[Federal Register Volume 72, Number 130 (Monday, July 9, 2007)]
[Proposed Rules]
[Pages 37132-37137]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E7-13265]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-28598; Directorate Identifier 2007-NM-036-AD]
RIN 2120-AA64


Airworthiness Directives; Boeing Model 757-200, -200CB, -200PF, 
and -300 Series Airplanes

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

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for all Boeing Model 757-200, -200CB, -200PF, and -300 series 
airplanes. This proposed AD would require installation of an automatic 
shutoff system for the center tank fuel boost pumps, and installation 
of a placard in the airplane flight deck if necessary. This proposed AD 
would also require revisions to the Limitations and Normal Procedures 
sections of the airplane flight manual to advise the flightcrew of 
certain operating restrictions for airplanes equipped with an automated 
center tank fuel pump shutoff control. This proposed AD would also 
require a revision to the Airworthiness Limitations (AWLs) section of 
the Instructions for Continued Airworthiness to incorporate AWL No. 28-
AWL-20 and No. 28-AWL-26. This proposed AD would also require 
replacement of the fuel control panel assembly with a modified part, 
installation of two secondary pump control relays for the center tank 
fuel pumps, other specified actions, and concurrent modification of the 
fuel control panel assembly. This proposed AD results from fuel system 
reviews conducted by the manufacturer. We are proposing this AD to 
prevent center tank fuel pump operation with continuous low pressure, 
which could lead to friction sparks or overheating in the fuel pump 
inlet or could create a potential ignition source inside the center 
fuel tank; these conditions, in combination with flammable fuel vapors, 
could result in a center fuel tank

[[Page 37133]]

explosion and consequent loss of the airplane.

DATES: We must receive comments on this proposed AD by August 23, 2007.

ADDRESSES: Use one of the following addresses to submit comments on 
this proposed AD.
     DOT Docket Web site: Go to http://dms.dot.gov and follow 
the instructions for sending your comments electronically.
     Government-wide rulemaking Web site: Go to http://www.regulations.gov and follow the instructions for sending your 
comments electronically.
     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.
     Fax: (202) 493-2251.
     Hand Delivery: Room W12-140 on the ground floor of the 
West Building, 1200 New Jersey Avenue, SE., Washington, DC, between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, 
Washington 98124-2207, for the service information identified in this 
proposed AD.

FOR FURTHER INFORMATION CONTACT: Judy Coyle, Aerospace Engineer, 
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification 
Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone 
(425) 917-6497; fax (425) 917-6590.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to submit any relevant written data, views, or 
arguments regarding this proposed AD. Send your comments to an address 
listed in the ADDRESSES section. Include the docket number ``FAA-2007-
28598; Directorate Identifier 2007-NM-036-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of the proposed AD. We will 
consider all comments received by the closing date and may amend the 
proposed AD in light of those comments.
    We will post all comments we receive, without change, to http://
http://dms.dot.gov">dms.dot.gov, including any personal information you provide. We will 
also post a report summarizing each substantive verbal contact with FAA 
personnel concerning this proposed AD. Using the search function of 
that Web site, anyone can find and read the comments in any of our 
dockets, including the name of the individual who sent the comment (or 
signed the comment on behalf of an association, business, labor union, 
etc.). You may review DOT's complete Privacy Act Statement in the 
Federal Register published on April 11, 2000 (65 FR 19477-78), or you 
may visit http://dms.dot.gov.

Examining the Docket

    You may examine the AD docket on the Internet at http://
http://dms.dot.gov">dms.dot.gov, or in person at the Docket Operations office between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays. The 
Docket Operations office (telephone (800) 647-5527) is located on the 
ground floor of the West Building at the DOT street address stated in 
the ADDRESSES section. Comments will be available in the AD docket 
shortly after the Docket Management System receives them.

Discussion

    The FAA has examined the underlying safety issues involved in fuel 
tank explosions on several large transport airplanes, including the 
adequacy of existing regulations, the service history of airplanes 
subject to those regulations, and existing maintenance practices for 
fuel tank systems. As a result of those findings, we issued a 
regulation titled ``Transport Airplane Fuel Tank System Design Review, 
Flammability Reduction and Maintenance and Inspection Requirements'' 
(66 FR 23086, May 7, 2001). In addition to new airworthiness standards 
for transport airplanes and new maintenance requirements, this rule 
included Special Federal Aviation Regulation No. 88 (``SFAR 88,'' 
Amendment 21-78, and subsequent Amendments 21-82 and 21-83).
    Among other actions, SFAR 88 requires certain type design (i.e., 
type certificate (TC) and supplemental type certificate (STC)) holders 
to substantiate that their fuel tank systems can prevent ignition 
sources in the fuel tanks. This requirement applies to type design 
holders for large turbine-powered transport airplanes and for 
subsequent modifications to those airplanes. It requires them to 
perform design reviews and to develop design changes and maintenance 
procedures if their designs do not meet the new fuel tank safety 
standards. As explained in the preamble to the rule, we intended to 
adopt airworthiness directives to mandate any changes found necessary 
to address unsafe conditions identified as a result of these reviews.
    In evaluating these design reviews, we have established four 
criteria intended to define the unsafe conditions associated with fuel 
tank systems that require corrective actions. The percentage of 
operating time during which fuel tanks are exposed to flammable 
conditions is one of these criteria. The other three criteria address 
the failure types under evaluation: Single failures, single failures in 
combination with a latent condition(s), and in-service failure 
experience. For all four criteria, the evaluations included 
consideration of previous actions taken that may mitigate the need for 
further action.
    We have determined that the actions identified in this proposed AD 
are necessary to reduce the potential of ignition sources inside fuel 
tanks, which, in combination with flammable fuel vapors, could result 
in fuel tank explosions and consequent loss of the airplane.
    Boeing has found that certain failures will result in the center 
tank fuel pumps continuing to run after the tank has been depleted. 
Depending on the failure, pump low pressure may not be annunciated, or 
power may not be removed from the pump when the pump has been commanded 
``OFF.'' Operation of the center tank fuel pump with continuous low 
pressure could lead to friction sparks or overheating in the fuel boost 
pump inlet. This condition, if not corrected, could result in a fuel 
tank explosion and consequent loss of the airplane.

Other Relevant Rulemaking

    On September 24, 2002, we issued AD 2002-19-52, amendment 39-12900 
(67 FR 61253, September 30, 2002), applicable to all Boeing Model 737-
600, -700, -700C, -800, and -900 series airplanes, Model 747 airplanes, 
and Model 757 airplanes. That AD requires revising the airplane flight 
manual (AFM) to advise the flightcrew of certain operating restrictions 
for maintaining minimum fuel levels, prohibits use of the horizontal 
stabilizer tank on certain airplanes, and prohibits the installation of 
certain fuel pumps. That AD requires concurrent removal of the 
currently required AFM revisions and insertion of new AFM revisions, 
requires installation of placards to alert the flightcrew to the 
operating restrictions, and prohibits installation of any un-inspected 
pumps. That AD permits the AFM revision and placard to be removed under 
certain conditions. Installation of a placard in accordance with 
paragraph (e) of AD 2002-19-52, amendment 39-12900, is acceptable for 
compliance with paragraph (h) of this AD.
    On November 23, 2002, we issued emergency AD 2002-24-51, amendment

[[Page 37134]]

39-12992, applicable to all Boeing Model 737-600, -700, -700C, -800, 
and -900 series airplanes, Model 747 airplanes, and Model 757 
airplanes. (We issued a Federal Register version of AD 2002-24-51 on 
December 23, 2002 (68 FR 10, January 2, 2003).) That AD requires 
revising the AFM to require the flightcrew to maintain certain minimum 
fuel levels in the center fuel tanks and, for certain airplanes, to 
prohibit the use of the horizontal stabilizer fuel tank and certain 
center auxiliary fuel tanks. Accomplishing the actions specified in 
paragraphs (g), (h), (i), and (j) of this proposed AD would terminate 
the AFM revision specified in paragraph (e) of AD 2002-24-51 for Model 
757-200, -200CB, -200PF, and -300 series airplanes that have the 
automatic shutoff system installed.

Relevant Service Information

    We have reviewed Boeing Alert Service Bulletin 757-28A0081, dated 
February 16, 2006, for Model 757-200, -200CB, and -200PF series 
airplanes; and Boeing Alert Service Bulletin 757-28A0082, dated 
February 16, 2006, for Model 757-300 series airplanes. These service 
bulletins describe procedures for installing an automatic shutoff 
system for the center tank fuel boost pumps. Installation of the 
automatic shutoff system includes the following actions:
     In the main flight compartment, installing time delay 
relays in the P33 and P37 relay panels and installing automatic shutoff 
fuel test switches at the E2-1 rack stanchion.
     At the P11-3 and P11-4 circuit breaker panels in the 
flight compartment, adding new circuit breakers and replacing the light 
plate with a new improved light plate.
     Changing certain wire bundles in the P11-3 and P11-4 
circuit breaker panels, in the P33 and P37 relay panels, between the 
P33 relay panel and the P5 overhead panel, between the P37 relay panel 
and the P5 overhead panel, and between the P11-3 circuit breaker panel 
and the P33 relay panel.
     Installing new wire bundles between the P33 relay panel 
and the test switch at the E2-1 rack stanchion and between the P37 
relay panel and the test switch at the E2-1 rack stanchion.
    We have also reviewed Section 9 of the Boeing 757 Maintenance 
Planning Data (MPD) Document, D622N001-9, Revision January 2006 
(hereafter referred to as ``Revision January 2006 of the MPD''). 
Subsection G, ``AIRWORTHINESS LIMITATIONS--FUEL SYSTEMS AWLs,'' of 
Revision January 2006 of the MPD describes new airworthiness 
limitations (AWLs) for fuel tank systems. The AWLs include:
     AWL inspections, which are periodic inspections of certain 
features for latent failures that could contribute to an ignition 
source.
     Critical design configuration control limitations 
(CDCCLs), which are 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 change that may 
be caused by alterations, repairs, or maintenance actions. A CDCCL is 
not a periodic inspection. Revision January 2006 of the MPD adds new 
fuel system AWL No. 28-AWL-20, which is a repetitive inspection of the 
automatic shutoff system for the center tank fuel boost pumps to verify 
functional integrity.
    We have also reviewed Boeing Alert Service Bulletin 757-28A0105, 
Revision 1, dated April 2, 2007, for Model 757-200, -200CB, -200PF, and 
-300 series airplanes. This service bulletin describes procedures for 
replacing fuel control panel assembly part number (P/N) 233N3206-( ) 
(equipment number M10055) with a modified fuel control panel assembly, 
installing two secondary override pump control relays for the center 
tank fuel pumps in the P33 and P37 relays panels, and doing other 
specified actions. The other specified actions include the following:
     Changing the W2066 wire bundle located between the P5 
overhead panel in the flight compartment and the P33 relay panel 
located in the main equipment center.
     Changing the W2070 wire bundle located between the P5 
overhead panel in the flight compartment and P37 relay panel located in 
the main equipment center.
     Changing the W1230 wire bundle at the P33 relay panel.
     Changing the W1270 wire bundle at the P37 relay panel.
     Doing a functional test of the left and right primary and 
secondary override pump control relays.
     Doing a pump reversal test of the left and right override 
fuel pumps.
    We have also reviewed Boeing Temporary Revision (TR) 09-006, dated 
January 2007. Boeing TR 09-006 is published as Section 9 of the Boeing 
757 MPD Document, D622N001-9, Revision January 2007 (hereafter referred 
to as ``Revision January 2007 of the MPD''). Subsection G of Revision 
January 2007 of the MPD adds new fuel system AWL No. 28-AWL-26, which 
is a repetitive inspection of the power failed on protection system for 
the center tank fuel boost pumps to verify functional integrity.
    Boeing Alert Service Bulletin 757-28A0105 specifies prior or 
concurrent accomplishment of BAE Systems Service Bulletin 233N3206-28-
03, dated October 4, 2006. The BAE Systems service bulletin describes 
procedures for modifying the M10055 fuel control panel assembly, P/N 
233N3206-( ), to provide protection from ``uncommanded pump ON'' 
situations. The modification includes rerouting the J2 connector wire 
bundles from the forward left main pump switch S2 to the left center 
pump switch S6, rerouting the J3 connector wire bundles from the 
forward right main pump switch S5 to the right center pump switch S7, 
and installing new tie clips to secure the rerouted wire bundles.
    Accomplishing the actions specified in the service information is 
intended to adequately address the unsafe condition.

FAA's Determination and Requirements of the Proposed AD

    We have evaluated all pertinent information and identified an 
unsafe condition that is likely to exist or develop on other airplanes 
of this same type design. For this reason, we are proposing this AD, 
which would require the following actions:
     Installation of an automatic shutoff system for the center 
tank fuel boost pumps.
     Installation of a placard in the airplane flight deck, if 
necessary. (Placards are necessary only for ``mixed fleet operation,'' 
which means that some airplanes in an operator's fleet are equipped 
with automatic shutoff systems while other airplanes are not.)
     Revisions to the Limitations and Normal Procedures 
sections of the AFM to advise the flightcrew of certain operating 
restrictions for airplanes equipped with an automated center tank fuel 
pump shutoff control.
     Revision to the AWLs section of the Instructions for 
Continued Airworthiness to incorporate AWL No. 28-AWL-20, which would 
require repetitive inspections of the automatic shutoff system for the 
center tank fuel boost pumps to verify functional integrity.
     Replacement of fuel control panel assembly P/N 233N3206-( 
) with a modified fuel control panel assembly, installation of two 
secondary override pump control relays for the center tank fuel pumps 
in the P33 and P37 relays panels, and other specified actions.

[[Page 37135]]

     Concurrent modification of the M10055 fuel control panel 
assembly, P/N 233N3206-( ).
     Revision to the AWLs section of the Instructions for 
Continued Airworthiness to incorporate AWL No. 28-AWL-26, which would 
require repetitive inspections of the power failed on protection system 
for the center tank fuel boost pumps to verify functional integrity.
    This proposed AD would also allow accomplishing the revision to the 
AWLs section of the Instructions for Continued Airworthiness in 
accordance with later revisions of the MPD as an acceptable method of 
compliance if they are approved by the Manager, Seattle Aircraft 
Certification Office (ACO), FAA.

Costs of Compliance

    There are about 1,094 Model 757-200, -200CB, -200PF, and -300 
series airplanes of the affected design in the worldwide fleet. The 
following table provides the estimated costs, at an average labor rate 
of $80 per hour, for U.S. operators to comply with this proposed AD. 
The estimated cost of parts in the following table depends on the 
configuration of an airplane.

                                                                     Estimated Costs
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                       Number of
                                                                                                                         U.S.-
               Model                        Action          Work hours          Parts            Cost per airplane     registered        Fleet cost
                                                                                                                       airplanes
--------------------------------------------------------------------------------------------------------------------------------------------------------
 757-200, -200CB, and -200PF,       Installation of the             91  $8,309 to $9,194.....  $15,309 to $16,474...          631  $9,836,659 to
 series airplanes.                   automatic shutoff                                                                             $10,395,094.
                                     system.
757-300 series airplanes..........  Installation of the             51  $8,598 to $8,654.....  $12,678 to $12,734...           75  $950,850 to $955,050.
                                     automatic shutoff
                                     system.
757-200, -200CB, -200PF, and -300   Placard installation,            1  $10..................  $90..................          706  $63,540.
 series airplanes.                   if necessary.
                                    AFM revision.........            1  None.................  $80..................          706  $56,480.
                                    Maintenance program              1  None.................  $80..................          706  $56,480.
                                     revision.
                                    Installation of                 29  $2,097...............  $4,417...............          706  $3,118,402.
                                     secondary pump
                                     control relays.
                                    Concurrent                       2  $40..................  $200.................          706  $141,200.
                                     modification of the
                                     fuel control panel
                                     assembly.
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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 have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act. We prepared a regulatory evaluation 
of the estimated costs to comply with this proposed AD and placed it in 
the AD docket. See the ADDRESSES section for a location to examine the 
regulatory evaluation.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, 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 Federal Aviation Administration (FAA) amends Sec.  39.13 by 
adding the following new airworthiness directive (AD):

Boeing: Docket No. FAA-2007-28598; Directorate Identifier 2007-NM-
036-AD.

Comments Due Date

    (a) The FAA must receive comments on this AD action by August 
23, 2007.

Affected ADs

    (b) Accomplishing certain paragraphs of this AD terminates 
certain requirements of AD 2002-24-51, amendment 39-12992.

Applicability

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

    Note 1: This AD requires revisions to certain operator 
maintenance documents to include new inspections of the automatic 
shutoff system for the center tank fuel boost pumps. Compliance with 
these inspections is required by 14 CFR 43.16 and 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 inspections described in the revisions. In 
this situation, to comply with 14 CFR 91.403(c), the operator must 
request approval for an alternative method of compliance according 
to paragraph (p) of this AD. The request should include a 
description of changes to the required inspections that will ensure 
acceptable maintenance of the automatic shutoff system.


[[Page 37136]]



Unsafe Condition

    (d) This AD results from fuel system reviews conducted by the 
manufacturer. We are issuing this AD to prevent center tank fuel 
pump operation with continuous low pressure, which could lead to 
friction sparks or overheating in the fuel pump inlet or could 
create a potential ignition source inside the center fuel tank; 
these conditions, in combination with flammable fuel vapors, could 
result in a center fuel tank explosion and consequent loss of the 
airplane.

Compliance

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

Service Bulletin References

    (f) The term ``service bulletin,'' as used in this AD, means the 
Accomplishment Instructions of the following service bulletins, as 
applicable.

                  Table 1.--Service Bulletin References
------------------------------------------------------------------------
          Airplanes                  Action           Service Bulletin
------------------------------------------------------------------------
Model 757-200, -200CB, and -  Installation          Boeing Alert Service
 200PF series airplanes.       specified in          Bulletin 757-
                               paragraph (g) of      28A0081, dated
                               this AD.              February 16, 2006.
Model 757-300 series          Installation          Boeing Alert Service
 airplanes.                    specified in          Bulletin 757-
                               paragraph (g) of      28A0082, dated
                               this AD.              February 16, 2006.
For Model 757-200, -200CB, -  Installation          Boeing Alert Service
 200PF, and -300 series        specified in          Bulletin 757-
 airplanes.                    paragraph (k) of      28A0105, Revision
                               this AD.              1, dated April 2,
                                                     2007.
------------------------------------------------------------------------

Installation of Automatic Shutoff System for the Center Tank Fuel Boost 
Pumps

    (g) Within 36 months after the effective date of this AD: 
Install an automatic shutoff system for the center tank fuel boost 
pumps, by accomplishing all of the actions specified in the 
applicable service bulletin. If a placard has been previously 
installed on the airplane in accordance with paragraph (h) of this 
AD, the placard may be removed from the flight deck of only that 
airplane after the automatic shutoff system has been installed. 
Installing automatic shutoff systems on all airplanes in an 
operator's fleet, in accordance with this paragraph, terminates the 
placard installation required by paragraph (h) of this AD, for all 
airplanes in an operator's fleet.

Placard Installation for Mixed Fleet Operation

    (h) Concurrently with installing an automatic shutoff system on 
any airplane in a operator's fleet, as required by paragraph (g) of 
this AD: Install a placard adjacent to the pilot's primary flight 
display on all airplanes in the operator's fleet not equipped with 
an automatic shutoff system for the center tank fuel boost pumps. 
The placard reads as follows (alternative placard wording may be 
used if approved by an appropriate FAA Principal Operations 
Inspector):

    ``AD 2002-24-51 fuel usage restrictions required.''

    Installation of a placard in accordance with paragraph (e) of AD 
2002-19-52, amendment 39-12900, is acceptable for compliance with 
the requirements of this paragraph. Installing an automatic shutoff 
system on an airplane, in accordance with paragraph (g) of this AD, 
terminates the placard installation required by this paragraph, for 
only that airplane. Installing automatic shutoff systems on all 
airplanes in an operator's fleet, in accordance with paragraph (g) 
of this AD, terminates the placard installation required by this 
paragraph, for all airplanes in an operator's fleet. If automatic 
shutoff systems are installed concurrently on all airplanes in an 
operator's fleet in accordance with paragraph (g) of this AD, or if 
operation according to the fuel usage restrictions of AD 2002-24-51 
is maintained until automatic shutoff systems are installed on all 
airplanes in an operator's fleet, the placard installation specified 
in this paragraph is not required.

Airplane Flight Manual (AFM) Revision

    (i) Concurrently with accomplishing the actions required by 
paragraph (g) of this AD: Do the actions specified in paragraphs 
(i)(1) and (i)(2) of this AD.
    (1) Revise Section 1 of the Limitations section of the Boeing 
757 AFM to include the following statement. This may be done by 
inserting a copy of this AD in the AFM.

    ``Intentional dry running of a center tank fuel pump (CTR L FUEL 
PUMP or CTR R FUEL PUMP message displayed on EICAS) is prohibited.''


    Note 2: When a statement identical to that in paragraph (i)(1) 
of this AD has been included in the general revisions of the AFM, 
the general revisions may be inserted into the AFM, and the copy of 
this AD may be removed from the AFM.

    (2) Revise Section 3.1 of the Normal Procedures section of the 
Boeing 757 AFM to include the following statements. This may be done 
by inserting a copy of this AD in the AFM.

    ``Procedures contained on this page are applicable to airplanes 
equipped with the automatic center tank fuel pump power removal 
system per Boeing Service Bulletin 757-28A0081 (757-200 Series) or 
757-28A0082 (757-300 Series).

CENTER TANK FUEL PUMPS

    Center tank fuel pump switches must not be ``ON'' unless 
personnel are available in the flight deck to monitor low PRESS 
lights.
    For ground operations prior to engine start: The center tank 
fuel pump switches must not be positioned ON unless the center tank 
contains usable fuel. With center tank fuel pump switches ON, verify 
both center tank fuel pump low PRESS lights are illuminated and 
EICAS CTR L FUEL PUMP and CTR R FUEL PUMP messages are displayed.
    For ground operations after engine start and flight operations: 
The center tank fuel pump switch must be selected OFF when the 
respective CTR L FUEL PUMP or CTR R FUEL PUMP message displays. Both 
center tank fuel pump switches must be selected OFF when either the 
CTR L FUEL PUMP or CTR R FUEL PUMP message displays if the center 
tank is empty. During cruise flight, both center tank pump switches 
may be reselected ON whenever center tank usable fuel is indicated.

DE-FUELING AND FUEL TRANSFER

    When transferring fuel or de-fueling center or main wing tanks, 
the center fuel pump low PRESS must be monitored and the fuel pump 
switches positioned to ``OFF'' at the first indication of low 
pressure. Prior to transferring fuel or de-fueling, conduct a lamp 
test of the respective fuel pump low PRESS lights.
    De-fueling main wing tanks with passengers onboard is prohibited 
if main tank fuel pumps are powered. De-fueling center wing tank 
with passengers onboard is prohibited if the center wing tank fuel 
pumps are powered with the automatic center tank fuel pump power 
removal system inhibited. Fuel may be transferred from tank to tank, 
or the aircraft may be de-fueled with passengers onboard, provided 
fuel quantity in the tank from which fuel is being transferred from 
is maintained above 2,000 pounds (900 kilograms).''

    Note 3: When statements identical to those in paragraph (i)(2) 
of this AD have been included in the general revisions of the AFM, 
the general revisions may be inserted into the AFM, and the copy of 
this AD may be removed from the AFM.

Airworthiness Limitations (AWLs) Revision for AWL No. 28-AWL-20

    (j) Concurrently with accomplishing the actions required by 
paragraph (g) of this AD: Revise the AWLs section of the 
Instructions for Continued Airworthiness by incorporating AWL No. 
28-AWL-20 of Subsection G of the Boeing 757 Maintenance Planning 
Data (MPD) Document, D622N001-9, Section 9, Revision January 2006, 
into the MPD. Accomplishing the revision in accordance with a later 
revision of the MPD is an acceptable method of compliance if the 
revision is approved by the Manager, Seattle Aircraft Certification 
Office (ACO), FAA.

Installation of Secondary Override Pump Control Relays

    (k) Within 60 months after the effective date of this AD: 
Replace fuel control panel assembly part number 233N3206-( )

[[Page 37137]]

(equipment number M10055) with a modified fuel control assembly, 
install the secondary override pump control relays for the center 
tank fuel pumps in the P33 and P37 relays panels, and do all other 
specified actions as applicable, by accomplishing all of the 
applicable actions specified in the applicable service bulletin. The 
other specified actions must be accomplished before further flight 
after installing the secondary override pump control relays.

Concurrent Modification of the M10055 Fuel Control Panel Assembly

    (l) For airplanes identified in paragraph 1.A.1. of Boeing Alert 
Service Bulletin 757-28A0105, Revision 1, dated April 2, 2007, 
equipped with any fuel control panel assembly identified in 
paragraph 1.A. of BAE Systems Service Bulletin 233N3206-28-03, dated 
October 4, 2006: Before or concurrently with accomplishing the 
actions required by paragraph (k) of this AD, modify the fuel 
control panel assembly, in accordance with BAE Systems Service 
Bulletin 233N3206-28-03, dated October 4, 2006.

AWLs Revision for AWL No. 28-AWL-26

    (m) Before or concurrently with accomplishing the actions 
required by paragraph (k) of this AD: Revise the AWLs section of the 
Instructions for Continued Airworthiness by incorporating AWL No. 
28-AWL-26 of Boeing Temporary Revision (TR) 09-006, dated January 
2007, into the MPD. Boeing TR 09-006 is published as Section 9 of 
the Boeing 757 MPD Document, D622N001-9, Revision January 2007. 
Accomplishing the revision in accordance with a later revision of 
the MPD is an acceptable method of compliance if the revision is 
approved by the Manager, Seattle ACO.

Terminating Action for AD 2002-24-51

    (n) Accomplishing the actions required by paragraphs (g), (h), 
(i), and (j) of this AD terminates the AFM limitations required by 
paragraph (e) of AD 2002-24-51 for Model 757-200, -200CB, -200PF, 
and -300 series airplanes that have the automatic shutoff system 
installed, except for the following limitation:
    ``Warning--Do not reset a tripped fuel pump circuit breaker.''

    Except for this limitation, all other AFM limitations required 
by paragraph (e) of AD 2002-24-51 for Model 757-200, -200CB, -200PF, 
and -300 series airplanes may be removed from the AFM after 
accomplishing the actions required by paragraphs (g), (h), (i), and 
(j) of this AD.

Credit for Actions Done According to Previous Issue of Service Bulletin

    (o) Actions accomplished before the effective date of this AD in 
accordance with Boeing Alert Service Bulletin 757-28A0105, dated 
January 31, 2007, are considered acceptable for compliance with the 
corresponding actions specified in paragraph (k) of this AD.

Alternative Methods of Compliance (AMOCs)

    (p)(1) The Manager, Seattle ACO, has the authority to approve 
AMOCs for this AD, if requested in accordance with the procedures 
found in 14 CFR 39.19.
    (2) To request a different method of compliance or a different 
compliance time for this AD, follow the procedures in 14 CFR 39.19. 
Before using any approved AMOC on any airplane to which the AMOC 
applies, notify your appropriate principal inspector (PI) in the FAA 
Flight Standards District Office (FSDO), or lacking a PI, your local 
FSDO.
    (3) Installation of TDG Aerospace, Inc. Universal Fault 
Interrupter (UFI), installed and maintained in accordance with 
Supplemental Type Certificate (STC) ST01950LA, is approved as an 
AMOC with paragraphs (a) through (m) of this AD.

    Note 4: Information concerning the existence of approved AMOCs 
with this AD, if any, may be obtained from the Seattle ACO.


    Issued in Renton, Washington, on June 25, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E7-13265 Filed 7-6-07; 8:45 am]
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