[Federal Register Volume 76, Number 76 (Wednesday, April 20, 2011)]
[Proposed Rules]
[Pages 22059-22064]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2011-9524]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2011-0382; Directorate Identifier 2010-NM-063-AD]
RIN 2120-AA64


Airworthiness Directives; The Boeing Company Model 757 Airplanes, 
and Model 767-200, 767-300, and 767-300F Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to supersede an existing airworthiness directive 
(AD) that applies to the products listed above. The existing AD 
currently requires revising the Limitations section of the airplane 
flight manual (AFM) to advise the flight crew of procedures to follow 
to ensure that a fuel filter impending bypass condition due to gross 
fuel contamination is detected in a timely manner. Since we issued that 
AD, a new design change has been developed that will correct an error 
in the operating program software (OPS) of the engine indication and 
crew alerting system (EICAS). This proposed AD would require installing 
new OPS (Version 7) of the EICAS in the EICAS computers. This proposed 
AD would also require various concurrent actions, depending on the 
airplane configuration, including installing a certain EICAS OPS 
version, making wiring changes, replacing the audio accessory unit, 
replacing certain handsets and EICAS computers, changing EICAS computer 
connector keying, and loading Operational Program Configuration (OPC) 
software. This proposed AD also retains the existing AD provision that 
relieves certain airplanes (those equipped with certain EICAS OPS 
versions) from the proposed requirements. Accomplishment of the new 
proposed actions would terminate the requirements of the existing AD. 
We are proposing this AD to prevent malfunction and thrust loss on both 
engines, which could result in a forced off-airport landing.

DATES: We must receive comments on this proposed AD by June 6, 2011.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-

[[Page 22060]]

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 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 [email protected]; 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.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://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: Christopher Shams, Aerospace Engineer, 
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification Office 
(ACO), 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone 
425-917-6753; fax 425-917-6590; e-mail: [email protected].

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-2011-0382; 
Directorate Identifier 2010-NM-063-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://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 14, 2008, we issued AD 2008-09-07, Amendment 39-15488 (73 
FR 21811, April 23, 2008), for all Boeing Model 757 airplanes and Model 
767-200, 767-300, and 767-300F series airplanes. That AD requires 
revising the Limitations section of the airplane flight manual (AFM) to 
advise the flight crew of procedures to follow to ensure that a fuel 
filter impending bypass condition due to gross fuel contamination is 
detected in a timely manner. That AD was prompted by an error in 
Version 6 of the operating program software (OPS) of the engine 
indication and crew alerting system (EICAS). The error prevents the 
display of an advisory message to the flight crew of a left engine fuel 
filter contamination and imminent bypass condition, which may indicate 
an imminent multiple engine thrust loss or engine malfunction event due 
to fuel contamination. We issued that AD to prevent malfunction and 
thrust loss on both engines, which could result in a forced off-airport 
landing.

Actions Since Existing AD Was Issued

    AD 2008-09-07 requires interim crew actions, via AFM limitations, 
to mitigate the unsafe condition introduced by Version 6 of the OPS. 
Since we issued that AD, Boeing has developed OPS Version 7, which 
corrects an error in the OPS of the EICAS and will allow removal of the 
required AFM limitations.

Relevant Service Information

    We have reviewed Boeing Special Attention Service Bulletins 757-31-
0192 (for Model 757 airplanes) and 767-31-0267 (for Model 767-200, -
300, -300F series airplanes), both dated September 11, 2009. The 
service bulletins describe procedures for installing new EICAS OPS in 
the left and right EICAS computers.
    Service Bulletin 757-31-0192 specifies the concurrent 
accomplishment of the actions specified in Boeing Service Bulletins 
757-31-0104 (for Model 757-200 series airplanes) and 757-31-0105 (for 
Model 757-300 series airplanes), both dated December 5, 2002, which 
describe procedures for changing the EICAS OPS.
    Service Bulletin 767-31-0267 specifies the concurrent 
accomplishment of the actions specified in the service bulletins 
identified in the following table.

   Service Bulletins Concurrent With Boeing Special Attention Service
                          Bulletin 767-31-0267
------------------------------------------------------------------------
         Procedures             Service Bulletin     Affected airplanes
------------------------------------------------------------------------
Changing wires from the       Boeing Service        Model 767-200 and -
 audio accessory unit (AAU)    Bulletin 767-23-      300 series
 on the E2-5 shelf to the      0159, Revision 2,     airplanes.
 bell chime module in the      dated January 11,
 warning electronics unit      2007.
 (WEU) (P51).
------------------------------------------------------------------------
Replacing the AAU...........  Boeing Special        Model 767-300 series
                               Attention Service     airplanes.
                               Bulletin 767-23-
                               0160, dated May 31,
                               2001.
                             -------------------------------------------
                              Boeing Service        Model 767-300 series
                               Bulletin 767-23-      airplanes.
                               0167, dated
                               February 28, 2002.
------------------------------------------------------------------------
Replacing the pilots'         Boeing Service        Model 767-200 and
 handset on the P8 panel,      Bulletin 767-23-      767-300 series
 replacing 5 attendant         0164, dated May 31,   airplanes.
 handsets, and replacing the   2001.
 AAU on the E2-5 shelf in
 the main equipment center,
 as applicable.
------------------------------------------------------------------------

[[Page 22061]]

 
Replacing the left and right  Boeing Service        Model 767-200, 767-
 EICAS computers in the E8     Bulletin 767-31-      300, and 767-300F
 rack, making wire changes     0091, Revision 4,     series airplanes.
 in the E8 shelf, changing     dated July 7, 2005.
 the left and right EICAS
 computer connector keying
 on the E8 shelf, loading
 OPC software into both left
 and right EICAS computers.
                             -------------------------------------------
                              Boeing Service        Model 767-200 and
                               Bulletin 767-31-      767-300 series
                               0098, Revision 2,     airplanes.
                               including
                               Appendices A, B,
                               and C, dated
                               October 21, 1999.
                             -------------------------------------------
                              Boeing Service        Model 767-300 series
                               Bulletin 767-31-      airplanes.
                               0099, Revision 3,
                               including
                               Appendices A, B,
                               and C, dated
                               February 8, 2001.
                             -------------------------------------------
                              Boeing Service        Model 767-200 and
                               Bulletin 767-31-      767-300 series
                               0100, Revision 2,     airplanes.
                               including
                               Appendices A, B,
                               and C, dated July
                               29, 1999.
                             -------------------------------------------
                              Boeing Service        Model 767-200 and
                               Bulletin 767-31-      767-300 series
                               0101, including       airplanes.
                               Appendices A, B,
                               and C, dated July
                               6, 2000.
------------------------------------------------------------------------
Installing new EICAS OPS and  Boeing Service        Model 767-200, 767-
 EICAS OPC software, as        Bulletin 767-31-      300, and 767-300F
 applicable.                   0114, Revision 1,     series airplanes.
                               dated June 8, 2000.
------------------------------------------------------------------------

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 these same type 
designs.

Proposed AD Requirements

    This proposed AD would continue to require the AFM limitations 
specified in AD 2008-09-07. This proposed AD would also require the 
actions specified in the service information described previously, 
which would terminate the AFM limitations. This proposed AD also 
includes a provision that provides relief from the proposed 
requirements for airplanes with EICAS OPS versions other than Version 
6.

Change to Existing AD

    This proposed AD would retain the requirements of AD 2008-09-07. 
Since that AD was issued, the AD format has been revised, and certain 
paragraphs have been rearranged. As a result, the corresponding 
paragraph identifiers have changed in this proposed AD, as listed in 
the following table:

                      Revised Paragraph Identifiers
------------------------------------------------------------------------
                                      Corresponding  requirement in this
   Requirement in  AD 2008-09-07                 proposed AD
------------------------------------------------------------------------
             paragraph (f)                        paragraph (g)
             paragraph (g)                        paragraph (h)
------------------------------------------------------------------------

Costs of Compliance

    We estimate that this proposed AD affects 1,078 airplanes of U.S. 
registry. We estimate the costs to comply with the following proposed 
requirements:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                       Cost per     Cost on U.S.
                 Action                          Labor cost           Parts cost        product       operators
----------------------------------------------------------------------------------------------------------------
AFM revision (retained from AD 2008-09-  1 work-hour x $85 per                  $0             $85       $91,630
 07.                                      hour = $85.
EICAS OPS installation (new proposed     1 work-hour x $85 per                   0              85        91,630
 action).                                 hour = $85.
----------------------------------------------------------------------------------------------------------------

    We have no definitive data for the number of U.S.-registered 
airplanes subject to the proposed concurrent requirements in this 
proposed AD, but we provide the following estimated per-airplane costs 
to comply with the concurrent requirements.

                                     Estimated Costs for Concurrent Actions
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
    Action Service Bulletin       Service Bulletin      Labor cost             Parts cost             product
----------------------------------------------------------------------------------------------------------------
EICAS OPS installation.........  757-31-0104, 757-  1-2 work-hours x   Negligible...............        $85-$170
                                  31-0105.           $85 per hour =
                                                     $85-$170.
Wiring change..................  767-23-0159......  5 work-hours x     $501.....................             926
                                                     $85 per hour =
                                                     $425.
AAU/handset replacement........  767-23-0160, 767-  1 work-hour x $85  Negligible...............              85
                                  23-0167, 767-23-   per hour = $85.
                                  0164.

[[Page 22062]]

 
EICAS computer replacement,      767-31-0091, 767-  5-24 work-hours x  Negligible...............       425-2,040
 wiring change, OPC               31-0098, 767-31-   $85 per hour =
 installation.                    0099, 767-31-      $425-$2,040.
                                  0100, 767-31-
                                  0101.
EICAS OPS/OPC installation.....  767-31-0114......  1 work-hour x $85  Negligible...............              85
                                                     per hour = $85.
----------------------------------------------------------------------------------------------------------------

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),
    (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 airworthiness directive 
(AD) 2008-09-07, Amendment 39-15488 (73 FR 21811, April 23, 2008), and 
adding the following new AD:

The Boeing Company: Docket No. FAA-2011-0382; Directorate Identifier 
2010-NM-063-AD.

Comments Due Date

    (a) The FAA must receive comments on this AD action by May 5, 
2011.

Affected ADs

    (b) This AD supersedes AD 2008-09-07, Amendment 39-15488.

Applicability

    (c) This AD applies to all The Boeing Company 757-200, 757-
200PF, 757-200CB, 757-300, 767-200, 767-300, and 767-300F series 
airplanes; certificated in any category.

Subject

    (d) Joint Aircraft System Component (JASC)/Air Transport 
Association (ATA) of America Code 31, Instruments.

Unsafe Condition

    (e) This AD was prompted by an error in the operating program 
software (OPS) of the engine indication and crew alerting system 
(EICAS). The error prevents the display of an advisory message to 
the flight crew of a left engine fuel filter contamination and 
imminent bypass condition, which may indicate an imminent multiple 
engine thrust loss or engine malfunction event due to fuel 
contamination. We are issuing this AD to prevent malfunction and 
thrust loss on both engines, which could result in a forced off-
airport landing.

Compliance

    (f) Comply with this AD within the compliance times specified, 
unless already done.

Restatement of Requirements of AD 2008-09-07, With No Changes

Revision of Airplane Flight Manual (AFM)

    (g) Except as provided by paragraphs (h) and (i) of this AD: 
Within 30 days after May 8, 2008 (the effective date of AD 2008-09-
07), revise the Limitations section of the applicable AFM to include 
the following. This may be done by inserting a copy of this AD into 
the AFM.

    If the STATUS cue shows while on the ground after engine start 
or during flight, select the status page on the secondary EICAS 
display, and verify the ``L ENG FUEL FILT'' message is not shown. If 
the ``L ENG FUEL FILT'' message is not shown on the status page, the 
secondary engine parameters may be reselected on the secondary EICAS 
display, or the display may be blanked. If the ``L ENG FUEL FILT'' 
message is shown on the status display, accomplish the ENGINE FUEL 
FILTER non-normal checklist as published in the Boeing Quick 
Reference Handbook. If on the ground, check the Dispatch Deviations 
Guide (DDG), or operator equivalent.
    In the event that the status level ``L ENG FUEL FILT'' and 
advisory level ``R ENG FUEL FILT'' messages are simultaneously 
shown, an impending fuel filter bypass condition exists on both 
engines. With both messages shown, airplane fuel system 
contamination may be present and may result in erratic engine 
operation or flameout.
    Further flight crew action in response to either or both the ``L 
ENG FUEL FILT'' status-level message and the ``R ENG FUEL FILT'' 
advisory level messages being shown are not established by Boeing or 
the FAA. Any further flight crew action should be determined by 
individual operator policy.
    Boeing policy on flight crew use of status-level messages has 
not changed. After engine start, any condition having an adverse 
effect on safe continuation of the flight appears as an EICAS alert 
message (Warning, Caution, or Advisory). If other status-level 
messages are shown as a consequence of complying with these 
temporary operating instructions, the flight crew should respond in 
accordance with the appropriate operator policy.
    Dispatch of the airplane with an inoperative EICAS display unit 
is prohibited.

Exception to AFM Limitations Requirement

    (h) If all affected airplanes in an operator's fleet have been 
verified by the operator to have EICAS computer part number 
S242N701-1001 and only EICAS OPS versions other than Version 6 
software that are FAA approved for that airplane, then 
accomplishment of the actions specified in paragraph (g) of this AD 
is not required.

[[Page 22063]]

New Requirements of This AD

EICAS OPS Installation

    (i) Except as provided by paragraph (k) of this AD: Within 90 
days after the effective date of this AD, install EICAS OPS Version 
7 in the left and right EICAS computers, in accordance with the 
applicable service information specified in paragraph (i)(1) or 
(i)(2) of this AD. Accomplishment of the applicable requirements of 
paragraphs (i) and (j) of this AD terminates the requirements of 
paragraph (g) of this AD, provided that those actions have been 
accomplished on all airplanes operated within an operator's fleet.
    (1) For Model 757 airplanes: Use Boeing Special Attention 
Service Bulletin 757-31-0192, dated September 11, 2009.
    (2) For Model 767-200, -300, and -300F series airplanes: Use 
Boeing Special Attention Service Bulletin 767-31-0267, dated 
September 11, 2009.

Concurrent Requirements

    (j) For airplanes subject to the requirements of paragraph (i) 
of this AD: Before or concurrently with accomplishment of the 
requirements of paragraph (i) of this AD, do the applicable actions 
specified in paragraphs (j)(1) through (j)(12) of this AD.
    (1) For Model 757-200, 757-200CB, 757-200PF series airplanes, as 
identified in Boeing Service Bulletin 757-31-0104, dated December 5, 
2002: Install EICAS OPS Version 5, in accordance with Boeing Service 
Bulletin 757-31-0104, dated December 5, 2002.
    (2) For Model 757-300 series airplanes, as identified in Boeing 
Service Bulletin 757-31-0105, dated December 5, 2002: Install EICAS 
OPS Version 5, in accordance with Boeing Service Bulletin 757-31-
0105, dated December 5, 2002.
    (3) For Model 767-200 and -300 airplanes, as identified in 
Boeing Service Bulletin 767-23-0159, Revision 2, dated January 11, 
2007: Change wires from the audio accessory unit (AAU) on the E2-5 
shelf to the bell chime module in the warning electronics unit (WEU) 
(P51), in accordance with Boeing Service Bulletin 767-23-0159, 
Revision 2, dated January 11, 2007.
    (4) For Model 767-300 series airplanes, as identified in Boeing 
Special Attention Service Bulletin 767-23-0160, dated May 31, 2001: 
Replace the AAU with a new or serviceable unit, in accordance with 
Boeing Special Attention Service Bulletin 767-23-0160, dated May 31, 
2001.
    (5) For Model 767-300 series airplanes, as identified in Boeing 
Service Bulletin 767-23-0167, dated February 28, 2002: Replace the 
AAU with a new or serviceable unit, in accordance with Boeing 
Service Bulletin 767-23-0167, dated February 28, 2002.
    (6) For Model 767-200 and 767-300 series airplanes, as 
identified in Boeing Service Bulletin 767-23-0164, dated May 31, 
2001: Replace the pilots' handset on the P8 panel, replace 5 
attendant handsets, and replace the AAU on the E2-5 shelf in the 
main equipment center, as applicable; in accordance with Boeing 
Service Bulletin 767-23-0164, dated May 31, 2001.
    (7) For Model 767-200, 767-300, and 767-300F series airplanes, 
as identified in Boeing Service Bulletin 767-31-0091, Revision 4, 
dated July 7, 2005: Replace the left and right EICAS computers in 
the E8 rack, make wire changes in the E8 shelf, change the left and 
right EICAS computer connector keying on the E8 shelf, load OPC 
software into both left and right EICAS computers; in accordance 
with Boeing Service Bulletin 767-31-0091, Revision 4, dated July 7, 
2005. These actions are also required by AD 2004-10-05.
    (8) For Model 767-200 and 767-300 series airplanes, as 
identified in Boeing Service Bulletin 767-31-0098, Revision 2, dated 
October 21, 1999: Replace the left and right EICAS computers in the 
E8 rack, make wire changes in the E8 shelf, change the left and 
right EICAS computer connector keying on the E8 shelf, load OPC 
software into both left and right EICAS computers; in accordance 
with Boeing Service Bulletin 767-31-0098, Revision 2, dated October 
21, 1999. These actions are also required by AD 2004-10-05.
    (9) For Model 767-300 series airplanes, as identified in Boeing 
Service Bulletin 767-31-0099, Revision 3, dated February 8, 2001: 
Replace the left and right EICAS computers in the E8 rack, make wire 
changes in the E8 shelf, change the left and right EICAS computer 
connector keying on the E8 shelf, load OPC software into both left 
and right EICAS computers; in accordance with Boeing Service 
Bulletin 767-31-0099, Revision 3, dated February 8, 2001. These 
actions are also required by AD 2004-10-05.
    (10) For Model 767-200 and 767-300 series airplanes, as 
identified in Boeing Service Bulletin 767-31-0100, Revision 2, dated 
July 29, 1999: Replace the left and right EICAS computers in the E8 
rack, make wire changes in the E8 shelf, change the left and right 
EICAS computer connector keying on the E8 shelf, load OPC software 
into both left and right EICAS computers; in accordance with Boeing 
Service Bulletin 767-31-0100, Revision 2, dated July 29, 1999. These 
actions are also required by AD 2004-10-05.
    (11) For Model 767-200 and 767-300 series airplanes, as 
identified in Boeing Service Bulletin 767-31-0101, dated July 6, 
2000: Replace the left and right EICAS computers in the E8 rack, 
make wire changes in the E8 shelf, change the left and right EICAS 
computer connector keying on the E8 shelf, load OPC software into 
both left and right EICAS computers; in accordance with Boeing 
Service Bulletin 767-31-0101, dated July 6, 2000. These actions are 
also required by AD 2004-10-05.
    (12) For Model 767-200, 767-300, and 767-300F series airplanes, 
as identified in Boeing Service Bulletin 767-31-0114, Revision 1, 
dated June 8, 2000: Install EICAS OPS Version 2 and EICAS OPC 
software, as applicable, in accordance with Boeing Service Bulletin 
767-31-0114, Revision 1, dated June 8, 2000.

Exception to OPS Installation Requirement

    (k) For any airplane verified by the operator to have EICAS 
computer part number S242N701-1001 and only EICAS OPS versions other 
than Version 6 software that are FAA approved for that airplane, the 
actions specified in paragraphs (i) and (j) of this AD are not 
required.

Parts Installation

    (l) As of the effective date of this AD, no person may install 
EICAS OPS Version 6 software on any airplane.

Credit for Actions Accomplished in Accordance With Previous Service 
Information

    (m) Accomplishment before the effective date of this AD of the 
actions specified in a service bulletin identified in table 1 of 
this AD is acceptable for compliance with the applicable 
requirements of paragraph (j) of this AD, except as noted.

                                        Table 1--Credit Service Bulletins
----------------------------------------------------------------------------------------------------------------
                                                                                             Airplanes excluded
    Boeing Service Bulletin               Revision                        Date                from compliance
                                                                                                  approval
----------------------------------------------------------------------------------------------------------------
767-23-0159...................  1...........................  December 5, 2002...........  No exceptions.
767-31-0091...................  1...........................  February 4, 1999...........  Acceptable except for
                                                                                            airplanes VN634,
                                                                                            VN635, VH171, VN172,
                                                                                            VF251, and VN198.
767-31-0091...................  2...........................  February 24, 2000..........  Acceptable except for
                                                                                            airplane VN198.
767-31-0091...................  3...........................  April 27, 2000.............  No exceptions.
767-31-0098...................  Original....................  August 27, 1998............  Acceptable except for
                                                                                            airplanes VB051
                                                                                            through VB054, VN307
                                                                                            through VN314,
                                                                                            VN676, and VK046
                                                                                            through VK054.
767-31-0098...................  1...........................  February 4, 1999...........  Acceptable except for
                                                                                            airplanes VB051
                                                                                            through VB054, VN307
                                                                                            through VN314,
                                                                                            VN676, and VK046
                                                                                            through VK054.
767-31-0099...................  Original....................  August 6, 1998.............  Acceptable only for
                                                                                            airplanes VL871
                                                                                            through VL873.
767-31-0099...................  1...........................  February 4, 1999...........  Acceptable only for
                                                                                            airplanes VL871
                                                                                            through VL873.
767-31-0099...................  2...........................  June 17, 1999..............  Acceptable only for
                                                                                            airplanes VL871
                                                                                            through VL873.
767-31-0100...................  Original....................  August 20, 1998............  No exceptions.
767-31-0100...................  1...........................  February 4, 1999...........  No exceptions.

[[Page 22064]]

 
767-31-0114...................  Original....................  March 18, 1999.............  Acceptable except for
                                                                                            airplanes VL891
                                                                                            through VL910, VR201
                                                                                            through VR206, and
                                                                                            VW701 through VW721.
----------------------------------------------------------------------------------------------------------------

Alternative Methods of Compliance (AMOCs)

    (n)(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 [email protected].
    (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.

Related Information

    (o) For more information about this AD, contact Christopher 
Shams, Aerospace Engineer, Propulsion Branch, ANM-140S, FAA, Seattle 
Aircraft Certification Office (ACO), 1601 Lind Avenue, SW., Renton, 
Washington 98057-3356; telephone 425-917-6753; fax 425-917-6590; e-
mail [email protected].
    (p) 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 April 13, 2011.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2011-9524 Filed 4-19-11; 8:45 am]
BILLING CODE 4910-13-P