD,
contact Jason Yang, Aerospace Engineer,
Engine Certification Office, FAA, Engine &
Propeller Directorate, 12 New England
Executive Park, Burlington, MA 01803;
phone: 781–238–7747; fax: 781–238–7199;
email: Jason.Yang@faa.gov.
(2) Refer to GE Service Bulletin (SB) No.
GEnx-2B S/B 75–0006, dated July 23, 2012,
and GE SB No. GEnx-2B S/B 75–0008,
Revision 1, dated February 4, 2013, for
guidance on inspecting and, if necessary,
removing and replacing the BAI air duct, as
well as procedures for installation of new
BAI air duct support brackets.
(3) For service information identified in
this proposed AD, contact General Electric,
One Neumann Way, MD Y–75, Cincinnati,
OH; phone: 513–552–2913; email:
geae.aoc@ge.com; and Web site:
www.GE.com. You may view this service
information at the FAA, Engine & Propeller
Directorate, 12 New England Executive Park,
Burlington, MA. For information on the
availability of this material at the FAA, call
781–238–7125.
Issued in Burlington, Massachusetts, on
April 4, 2013.
Robert J. Ganley,
Acting Assistant Manager, Engine & Propeller
Directorate, Aircraft Certification Service.
[FR Doc. 2013–08447 Filed 4–10–13; 8:45 am]
BILLING CODE 4910–13–P
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 52
[EPA–R09–OAR–2013–0103; FRL–9794–3]
Revisions to the California State
Implementation Plan, Santa Barbara
and San Diego County Air Pollution
Control Districts
Environmental Protection
Agency (EPA).
ACTION: Proposed rule.
AGENCY:
EPA is proposing to approve
revisions to the Santa Barbara County
Air Pollution Control District
(SBCAPCD) and San Diego County Air
Pollution Control District (SDCAPCD)
SUMMARY:
PO 00000
Frm 00014
Fmt 4702
Sfmt 4702
portions of the California State
Implementation Plan (SIP). These
revisions concern volatile organic
compound (VOC) emissions from
surface coating of aerospace vehicles
and components and from wood
products coating operations. We are
proposing to approve local rules to
regulate these emission sources under
the Clean Air Act as amended in 1990
(CAA or the Act).
DATES: Any comments on this proposal
must arrive by May 13, 2013.
ADDRESSES: Submit comments,
identified by docket number EPA–R09–
OAR–2013–0103, by one of the
following methods:
1. Federal eRulemaking Portal:
www.regulations.gov. Follow the on-line
instructions.
2. Email: steckel.andrew@epa.gov.
3. Mail or deliver: Andrew Steckel
(Air–4), U.S. Environmental Protection
Agency Region IX, 75 Hawthorne Street,
San Francisco, CA 94105–3901.
Instructions: All comments will be
included in the public docket without
change and may be made available
online at www.regulations.gov,
including any personal information
provided, unless the comment includes
Confidential Business Information (CBI)
or other information whose disclosure is
restricted by statute. Information that
you consider CBI or otherwise protected
should be clearly identified as such and
should not be submitted through
www.regulations.gov or email.
www.regulations.gov is an ‘‘anonymous
access’’ system, and EPA will not know
your identity or contact information
unless you provide it in the body of
your comment. If you send email
directly to EPA, your email address will
be automatically captured and included
as part of the public comment. If EPA
cannot read your comment due to
technical difficulties and cannot contact
you for clarification, EPA may not be
able to consider your comment.
Electronic files should avoid the use of
special characters, any form of
encryption, and be free of any defects or
viruses.
Docket: Generally, documents in the
docket for this action are available
electronically at www.regulations.gov
and in hard copy at EPA Region IX, 75
Hawthorne Street, San Francisco,
California. While all documents in the
docket are listed at
www.regulations.gov, some information
may be publicly available only at the
hard copy location (e.g., copyrighted
material, large maps), and some may not
be publicly available in either location
(e.g., CBI). To inspect the hard copy
materials, please schedule an
E:\FR\FM\11APP1.SGM
11APP1
Agencies
[Federal Register Volume 78, Number 70 (Thursday, April 11, 2013)]
[Proposed Rules]
[Pages 21578-21580]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2013-08447]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2013-0195; Directorate Identifier 2013-NE-08-AD]
RIN 2120-AA64
Airworthiness Directives; General Electric Company Turbofan
Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: We propose to adopt a new airworthiness directive (AD) for all
General Electric Company (GE) model GEnx-2B67 and GEnx-2B67B turbofan
engines with booster anti-ice (BAI) air duct, part number (P/N)
2469M32G01, and support bracket, P/N 2469M46G01, installed. This
proposed AD was prompted by reports of cracks in the BAI air duct. This
proposed AD would require initial and repetitive visual inspections of
the BAI air duct, removal from service of the BAI air duct if it fails
inspection and, as a mandatory terminating action, the installation of
new BAI air duct support brackets. We are proposing this AD to prevent
failure of the BAI air duct, resulting in an in-flight shutdown of one
or more engines, loss of thrust control, and damage to the aircraft.
DATES: We must receive comments on this proposed AD by June 10, 2013.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments.
Fax: 202-493-2251.
Mail: U.S. Department of Transportation, Docket
Operations,
[[Page 21579]]
M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue
SE., Washington, DC 20590.
Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
For service information identified in this proposed AD, contact
General Electric, One Neumann Way, MD Y-75, Cincinnati, OH; phone: 513-
552-2913; email: geae.aoc@ge.com; and Web site: www.GE.com. You may
view this service information at the FAA, Engine & Propeller
Directorate, 12 New England Executive Park, Burlington, MA. For
information on the availability of this material at the FAA, call 781-
238-7125.
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 proposed AD, the regulatory
evaluation, any comments received, and other information. The street
address for the Docket Office (phone: 800-647-5527) is in the ADDRESSES
section. Comments will be available in the AD docket shortly after
receipt.
FOR FURTHER INFORMATION CONTACT: Jason Yang, Aerospace Engineer, Engine
Certification Office, FAA, Engine & Propeller Directorate, 12 New
England Executive Park, Burlington, MA 01803; phone: 781-238-7747; fax:
781-238-7199; email: Jason.Yang@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under the ADDRESSES section. Include ``Docket No. FAA-2013-0195;
Directorate Identifier 2013-NE-08-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD because of those comments.
We will post all comments we receive, without change, to https://www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.
Discussion
We propose to adopt a new AD for all GE model GEnx-2B67 and GEnx-
2B67B turbofan engines with BAI air duct, P/N 2469M32G01, and support
bracket, P/N 2469M46G01, installed. This proposed AD was prompted by 11
reports of cracks in the BAI air duct, P/N 2469M32G01, caused by
resonant vibration of the BAI valve system. Engineering analysis
determined that the single support bracket is not sufficient to prevent
the vibration and cracking in the BAI air duct, and that additional
support brackets are needed. This proposed AD would require initial
visual inspection of the BAI air duct before it reaches 400 cycles
since new (CSN), and repetitive visual inspections every 100 cycles
thereafter. If the BAI air duct fails inspection, the proposed AD would
require removal of the BAI air duct from service. As a mandatory
terminating action, the proposed AD would also require installation of
new BAI air duct support brackets at the next removal of the BAI air
duct, and replacement of the BAI air duct with a duct eligible for
installation. This condition, if not corrected, could result in failure
of the BAI air duct, resulting in an in-flight shutdown of one or more
engines, loss of thrust control, and damage to the aircraft.
Relevant Service Information
We reviewed GE Service Bulletin (SB) No. GEnx-2B S/B 75-0006, dated
July 23, 2012, and GE SB No. GEnx-2B S/B 75-0008, Revision 1, dated
February 4, 2013. GE SB No. GEnx-2B S/B 75-0006 describes procedures
for inspecting and, if necessary, removing and replacing the BAI air
duct. GE SB No. GEnx-2B S/B 75-0008, Revision 1, describes procedures
for installing new BAI air duct support brackets, and inspection and
possible replacement of BAI air ducts.
FAA's Determination
We are proposing this AD because we evaluated all the relevant
information and determined the unsafe condition described previously is
likely to exist or develop in other products of the same type design.
Proposed AD Requirements
This proposed AD would require initial and repetitive visual
inspections of the BAI air duct, replacement of the BAI air duct if it
fails inspection and, as mandatory terminating action, installation of
new BAI air duct support brackets.
Costs of Compliance
We estimate that this proposed AD affects 16 engines installed on
airplanes of U.S. registry. We also estimate that it would take about 4
hours per engine to comply with this proposed AD. The average labor
rate is $85 per hour. Required parts would cost about $11,000 per
engine. Based on these figures, we estimate the cost of the proposed AD
to U.S. operators to be $181,440.
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
We determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would 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 this proposed
regulation:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979),
(3) Will not affect intrastate aviation in Alaska to the extent
that it justifies making a regulatory distinction, and
(4) 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.
[[Page 21580]]
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Proposed Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 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 airworthiness
directive (AD):
General Electric Company: Docket No. FAA-2013-0195; Directorate
Identifier 2013-NE-08-AD.
(a) Comments Due Date
We must receive comments by June 10, 2013.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all General Electric Company (GE) model GEnx-
2B67 and GEnx-2B67B turbofan engines with booster anti-ice (BAI) air
duct, part number (P/N) 2469M32G01, and support bracket, P/N
2469M46G01, installed.
(d) Unsafe Condition
This AD was prompted by reports of cracks in the BAI air duct,
P/N 2469M32G01. We are issuing this AD to prevent failure of the BAI
air duct, resulting in an in-flight shutdown of one or more engines,
loss of thrust control, and damage to the aircraft.
(e) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(f) Inspection of BAI Air Duct
(1) Perform an initial visual inspection of the BAI air duct, P/
N 2469M32G01, for cracks prior to accumulating 400 cycles since new
(CSN).
(2) Thereafter, repeat the visual inspection within every 100
cycles since last inspection.
(3) If cracks in the BAI air duct are found during any
inspection required by this AD, remove the BAI air duct from
service.
(g) Mandatory Terminating Action
As mandatory terminating action to the repetitive inspection
requirement of this AD, at the next removal of BAI air duct, P/N
2469M32G01, or if the BAI air duct is found cracked, after the
effective date of this AD, do the following:
(1) Install new BAI air duct support brackets, P/Ns 2550M03G01,
2548M66G01, 2548M67P01, 2550M18G01, and 2550M17P01.
(2) Replace the BAI air duct with one that is eligible for
installation.
(h) Definitions
For the purpose of this AD, a BAI air duct that is eligible for
installation is one that has accumulated 25 CSN or fewer.
(i) Alternative Methods of Compliance (AMOCs)
The Manager, Engine Certification Office, FAA, may approve AMOCs
for this AD. Use the procedures found in 14 CFR 39.19 to make your
request.
(j) Related Information
(1) For more information about this AD, contact Jason Yang,
Aerospace Engineer, Engine Certification Office, FAA, Engine &
Propeller Directorate, 12 New England Executive Park, Burlington, MA
01803; phone: 781-238-7747; fax: 781-238-7199; email:
Jason.Yang@faa.gov.
(2) Refer to GE Service Bulletin (SB) No. GEnx-2B S/B 75-0006,
dated July 23, 2012, and GE SB No. GEnx-2B S/B 75-0008, Revision 1,
dated February 4, 2013, for guidance on inspecting and, if
necessary, removing and replacing the BAI air duct, as well as
procedures for installation of new BAI air duct support brackets.
(3) For service information identified in this proposed AD,
contact General Electric, One Neumann Way, MD Y-75, Cincinnati, OH;
phone: 513-552-2913; email: geae.aoc@ge.com; and Web site:
www.GE.com. You may view this service information at the FAA, Engine
& Propeller Directorate, 12 New England Executive Park, Burlington,
MA. For information on the availability of this material at the FAA,
call 781-238-7125.
Issued in Burlington, Massachusetts, on April 4, 2013.
Robert J. Ganley,
Acting Assistant Manager, Engine & Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 2013-08447 Filed 4-10-13; 8:45 am]
BILLING CODE 4910-13-P