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[Federal Register Volume 76, Number 68 (Friday, April 8, 2011)]
[Proposed Rules]
[Pages 19710-19714]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-8407]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2011-0304; Directorate Identifier 2010-NM-103-AD]
RIN 2120-AA64

Airworthiness Directives; The Boeing Company Model 757 Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The FAA proposes to supersede an existing airworthiness 
directive (AD) that applies to all Model 757 airplanes. The existing AD 
currently requires revising the Airworthiness Limitations (AWLs) 
section of the Instructions for Continued Airworthiness by 
incorporating new limitations for fuel tank systems to satisfy Special 
Federal Aviation Regulation No. 88 requirements. That AD also requires 
the initial inspection of certain repetitive AWL inspections to phase-
in those inspections, and repair if necessary. This proposed AD would 
require actions that were provided previously as optional actions, and 
would require a certain initial inspection to be accomplished for a 
revised AWL. This proposed AD results from a report that an AWL 
required by the existing AD must be revised. We are proposing this AD 
to prevent the potential for ignition sources inside fuel tanks caused 
by latent failures, alterations, repairs, or maintenance actions, 
which, in combination with flammable fuel vapors, could result in a 
fuel tank explosion and consequent loss of the airplane.

DATES: We must receive comments on this proposed AD by May 23, 2011.

[[Page 19711]]

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to 
http:[sol][sol]www.regulations.gov. Follow the instructions for 
submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue, SE., Washington, DC 20590.
     Hand Delivery: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays.
    For service information identified in this proposed 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:[sol][sol]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.

Examining the AD Docket

    You may examine the AD docket on the Internet at 
http:[sol][sol]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 (telephone 800-647-5527) is in 
the ADDRESSES section. Comments will be available in the AD docket 
shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Tak Kobayashi, Aerospace Engineer, 
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification 
Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; phone: 
425-917-6499; fax: 425-917-6590; e-mail: takahisa.kobayashi@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2011-0304; 
Directorate Identifier 2010-NM-103-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 
http:[sol][sol]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

    On April 29, 2008, we issued AD 2008-10-11, amendment 39-15517 (73 
FR 25974, May 8, 2008), for all Model 757 series airplanes. That AD 
requires revising the Airworthiness Limitations (AWLs) section of the 
Instructions for Continued Airworthiness by incorporating new 
limitations for fuel tank systems to satisfy Special Federal Aviation 
Regulation No. 88 requirements. That AD also requires the initial 
inspection of certain repetitive AWL inspections to phase-in those 
inspections, and repair if necessary. That AD resulted from a design 
review of the fuel tank systems. We issued that AD to prevent the 
potential for ignition sources inside fuel tanks caused by latent 
failures, alterations, repairs, or maintenance actions, which, in 
combination with flammable fuel vapors, could result in a fuel tank 
explosion and consequent loss of the airplane.

Actions Since Existing AD Was Issued

    Since we issued AD 2008-10-11, we received a report from the 
manufacturer that AWL No. 28-AWL-03, as specified in Boeing Temporary 
Revision (TR) 09-008, dated March 2008, contained incorrect 
information. Boeing TR 09-008 was published as Section 9 of the Boeing 
757 Maintenance Planning Data (MPD) Document, D622N001-9, Revision 
March 2008, and was referenced by AD 2008-10-11. Use of that AWL may 
result in not detecting defects in the fuel quantity indicating system 
(FQIS) wiring shield. Boeing issued Boeing TR 09-010, dated July 2010, 
which was published as Section 9 of the Boeing 757 MPD Document, 
D622N001-9, Revision July 2010. That document also revises other AWLs 
referenced by AD 2008-10-11.
    Since we issued that AD, we have also determined that it is 
necessary to clarify the AD's intended effect on spare and on-airplane 
fuel tank system components, regarding the use of maintenance manuals 
and instructions for continued airworthiness.
    Section 91.403(c) of the Federal Aviation Regulations (14 CFR 
91.403(c)) specifies the following:

    No person may operate an aircraft for which a manufacturer's 
maintenance manual or instructions for continued airworthiness has 
been issued that contains an airworthiness limitation section unless 
the mandatory * * * procedures * * * have been complied with.

Critical design configuration control limitations (CDCCLs) are 
airworthiness limitation requirements to preserve a critical ignition 
source prevention feature of the fuel tank system design that is 
necessary to prevent the occurrence of an unsafe condition. The purpose 
of a CDCCL is to provide instruction to retain the critical ignition 
source prevention feature during configuration changes that may be 
caused by alterations, repairs, or maintenance actions. A CDCCL is not 
a periodic inspection.
    Some operators have questioned whether existing components affected 
by the new CDCCLs must be reworked. We did not intend for the AD to 
retroactively require rework of components that had been maintained 
using acceptable methods before the effective date of the AD. Owners 
and operators of the affected airplanes therefore are not required to 
rework affected components identified as airworthy or installed on the 
affected airplanes before the required revisions of the maintenance 
program. But once the CDCCLs are incorporated into the maintenance 
program, future maintenance actions on components must be done in 
accordance with those CDCCLs.

Explanation of Changes to AD 2008-10-11

    AD 2008-10-11 allowed the inclusion of AWLs No. 28-AWL-25 and 28-
AWL-26 as an optional action. We have determined that those AWLs must 
be required. We have added that requirement in paragraph (l) of this 
proposed AD to require those AWLs and paragraphs (n) and (o) of this 
proposed AD to clarify the required compliance times for those AWLs.
    We have removed the ``Service Information'' reference paragraph 
from this proposed AD. That paragraph was identified as paragraph (f) 
in AD 2008-10-11. Instead, we have provided the full service 
information citations throughout this NPRM.
    AD 2008-10-11 allowed the use of alternative inspections, 
intervals, or CDCCLs if they are part of a later revision of Boeing TR 
09-008, dated

[[Page 19712]]

March 2008, to Section 9 of the Boeing 757 MPD Document, D622N001-9. AD 
2008-10-11 also allowed the use of later revisions of Section 9 of the 
Boeing 757 MPD Document, D622N001-9. Those provisions have been removed 
from this proposed AD. We have removed the references to ``a later 
revision'' or ``later FAA-approved revisions'' of specific service 
documents to be consistent with FAA policy and with Office of the 
Federal Register regulations for approving materials that are 
incorporated by reference. Affected operators, however, may request 
approval to use a later revision or an alternative CDCCL, inspection, 
or interval that is part of a later revision of the referenced service 
documents as an alternative method of compliance, under the provisions 
of paragraph (u) of this AD.

FAA's Determination and Requirements of the Proposed AD

    We have evaluated all pertinent information and identified an 
unsafe condition that is likely to develop on other airplanes of the 
same type design. For this reason, we are proposing this AD, which 
would supersede AD 2008-10-11 and would retain the requirements of the 
existing AD with revised service information. This proposed AD would 
also require actions that were previously provided as optional actions 
in the existing AD.

Costs of Compliance

    There are about 990 airplanes of the affected design in the 
worldwide fleet. The following table provides the estimated costs for 
U.S. operators to comply with this proposed AD.

                                                                     Estimated Costs
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                    Number of U.S.-
                       Action                             Work hours      Average labor rate   Cost per airplane      registered          Fleet cost
                                                                               per hour                                airplanes
--------------------------------------------------------------------------------------------------------------------------------------------------------
AWLs revision (required by AD 2008-10-11)...........                   8                 $85                $680                 639            $434,520
Inspections (required by AD 2008-10-11).............                   8                  85                 680                 639             434,520
AWLs revision (new proposed action).................                   1                  85                  85                 639              54,315
--------------------------------------------------------------------------------------------------------------------------------------------------------

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 have 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 that the 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); and
    (3) Will not affect intrastate aviation in Alaska, 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.

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.

Sec.  39.13  [Amended]

    2. The FAA amends Sec.  39.13 by removing amendment 39-15517 (73 FR 
25974, May 8, 2008) and adding the following new AD:

The Boeing Company: Docket No. FAA-2011-0304; Directorate Identifier 
2010-NM-103-AD.

Comments Due Date

    (a) The FAA must receive comments on this AD action by May 23, 
2011.

Affected ADs

    (b) This AD supersedes AD 2008-10-11, Amendment 39-15517. 
Certain requirements of this AD terminate certain requirements of AD 
2008-11-07, Amendment 39-15529; AD 2008-06-03, Amendment 39-15415; 
and AD 2009-06-20, Amendment 39-15857.

Applicability

    (c) This AD applies to all The Boeing Company Model 757-200, -
200PF, -200CB, and -300 series airplanes, certificated in any 
category.

    Note 1:  This AD requires revisions to certain operator 
maintenance documents to include new actions (e.g., inspections) 
and/or Critical Design Configuration Control Limitations (CDCCLs). 
Compliance with these actions and/or CDCCLs is required by 14 CFR 
91.403(c). For airplanes that have been previously modified, 
altered, or repaired in the areas addressed by these inspections, 
the operator may not be able to accomplish the actions described in 
the revisions. In this situation, to comply with 14 CFR 91.403(c), 
the operator must request approval of an alternative method of 
compliance (AMOC) according to paragraph (u) of this AD. The request 
should include a description of changes to the required actions that 
will ensure the continued operational safety of the airplane.

Subject

    (d) Air Transport Association (ATA) of America Code 28: Fuel.

Unsafe Condition

    (e) This AD results from a design review of the fuel tank 
systems. The Federal Aviation Administration is issuing this AD to 
prevent the potential for ignition sources inside fuel tanks caused 
by latent failures, alterations, repairs, or maintenance actions, 
which, in combination with flammable fuel

[[Page 19713]]

vapors, could result in a fuel tank explosion and consequent loss of 
the airplane.

Compliance

    (f) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Restatement of Requirements of AD 2008-10-11, With Revised Service 
Information

Revision of Airworthiness Limitations (AWLs) Section

    (g) Before December 16, 2008, revise the AWLs section of the 
Instructions for Continued Airworthiness (ICA) by incorporating the 
information in the subsections specified in paragraphs (g)(1) 
through (g)(3) of this AD into the MPD; except that the initial 
inspections specified in Table 1 of this AD must be done at the 
compliance times specified in Table 1. Accomplishing the 
requirements of paragraph (l) of this AD terminates the requirements 
of this paragraph.
    (1) Subsection E, ``AIRWORTHINESS LIMITATIONS--FUEL SYSTEMS,'' 
of Boeing Temporary Revision (TR) 09-008, dated March 2008, to 
Section 9 of the Boeing 757 Maintenance Planning Data (MPD) 
Document, D622N001-9.
    (2) Subsection F, ``PAGE FORMAT: SYSTEMS AIRWORTHINESS 
LIMITATIONS,'' of Boeing TR 09-008, dated March 2008, to Section 9 
of the Boeing 757 MPD Document, D622N001-9.
    (3) Subsection G, ``AIRWORTHINESS LIMITATIONS--FUEL SYSTEM 
AWLs,'' AWLs No. 28-AWL-01 through No. 28-AWL-24 inclusive, of 
Boeing TR 09-008, dated March 2008, to Section 9 of the Boeing 757 
MPD Document, D622N001-9. As an optional action, AWLs No. 28-AWL-25 
and No. 28-AWL-26, as identified in Subsection G of Boeing TR 09-
008, dated March 2008, to Section 9 of the Boeing 757 MPD Document, 
D622N001-9, also may be incorporated into the AWLs section of the 
ICA.

Initial Inspections and Repair

    (h) Do the inspections specified in Table 1 of this AD at the 
compliance time identified in Table 1 of this AD, and repair any 
discrepancy, in accordance with Subsection G of Boeing TR 09-008, 
dated March 2008, or Boeing TR 09-010, dated July 2010, to Section 9 
of the Boeing 757 MPD Document, D622N001-9, except as required by 
paragraph (m) of this AD. The repair must be done before further 
flight. Accomplishing the inspections identified in Table 1 of this 
AD as part of a maintenance program before the applicable compliance 
time specified in Table 1 of this AD constitutes compliance with the 
requirements of this paragraph. After the effective date of this AD, 
only Boeing TR 09-010, dated July 2010, to Section 9 of the Boeing 
757 Maintenance Planning Data (MPD) Document, D622N001-9, may be 
used.

                                          Table 1--Initial Inspections
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                                                               Compliance time (whichever occurs later)
           AWL No.                  Description      -----------------------------------------------------------
                                                             Threshold                   Grace period
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(1) 28-AWL-01...............  A detailed inspection   Within 120 months       Within 72 months after June 12,
                               of external wires       since the date of       2008 (the effective date of AD
                               over the center fuel    issuance of the         2008-10-11).
                               tank for damaged        original standard
                               clamps, wire chafing,   airworthiness
                               and wire bundles in     certificate or the
                               contact with the        date of issuance of
                               surface of the center   the original export
                               fuel tank.              certificate of
                                                       airworthiness.
(2) 28-AWL-03...............  A special detailed      Within 120 months       Within 24 months after June 12,
                               inspection of the       since the date of       2008.
                               lightning shield to     issuance of the
                               ground termination on   original standard
                               the out-of-tank fuel    airworthiness
                               quantity indicating     certificate or the
                               system to verify        date of issuance of
                               functional integrity.   the original export
                                                       certificate of
                                                       airworthiness.
(3) 28-AWL-14...............  A special detailed      Within 120 months       Within 60 months after June 12,
                               inspection of the       since the date of       2008.
                               fault current bond of   issuance of the
                               the fueling shutoff     original standard
                               valve actuator of the   airworthiness
                               center wing tank to     certificate or the
                               verify electrical       date of issuance of
                               bond.                   the original export
                                                       certificate of
                                                       airworthiness.
----------------------------------------------------------------------------------------------------------------

    Note 2:  For the purposes of this AD, a detailed inspection is: 
``An intensive examination of a specific item, installation, or 
assembly to detect damage, failure, or irregularity. Available 
lighting is normally supplemented with a direct source of good 
lighting at an intensity deemed appropriate. Inspection aids such as 
mirror, magnifying lenses, etc., may be necessary. Surface cleaning 
and elaborate procedures may be required.''

    Note 3:  For the purposes of this AD, a special detailed 
inspection is: ``An intensive examination of a specific item, 
installation, or assembly to detect damage, failure, or 
irregularity. The examination is likely to make extensive use of 
specialized inspection techniques and/or equipment. Intricate 
cleaning and substantial access or disassembly procedure may be 
required.''

No Alternative Inspections, Inspection Intervals, or CDCCLs

    (i) After accomplishing the actions specified in paragraphs (g) 
and (h) of this AD, no alternative inspections, inspection 
intervals, or CDCCLs may be used unless the inspections, intervals, 
or CDCCLs are approved as an AMOC in accordance with the procedures 
specified in paragraph (u) of this AD.

Credit for Actions Done According to Previous Revisions of the MPD

    (j) Actions done before June 12, 2008, in accordance with 
Section 9 of the Boeing 757 MPD Document, D622N001-9, Revision March 
2006; Revision October 2006; Revision January 2007; or Revision 
November 2007; are acceptable for compliance with the corresponding 
requirements of paragraphs (g) and (h) of this AD.

Terminating Action for AD 2008-06-03, Amendment 39-15415

    (k) Incorporating AWLs No. 28-AWL-23, No. 28-AWL-24, and No. 28-
AWL-25 into the AWLs section of the ICA in accordance with paragraph 
(g)(3) of this AD or the maintenance program in accordance with 
paragraph (l)(3) of this AD terminates the action required by 
paragraph (h)(2) of AD 2008-06-03. After the effective date of this 
AD, only paragraph (l)(3) of this AD may be used.

New Requirements of This AD

Revision of Airworthiness Limitations (AWLs) Section

    (l) Within 6 months after the effective date of this AD, revise 
the maintenance program by incorporating the information in the 
subsections specified in paragraphs (l)(1) through (l)(3) of this 
AD. Accomplishing the actions required by this paragraph terminates 
the requirements of paragraph (g) of this AD.
    (1) Subsection E, ``AIRWORTHINESS LIMITATIONS--FUEL SYSTEMS,'' 
of Boeing TR 09-010, dated July 2010, to Section 9 of the Boeing 757 
MPD Document, D622N001-9.
    (2) Subsection F, ``PAGE FORMAT: FUEL SYSTEMS AIRWORTHINESS 
LIMITATIONS,'' of Boeing TR 09-010, dated July 2010, to Section 9 of 
the Boeing 757 MPD Document, D622N001-9.
    (3) Subsection G, ``AIRWORTHINESS LIMITATIONS--FUEL SYSTEM 
AWLs,'' AWLs No. 28-AWL-01 through No. 28-AWL-26 inclusive, of 
Boeing TR 09-010, dated July 2010, to Section 9 of the Boeing 757 
MPD Document, D622N001-9.

[[Page 19714]]

Compliance Time for AWL No. 28-AWL-03

    (m) The initial compliance time for AWL No. 28-AWL-03 of Boeing 
TR 09-010, dated July 2010, to Section 9 of Boeing 757 MPD Document, 
D622N001-9, is within 120 months since the date of issuance of the 
original standard airworthiness certificate or the date of issuance 
of the original export certificate of airworthiness, or within 24 
months after the effective date of this AD, whichever occurs later. 
Accomplishing the actions required by this paragraph terminates the 
requirements of paragraph (h)(2) of this AD.

Initial Inspection Compliance Times for AWL No. 28-AWL-25 and 28-AWL-26

    (n) The initial inspection compliance time for AWL No. 28-AWL-25 
of Boeing TR 09-010, dated July 2010, to Section 9 of Boeing 757 MPD 
Document, D622N001-9, is within 72 months after accomplishing Boeing 
Service Bulletin 757-28A0088.
    (o) The initial inspection compliance time for AWL No. 28-AWL-26 
of Boeing TR 09-010, dated July 2010, to Section 9 of Boeing 757 MPD 
Document, D622N001-9, is within 12 months after accomplishing Boeing 
Service Bulletin 757-28A0105.

No Alternative Inspections, Inspection Intervals, or CDCCLs

    (p) After accomplishing the actions specified in paragraph (l) 
of this AD, no alternative inspections, inspection intervals, or 
CDCCLs may be used unless the inspections, intervals, or CDCCLs are 
approved as an AMOC in accordance with the procedures specified in 
paragraph (u) of this AD.

Terminating Action for AD 2008-11-07, Amendment 39-15529

    (q) Incorporating AWLs No. 28-AWL-20 and No. 28-AWL-26 into the 
maintenance program in accordance with paragraph (l)(3) of this AD 
terminates the actions required by paragraphs (j) and (m) of AD 
2008-11-07.

Terminating Action for AD 2009-06-20, Amendment 39-15857

    (r) Incorporating AWL No. 28-AWL-22 into the maintenance program 
in accordance with paragraph (l)(3) of this AD terminates the 
actions required by paragraph (h) of AD 2009-06-20.

Credit for Actions Accomplished in Accordance With Previous Service 
Information

    (s) Actions done before the effective date of this AD in 
accordance with Section 9 of the Boeing 757 MPD Document, D622N001-
9, Revision December 2008, is acceptable for compliance with the 
corresponding requirements of this AD.
    (t) Actions done before the effective date of this AD in 
accordance with Subsection G of Boeing TR 09-008, dated March 2008, 
to Section 9 of the Boeing 757 MPD Document, D622N001-9, is 
acceptable for compliance with the requirements of paragraphs (n) 
and (o) of this AD.

Explanation of CDCCL Requirements

    Note 4:  Notwithstanding any other maintenance or operational 
requirements, components that have been identified as airworthy or 
installed on the affected airplanes before the revision of the 
maintenance program, as required by paragraphs (g) and (l) of this 
AD, do not need to be reworked in accordance with the CDCCLs. 
However, once the maintenance program has been revised, future 
maintenance actions on these components must be done in accordance 
with the CDCCLs.

Alternative Methods of Compliance (AMOCs)

    (u)(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 e-mailed to: 9-ANM-Seattle-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) AMOCs approved previously for AD 2008-10-11 are approved as 
AMOCs for the corresponding provisions of this AD.

Related Information

    (v) For more information about this AD, contact Tak Kobayashi, 
Aerospace Engineer, Propulsion Branch, ANM-140S, FAA, Seattle ACO, 
1601 Lind Avenue, SW., Renton, Washington 98057-3356; phone: 425-
917-6499; fax: 425-917-6590; e-mail: takahisa.kobayashi@faa.gov.
    (w) 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. 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 25, 2011.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2011-8407 Filed 4-7-11; 8:45 am]
BILLING CODE 4910-13-P
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