[Federal Register Volume 72, Number 127 (Tuesday, July 3, 2007)]
[Proposed Rules]
[Pages 36380-36385]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E7-12815]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-28385; Directorate Identifier 2006-NM-181-AD]
RIN 2120-AA64


Airworthiness Directives; Boeing Model 747-100, 747-100B, 747-
100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP 
Series Airplanes

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

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for all Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-
200C, 747-200F, 747-300, 747SR, and 747SP series airplanes. This 
proposed AD would require revising the FAA-approved maintenance program 
by incorporating new airworthiness limitations (AWLs) for fuel tank 
systems to satisfy Special Federal Aviation Regulation No. 88 
requirements. This proposed AD would also require the initial 
inspection of certain repetitive AWL inspections to phase in those 
inspections, and repair if necessary. This proposed AD results from a 
design review of the fuel tank systems. 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 August 17, 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

[[Page 36381]]

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: Kathrine Rask, Aerospace Engineer, 
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification 
Office, 1601 Lind Ave, SW., Renton, Washington 98057-3356; telephone 
(425) 917-6505; 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-
28385; Directorate Identifier 2006-NM-181-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://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://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'' 
(67 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 another 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 a fuel tank explosion and consequent loss of the airplane.

Relevant Service Information

    We have reviewed Boeing 747-100/200/300/SP Airworthiness 
Limitations (AWLs) and Certification Maintenance Requirements (CMRs), 
D6-13747-CMR, Revision March 2006 (hereafter referred to as ``Revision 
March 2006 of Document D6-13747-CMR''). (For the purposes of Revision 
March 2006 of Document D6-13747-CMR, the Model 747SR series airplane is 
basically a Model 747-100 series airplane with certain modifications to 
improve fatigue life.) Section D of Revision March 2006 of Document D6-
13747-CMR describes new AWLs for fuel tank systems. The new AWLs 
include:
     AWL inspections, which are periodic inspections of certain 
features for latent failures that could contribute to an ignition 
source; and
     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.
    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 revising the FAA-approved maintenance program by 
incorporating the information in Section D of Revision March 2006 of 
Document D6-13747-CMR. This proposed AD would also require the initial 
inspection of certain repetitive AWL inspections to phase in those 
inspections, and repair if necessary.

Explanation of Compliance Time

    In most ADs, we adopt a compliance time allowing a specified amount 
of time after the AD's effective date. In this case, however, the FAA 
has already issued regulations that require operators to revise their 
maintenance/inspection programs to address fuel tank safety issues. The 
compliance date for these regulations is December 16, 2008. To

[[Page 36382]]

provide for efficient and coordinated implementation of these 
regulations and this proposed AD, we are using this same compliance 
date in this proposed AD, instead of the 18-month compliance time 
recommended by Boeing.

Rework Required When Implementing AWLs Into an Existing Fleet

    The maintenance program revision for the fuel tank systems 
specified in paragraph (g) of this proposed AD, which involves 
incorporating the information specified in Revision March 2006 of 
Document D6-13747-CMR, would affect how operators maintain their 
airplanes. After doing that maintenance program revision, operators 
would need to do any maintenance on the fuel tank system as specified 
in the CDCCLs. Maintenance done before the maintenance program revision 
specified in paragraph (g) would not need to be redone in order to 
comply with paragraph (g). For example, the AWL that requires fuel 
pumps to be repaired and overhauled per an FAA-approved component 
maintenance manual (CMM) applies to fuel pumps repaired after the 
maintenance programs are revised; spare or on-wing fuel pumps do not 
need to be reworked. For AWLs that require repetitive inspections, the 
initial inspection interval (threshold) starts from the date the 
maintenance program revision specified in paragraph (g) is done, except 
as provided by paragraph (h) of this proposed AD. This proposed AD 
would require only the maintenance program revision specified in 
paragraph (g), and initial inspections specified in paragraph (h). No 
other fleet-wide inspections need to be done.

Changes to Fuel Tank System AWLs

    Paragraph (g) of this proposed AD would require revising the FAA-
approved maintenance program by incorporating certain information 
specified in Section D of Revision March 2006 of Document D6-13747-CMR. 
Paragraph (g) allows accomplishing the maintenance program revision in 
accordance with later revisions of Document D6-13747-CMR as an 
acceptable method of compliance if they are approved by the Manager, 
Seattle Aircraft Certification Office (ACO), FAA. Paragraph (h) allows 
accomplishing the initial inspections and repair in accordance with 
later revisions of Document D6-13747-CMR as an acceptable method of 
compliance if they are approved by the Manager, Seattle ACO. In 
addition, Section D specifies that any deviations from the published 
AWL instructions, including AWL intervals, must be approved by the 
Manager, Seattle ACO. Therefore, after the maintenance program 
revision, any further revision to an AWL or AWL interval should be done 
as an AWL change, not as an alternative method of compliance (AMOC). 
For U.S.-registered airplanes, operators must make requests through an 
appropriate FAA Principal Maintenance Inspector (PMI) or Principal 
Avionics Inspector (PAI) for approval by the Manager, Seattle ACO. A 
non-U.S. operator should coordinate changes with its governing 
regulatory agency.

Exceptional Short-Term Extensions

    Section D of Revision March 2006 of Document D6-13747-CMR has 
provisions for an exceptional short-term extension of 30 days. An 
exceptional short-term extension is an increase in an AWL interval that 
may be needed to cover an uncontrollable or unexpected situation. For 
U.S.-registered airplanes, the FAA PMI or PAI must concur with any 
exceptional short-term extension before it is used, unless the operator 
has identified another appropriate procedure with the local regulatory 
authority. The FAA PMI or PAI may grant the exceptional short-term 
extensions described in Section D without consultation with the 
Manager, Seattle ACO. A non-U.S. operator should coordinate changes 
with its governing regulatory agency. As explained in Revision March 
2006 of Document D6-13747-CMR, exceptional short-term extensions must 
not be used for fleet AWL extensions. An exceptional short-term 
extension should not be confused with an operator's short-term 
escalation authorization approved in accordance with the Operations 
Specifications or the operator's reliability program.

Ensuring Compliance With Fuel Tank System AWLs

    Boeing has revised applicable maintenance manuals and task cards to 
address AWLs and to include notes about CDCCLs. Operators that do not 
use Boeing's revision service should revise their maintenance manuals 
and task cards to highlight actions tied to CDCCLs to ensure that 
maintenance personnel are complying with the CDCCLs. Appendix 1 of this 
proposed AD contains a list of Air Transport Association (ATA) sections 
for the revised maintenance manuals. Operators might wish to use the 
appendix as an aid to implement the AWLs.

Recording Compliance With Fuel Tank System AWLs

    The applicable operating rules of the Federal Aviation Regulations 
(14 CFR parts 91, 121, 125, and 129) require operators to maintain 
records with the identification of the current inspection status of an 
airplane. Some of the AWLs contained in Section D of Revision March 
2006 of Document D6-13747-CMR are inspections for which the applicable 
sections of the operating rules apply. Other AWLs are CDCCLs, which are 
tied to conditional maintenance actions. An entry into an operator's 
existing maintenance record system for corrective action is sufficient 
for recording compliance with CDCCLs, as long as the applicable 
maintenance manual and task cards identify actions that are CDCCLs.

Changes to CMMs Cited in Fuel Tank System AWLs

    Some of the AWLs in Section D of Revision March 2006 of Document 
D6-13747-CMR refer to specific revision levels of the CMMs as 
additional sources of service information for doing the AWLs. Boeing is 
referring to the CMMs by revision level in the applicable AWL for 
certain components rather than including information directly in 
Document D6-13747-CMR because of the volume of that information. As a 
result, the Manager, Seattle ACO, must approve the CMMs. Any later 
revision of those CMMs will be handled like a change to the AWL itself. 
Any use of parts (including the use of parts manufacturer approval 
(PMA) approved parts), methods, techniques, and practices not contained 
in the CMMs need to be approved by the Manager, Seattle ACO, or 
governing regulatory authority. For example, pump repair/overhaul 
manuals must be approved by the Manager, Seattle ACO.

Changes to AMMs Referenced in Fuel Tank System AWLs

    In other AWLs in Section D of Revision March 2006 of Document D6-
13747-CMR, the AWLs contain all the necessary data. The applicable 
section of the maintenance manual is usually included in the AWLs. 
Boeing intended this information to assist operators in maintaining the 
maintenance manuals. A maintenance manual change to these tasks may be 
made without approval by the Manager, Seattle ACO, through an 
appropriate FAA PMI or PAI, by the governing regulatory authority, or 
by using the operator's standard process for revising maintenance 
manuals. An acceptable change would have to maintain the information 
specified in

[[Page 36383]]

the AWL such as the pass/fail criteria or special test equipment.

Costs of Compliance

    There are about 308 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.

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                         Number of
                                           Work                               Cost per     U.S.-
                 Action                   hours             Parts             airplane   registered   Fleet cost
                                                                                         airplanes
----------------------------------------------------------------------------------------------------------------
Maintenance program revision...........        8  None.....................       $640           93      $59,520
Inspections............................        8  None.....................        640           93       59,520
----------------------------------------------------------------------------------------------------------------

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-2007-28385; Directorate Identifier 2006-NM-
181-AD.

Comments Due Date

    (a) The FAA must receive comments on this AD action by August 
17, 2007.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to all Boeing Model 747-100, 747-100B, 747-
100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP 
series airplanes, certificated in any category.

    Note 1: This AD requires revisions to certain operator 
maintenance documents to include new inspections and maintenance 
actions. Compliance with these limitations 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 
limitations, the operator may not be able to accomplish the actions 
described in the revisions. In this situation, to comply with 14 CFR 
43.16 and 91.403(c), the operator must request approval for revision 
to the airworthiness limitations in the Boeing 747-100/200/300/SP 
Airworthiness Limitations (AWLs) and Certification Maintenance 
Requirements (CMRs), D6-13747-CMR, according to paragraph (g) or (i) 
of this AD, as applicable.

Unsafe Condition

    (d) This AD results from a design review of the fuel tank 
systems. We are 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 vapors, could result in a 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 Information Reference

    (f) The term ``Revision March 2006 of Document D6-13747-CMR'' as 
used in this AD, means Boeing 747-100/200/300/SP AWLs and CMRs, D6-
13747-CMR, Revision March 2006. (For the purposes of Revision March 
2006 of Document D6-13747-CMR, the Model 747SR series airplane is 
basically a Model 747-100 series airplane with certain modifications 
to improve fatigue life.)

Maintenance Program Revision

    (g) Before December 16, 2008, revise the FAA-approved 
maintenance program to incorporate the information in Section D of 
Revision March 2006 of Document D6-13747-CMR; except that the 
initial inspections required by paragraph (h) of this AD must be 
done at the applicable compliance time specified in that paragraph. 
Accomplishing the revision in accordance with a later revision of 
Document D6-13747-CMR is an acceptable method of compliance if the 
revision is approved by the Manager, Seattle Aircraft Certification 
Office (ACO), FAA.

Initial Inspections and Repair if Necessary

    (h) Do the inspections specified in Table 1 of this AD and 
repair any discrepancy, in accordance with Section D, 
``AIRWORTHINESS LIMITATIONS--SYSTEMS,'' of Revision March 2006 of 
Document D6-13747-CMR. The repair must be done before further 
flight. Accomplishing the actions required by this paragraph in 
accordance with a later revision of Document D6-13747-CMR is an 
acceptable method of compliance if the revision is approved by the 
Manager, Seattle ACO.


[[Page 36384]]


    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.''


                      Table 1.--Initial Inspections
------------------------------------------------------------------------
                                           Compliance time  (whichever
                                                  occurs later)
       AWL No.           Description   ---------------------------------
                                           Threshold       Grace period
------------------------------------------------------------------------
28-AWL-01............  A detailed       Before the       Within 72
                        inspection of    accumulation     months after
                        external wires   of 36,000        the effective
                        over the         total flight     date of this
                        center fuel      cycles, or       AD.
                        tank for         within 144
                        damaged          months since
                        clamps, wire     the date of
                        chafing, and     issuance of
                        wire bundles     the original
                        in contact       standard
                        with the         airworthiness
                        surface of the   certificate or
                        center fuel      the date of
                        tank.            issuance of
                                         the original
                                         export
                                         certificate of
                                         airworthiness,
                                         whichever
                                         occurs first.
28-AWL-03............  A special        Before the       Within 24
                        detailed         accumulation     months after
                        inspection of    of 36,000        the effective
                        the lightning    total flight     date of this
                        shield to        cycles, or       AD.
                        ground           within 144
                        termination on   months since
                        the out-of-      the date of
                        tank fuel        issuance of
                        quantity         the original
                        indicating       standard
                        system to        airworthiness
                        verify           certificate or
                        functional       the date of
                        integrity.       issuance of
                                         the original
                                         export
                                         certificate of
                                         airworthiness,
                                         whichever
                                         occurs first.
28-AWL-13............  A special        Before the       Within 60
                        detailed         accumulation     months after
                        inspection of    of 36,000        the effective
                        the fault        total flight     date of this
                        current bond     cycles, or       AD.
                        of the fueling   within 144
                        shutoff valve    months since
                        actuator of      the date of
                        the center       issuance of
                        wing tank to     the original
                        verify           standard
                        electrical       airworthiness
                        bond.            certificate or
                                         the date of
                                         issuance of
                                         the original
                                         export
                                         certificate of
                                         airworthiness,
                                         whichever
                                         occurs first.
------------------------------------------------------------------------

Alternative Methods of Compliance (AMOCs)

    (i)(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.

 Appendix 1.--Implementing Fuel Tank System Airworthiness Limitations on Model 747-100, 747-100B, 747-100B SUD,
                    747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP Series Airplanes
----------------------------------------------------------------------------------------------------------------
                                                                 ATA section or CMM
           AWL No.                       ALI/CDCCL                    document                 Task title
----------------------------------------------------------------------------------------------------------------
28-AWL-01....................  ALI..........................  AMM 28-11-00/601........  External Wires Over the
                                                                                         Center Tank Inspection.
28-AWL-02....................  CDCCL........................  SWPM 20-10-11...........  Wiring Assembly and
                                                                                         Installation
                                                                                         Configuration.
28-AWL-03....................  ALI..........................  AMM 05-55-54/601.
28-AWL-04....................  CDCCL........................  SWPM 20-10-15...........  Assembly of Shield
                                                                                         Ground Wires.
28-AWL-05....................  CDCCL........................  AMM 28-22-07/401........  Install the Bulkhead
                                                                                         Fitting for the Engine
                                                                                         Fuel Feed Tube.
28-AWL-06....................  CDCCL........................  AMM 29-11-22/401........  Install the Heat
                                                                                         Exchanger.
28-AWL-07....................  CDCCL........................  CMM 28-22-07, Revision    ........................
                                                               1; CMM 28-31-03,
                                                               Revision 3; CMM 28-22-
                                                               06, Revision 6; CMM 28-
                                                               31-05, Revision 1; CMM
                                                               28-20-02, Revision 4 or
                                                               Revision 9; or
                                                               subsequent revisions.
28-AWL-08....................  CDCCL........................  AMM 28-22-03/401........  Install Boost Pump
                                                                                         Housing.
                                                              AMM 28-31-01/401........  Jettison Pump Motor/
                                                                                         Impeller Unit
                                                                                         Installation.
28-AWL-09....................  ALI..........................  AMM 28-31-00/501........  Operational Test--Fault
                                                                                         Current Detector.
28-AWL-10....................  CDCCL.                                                   ........................
28-AWL-11....................  CDCCL........................  SWPM 20-10-11...........  Wiring Assembly and
                                                                                         Installation
                                                                                         Configuration.
28-AWL-12....................  CDCCL........................  AMM 28-21-02/401........  Install the Refuel Valve
                                                                                         Control Unit.
                                                              AMM 28-21-13/401........  Install Center Wing Tank
                                                                                         Refuel Valve Unit.
28-AWL-13....................  ALI..........................  AMM 28-21-13/601........  Center Wing Tank Refuel
                                                                                         Valve--Fault Current
                                                                                         Bond Inspection.
28-AWL-14....................  CDCCL........................  AMM 28-11-02/401........  Install the Reserve and
                                                                                         Main Tank Access Door.
                                                              AMM 28-11-03/401........  Install the Surge Tank
                                                                                         Access Door.

[[Page 36385]]

 
28-AWL-15....................  CDCCL........................  CMM 28-40-10, Revision    ........................
                                                               13; CMM 28-40-12,
                                                               Revision 9; CMM 28-40-
                                                               16, Revision 1; CMM 28-
                                                               40-14, Revision 8; CMM
                                                               28-40-15, Revision 0;
                                                               or subsequent revisions.
28-AWL-16....................  CDCCL........................  SWPM 20-14-12...........  Repair of Fuel Quantity
                                                                                         Indicator System (FQIS)
                                                                                         Wire Harness.
                                                              AMM 28-41-09/401........  Replace the Fuel Tank
                                                                                         Wire Bundle.
28-AWL-17....................  CDCCL........................  CMM 28-31-22, Revision    ........................
                                                               4; or subsequent
                                                               revisions.
28-AWL-18....................  CDCCL........................  AMM 28-22-00/101........  Engine Fuel Feed System--
                                                                                         Trouble Shooting.
28-AWL-19....................  CDCCL.                                                   ........................
----------------------------------------------------------------------------------------------------------------


    Issued in Renton, Washington, on June 22, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
 [FR Doc. E7-12815 Filed 7-2-07; 8:45 am]
BILLING CODE 4910-13-P