Commercial 

Airplanes 747

Service Bulletin

ALERT

Number: 747-28A2204

Original Issue: December 19, 1996

Revision 3: March 11, 2010

ATA System: 2822

SUBJECT: FUEL - Distribution - Engine Fuel Feed System Outboard Main Tank Boost Pump

Wiring Inspection

Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15

CFR 730-774). An export license may be required before it is used for development, production or use by foreign

persons from specific countries. The controller of this data has the individual responsibility to abide by all export

laws.

ECCN: 9E991

BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET

Copyright © 1996 The Boeing Company

Unpublished Work - All Rights Reserved

Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable

subject matter. Boeing also claims copyright in this document as a compilation and/or collective work.

This document includes proprietary information owned by The Boeing Company and/or one or more third parties.

Treatment of the document and the information it contains is governed by contract with Boeing. For more

information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124.

Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner,

BBJ, DC-8, DC-9, DC-10, KC-10, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and the

Boeing livery are all trademarks owned by The Boeing Company; and no trademark license is granted in

connection with this document unless provided in writing by Boeing.

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5.0
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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT

BLANK PAGE
Table of Contents

Revision Transmittal Sheet ............................................ 5

Summary ...................................................... 7

1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

E. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2. Data supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . . 23

K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

A. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

C. Parts Necessary For Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

1. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2. Parts and Materials Supplied by the Operator: . . . . . . . . . . . . . . . . . . . . . . . . 25

3. Parts Modified and Reidentified: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4. Parts Removed and Not Replaced: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 25

3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

FIGURE 1: BOOST PUMP REFERENCE LOCATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT
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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT

BLANK PAGE
Commercial 

Airplanes 747

Service Bulletin

ALERT

Revision Transmittal Sheet Number: 747-28A2204

Original Issue: December 19, 1996

Revision 3: March 11, 2010

ATA System: 2822

SUBJECT: FUEL - Distribution - Engine Fuel Feed System Outboard Main Tank Boost Pump

Wiring Inspection

This revision includes all pages of the service bulletin.

COMPLIANCE INFORMATION RELATED TO THIS REVISION

Federal Aviation Administration (FAA) Airworthiness Directive FAA AD 97-26-07, is related to this service bulletin.

No more work is necessary on airplanes inspected as shown in the revision 2 of this service bulletin.

747 airplanes line number 1317 - 1419 are added to effectivity.

REASON FOR REVISION

This revision is sent to tell operators that Compliance is revised. Operators have reported finding fuel pump wire

bundle chafing of Teflon sleeving, jacket and wire installation before 30,000 flight cycles, or 60,000 flight hours.

The wire bundle chafing could possibly wear away the sleeving, jacket and wire installation and expose metal

conductors, which could result in electrical arcing. Boeing recommends that the operators accomplish the wiring

inspection given in this service bulletin within 15,000 flight hours from the last inspection, or 6,000 flight hours

from the date of this revision, whichever occurs later, but not to exceed 60,000 flight hours from the last inspection.

The inspection will be required to be repeated every 15,000 flight hours from the previous inspection.

Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity, to show the location

of important changes.

Airplanes are added to effectivity. Refer to Paragraph 1.A., Effectivity.

Pages with no vertical lines have no important changes.

REVISION HISTORY

Original Issue: December 19, 1996

Revision 1: October 30, 1997

Revision 2: September 01, 2005

Revision 3: March 11, 2010

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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT

BLANK PAGE
Commercial 

Airplanes 747

Service Bulletin

ALERT

Summary Number: 747-28A2204

Original Issue: December 19, 1996

Revision 3: March 11, 2010

ATA System: 2822

SUBJECT: FUEL - Distribution - Engine Fuel Feed System Outboard Main Tank Boost Pump

Wiring Inspection

THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH

1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO

THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO

THE NEW OWNER.

CONCURRENT REQUIREMENTS

Boeing service bulletin 747-28A2092 or 747-28A2165, is necessary to be accomplished prior to or concurrent

with this service bulletin.

BACKGROUND

This inspection will make sure the number 1 and number 4 main fuel tank boost pump wiring is not chafed and

will not cause arcing inside the fuel tank.

The number 1 and number 4 main fuel tank boost pump wiring is installed with a double layer of Teflon sleeving

in the conduit. The sleeving is installed to prevent arcing between the boost pump power wiring and the conduit

caused by wire chafing.

747 airplanes cumulative line numbers 329, 348 and 356 and on had the two sleeves installed in production.

All other airplanes were the subject of Alert Service Bulletin 747-28A2092 or 747-28A2165 which inspected the

boost pump wiring for damage and installed the two sleeves.

747 airplanes cumulative line numbers 001-432 have aluminum conduits for the main tank boost pumps. All

other 747 airplanes have stainless steel conduits. If the boost pump power wiring shorts to the conduit, it is more

likely that the aluminum conduit can melt and make a hole. This could result in a fuel leak, fire or an explosion.

We have not been told that chafed wires have caused any conduits to be melted through since Service Bulletin

747-28A2092 was issued.

ACTION

Remove the number 1 and number 4 main tank forward and aft boost pump cover plates. Remove the boost

pump wire bundle from the conduit. Inspect the sleeving/wire bundle for damage. Install the boost pump cover

plates. Do a test of the boost pumps.

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EFFECTIVITY

All 747 Airplanes line number 0001-1419.

Refer to Paragraph 1.A.1., Airplanes for the list of affected airplanes.

COMPLIANCE

Refer to Paragraph 1.E., Compliance.

For all 747 series airplanes, certificated in any category, FAA AD 97-26-07, is related to this service bulletin and

supersedes FAA AD 96-26-06, Amendment 39-9870.

INDUSTRY SUPPORT INFORMATION

Boeing warranty remedies are not available for the inspection given in this service bulletin.

MANPOWER

Total Man-hours - 4.0 for each airplane Elapsed Time - 2.0 Hours

MATERIAL INFORMATION

Operator Supplied Parts

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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT

BLANK PAGE
Commercial 

Airplanes 747

Service Bulletin

ALERT

Number: 747-28A2204

Original Issue: December 19, 1996

Revision 3: March 11, 2010

ATA System: 2822

SUBJECT: FUEL - Distribution - Engine Fuel Feed System Outboard Main Tank Boost Pump

Wiring Inspection

THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH

1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO

THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO

THE NEW OWNER.

1. PLANNING INFORMATION

A. Effectivity

1. Airplanes

Refer to Service Bulletin Index Document D6-30300, Part 3 for Airplane Variable Number, Line

Number, and Serial Number data.

This service bulletin is for the airplanes shown below.

GROUP CONFIGURATION DESCRIPTION

1 - All 747 Airplanes Line Numbers 0001-1419

Airplane Models:

747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400,

747-400D, 747-400F, 747SP, 747SR

Variable Number Group

RA001 - RA034 1

RA101 - RA115 1

RA161 - RA164 1

RA201 - RA203 1

RA216 - RA217 1

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Variable Number Group

RA245 - RA246 1

RA251 - RA266 1

RA301 - RA318 1

RA351 - RA360 1

RA369 - RA373 1

RA401 - RA418 1

RA501 - RA502 1

RA521 - RA528 1

RA532 - RA548 1

RA551 - RA552 1

RA559 - RA561 1

RA581 - RA582 1

RA585 1

RA601 - RA602 1

RA631 - RA635 1

RA651 - RA652 1

RA671 - RA677 1

RA701 - RA702 1

RA721 - RA731 1

RA741 - RA745 1

RA749 - RA750 1

RA761 - RA762 1

RA781 - RA784 1

RA901 - RA916 1

RB001 - RB016 1

RB041 - RB044 1

RB071 - RB075 1

RB101 - RB102 1

RB411 - RB413 1

RB421 1

RB601 - RB607 1

RB681 - RB697 1

RB711 1

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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT
Variable Number Group

RB721 - RB723 1

RB741 - RB748 1

RD001 - RD004 1

RD021 - RD022 1

RD041 - RD059 1

RD071 - RD072 1

RD081 - RD083 1

RD091 - RD092 1

RD101 - RD104 1

RD121 - RD127 1

RD131 - RD144 1

RD166 - RD167 1

RD171 - RD172 1

RD181 - RD183 1

RD201 - RD204 1

RD221 - RD227 1

RD231 - RD235 1

RD241 - RD243 1

RD251 - RD262 1

RD271 - RD272 1

RD291 - RD292 1

RD301 - RD302 1

RD311 1

RD351 - RD358 1

RD361 - RD366 1

RD381 - RD383 1

RD411 - RD414 1

RD421 - RD426 1

RD431 - RD435 1

RD441 - RD442 1

RD451 - RD456 1

RD461 1

RD471 - RD475 1

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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT
Variable Number Group

RD513 - RD519 1

RD531 - RD533 1

RD551 1

RD561 1

RD571 1

RD581 - RD583 1

RD591 - RD593 1

RD601 - RD607 1

RD621 - RD623 1

RD641 - RD649 1

RD651 - RD659 1

RD661 1

RD671 1

RD681 - RD682 1

RD691 - RD692 1

RD701 - RD702 1

RD721 - RD722 1

RD741 - RD742 1

RD751 - RD755 1

RD761 1

RD771 - RD775 1

RD781 - RD783 1

RD791 - RD792 1

RE001 1

RF001 - RF006 1

RG001 - RG009 1

RG091 1

RG095 1

RG101 - RG104 1

RG121 - RG126 1

RG141 - RG142 1

RG161 - RG164 1

RG171 - RG174 1

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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT
Variable Number Group

RG191 - RG193 1

RG211 - RG213 1

RG221 - RG222 1

RH101 - RH102 1

RH111 - RH112 1

RH121 - RH122 1

RJ131 - RJ133 1

RJ151 - RJ152 1

RJ301 - RJ303 1

RJ321 - RJ322 1

RJ331 - RJ333 1

RL401 - RL403 1

RL411 - RL436 1

RL451 - RL456 1

RL461 - RL462 1

RL471 - RL481 1

RL491 - RL492 1

RL501 - RL502 1

RL511 - RL516 1

RL521 - RL522 1

RL531 - RL534 1

RL551 1

RL561 - RL568 1

RL571 - RL572 1

RL576 - RL577 1

RL579 1

RL581 - RL586 1

RL651 - RL655 1

RL671 - RL675 1

RL681 - RL684 1

RL751 - RL752 1

RM001 - RM007 1

RM010 - RM013 1

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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT
Variable Number Group

RM021 - RM024 1

RM026 - RM030 1

RM036 - RM045 1

RM051 - RM053 1

RM071 1

RM081 - RM084 1

RM091 1

RM096 - RM097 1

RM116 - RM117 1

RM126 - RM132 1

RM136 - RM147 1

RM156 - RM158 1

RM166 - RM177 1

RM191 - RM192 1

RM231 - RM233 1

RM241 - RM246 1

RM261 - RM264 1

RM316 - RM318 1

RM331 - RM333 1

RM341 1

RM351 - RM355 1

RM366 - RM367 1

RM401 - RM403 1

RM426 1

RM431 1

RM441 - RM443 1

RM445 1

RM801 - RM803 1

RM811 - RM813 1

RM851 - RM859 1

RM861 - RM863 1

RM871 - RM899 1

RM901 - RM906 1

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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT
Variable Number Group

RM911 1

RR001 - RR005 1

RR021 - RR025 1

RR031 1

RR201 - RR206 1

RR221 - RR226 1

RR261 - RR267 1

RR301 - RR310 1

RR331 - RR332 1

RR336 1

RR341 - RR345 1

RR361 - RR362 1

RR421 - RR422 1

RR431 - RR432 1

RR441 - RR442 1

RR451 1

RR501 - RR504 1

RR521 - RR522 1

RR526 1

RR531 1

RR551 - RR556 1

RR561 1

RR566 1

RR701 1

RR721 - RR724 1

RR746 - RR748 1

RR851 - RR856 1

RR861 - RR862 1

RR951 - RR952 1

RS001 - RS002 1

RS201 1

RS211 - RS212 1

RS221 - RS222 1

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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT
Variable Number Group

RS231 - RS241 1

RS251 - RS259 1

RS263 1

RS265 - RS268 1

RS271 - RS276 1

RS291 - RS292 1

RS301 - RS306 1

RS311 - RS320 1

RS331 - RS333 1

RS341 - RS342 1

RS699 1

RS701 - RS703 1

RS711 - RS713 1

RS721 - RS722 1

RS731 - RS732 1

RS741 - RS743 1

RS751 - RS752 1

RS761 - RS762 1

RS771 1

RS781 - RS782 1

RS786 1

RT001 - RT014 1

RT021 - RT022 1

RT031 - RT035 1

RT041 - RT047 1

RT061 1

RT071 - RT075 1

RT101 - RT103 1

RT121 1

RT131 - RT137 1

RT151 - RT152 1

RT161 - RT168 1

RT401 - RT412 1

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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT
Variable Number Group

RT431 - RT447 1

RT451 - RT469 1

RT471 - RT499 1

RT501 - RT535 1

RT551 - RT568 1

RT571 - RT591 1

RT601 - RT657 1

RT671 - RT673 1

RT681 - RT682 1

RT691 - RT699 1

RT701 - RT704 1

RT711 - RT717 1

RT741 - RT757 1

RT776 - RT777 1

RT781 - RT784 1

RT801 - RT803 1

RT811 - RT814 1

RT831 - RT837 1

RT861 - RT864 1

RT876 - RT880 1

RT931 - RT932 1

RT945 - RT949 1

RT951 - RT955 1

RT966 - RT967 1

RU001 - RU006 1

RU016 - RU017 1

RU031 - RU032 1

RU051 - RU052 1

RU059 - RU062 1

RU081 - RU083 1

RU101 - RU102 1

RU121 - RU132 1

RU801 - RU809 1

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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT
Variable Number Group

RU831 - RU841 1

2. Spares Affected

None.

B. Concurrent Requirements

Boeing service bulletin 747-28A2092 or 747-28A2165, is necessary to be accomplished prior to or

concurrent with this service bulletin.

C. Reason

This inspection will make sure the number 1 and number 4 main fuel tank boost pump wiring is not

chafed and will not cause arcing inside the fuel tank.

The number 1 and number 4 main fuel tank boost pump wiring is installed with a double layer of teflon

sleeving in the conduit. The sleeving is installed to prevent arcing between the boost pump power

wiring and the conduit caused by wire chafing.

747 airplanes cumulative line numbers 329, 348 and 356 and on had the two sleeves installed in

production. All other airplanes were the subject of Alert Service Bulletin 747-28A2092 or 747-28A2165

which inspected the boost pump wiring for damage and installed the two sleeves.

747 airplanes cumulative line numbers 001-432 have aluminum conduits for the main tank boost pumps.

All other 747 airplanes have stainless steel conduits. If the boost pump power wiring shorts to the

conduit, it is more likely that the aluminum conduit can melt and make a hole. This could result in a

fuel leak, fire or an explosion.

We have not been told that chafed wires have caused any conduits to be melted through since Service

Bulletin 747-28A2092 or 747-28A2165 was issued.

Revision 1 is sent to add airplanes delivered after line number 432. A repeat inspection is added for

all 747 airplanes.

Revision 2 is sent to tell operators that airplanes line number 1121-1316 were added to the effectivity.

Also, steps have been added to the referenced airplane maintenance manual sections to amplify and

clarify the expected inspection procedures.

Revision 3 is sent to tell operators that Compliance is revised. Operators have reported finding fuel

pump wire bundle chafing before 30,000 flight cycles, or 60,000 flight hours. The wire bundle chafing

could possibly wear away the sleeving, jacket and wire installation and expose metal conductors, which

could result in electrical arcing. Boeing recommends that the operators accomplish the wiring inspection

given in this service bulletin within 15,000 flight hours from the last inspection, or 6,000 flight hours

from the date of this revision, whichever occurs later, but not to exceed 60,000 flight hours from the

last inspection. The inspection will be required to be repeated every 15,000 flight hours from the previous

inspection.

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BOEING SERVICE BULLETIN 747-28A2204

ALERT ALERT
D. Description

The number 1 and number 4 main tank forward and aft boost pump cover plates are removed. The

boost pump wire bundle is removed from the conduit. The sleeving/wire bundle is inspected for damage.

The boost pump cover plates are installed. A test of the boost pumps is done.

Revision 1 - No more work is necessary on airplanes changed as shown in the initial release of this

service bulletin.

This inspection assumes that service bulletin 747-28A2092 or 747-28A2165 has been incorporated.

Revision 2 - No more work is necessary on airplanes changed as shown in the initial release and the

Revision 1 of this service bulletin.

Revision 3 - No more work is necessary on airplanes inspected as shown in revision 2 of this service

bulletin.

PLEASE SEND A REPORT OF YOUR INSPECTION PROGRAM. ALSO, SEND THE INSPECTION

RESULTS WHEN EACH INSPECTION IS COMPLETE.

SEND TO:

BOEING COMMERCIAL AIRPLANE GROUP ATTENTION: MANAGER, AIRLINE SUPPORT

The work in this service bulletin is done in the maintenance zone(s) given below.

Affected Maintenance Zones

Model Zone

747-100, 747-100B, 747-100B 544, 545, 644, 645

SUD, 747-200B, 747-200C,

747-200F, 747-300, 747-400,

747-400D, 747-400F, 747SP,

747SR

E. Compliance

For all 747 series airplanes, certificated in any category, FAA AD 97-26-07, Amendment 39-10250, is

related to this service bulletin and supersedes FAA AD 96-26-06, Amendment 39-9870.

Boeing recommends that the operators accomplish the wiring inspection given in this service bulletin

within 15,000 flight hours from the last inspection, or 6,000 flight hours from the date of this revision,

whichever occurs later, but not to exceed 60,000 flight hours from the last inspection. The inspection

will be required to be repeated every 15,000 flight hours from the previous inspection.

F. Approval

This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified

in this service bulletin comply with the applicable regulations and are FAA approved, as well as European

Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved airplanes listed in the service

bulletin effectivity. This service bulletin and its approval were based on the airplane in its original Boeing

delivery configuration or as modified by other approved Boeing changes.

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If an airplane has a non-Boeing modification or repair that affects a component or system also affected

by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval

before incorporating this service bulletin.

This service bulletin has been approved by the FAA. In addition, the Manager of the FAA Seattle Aircraft

Certification Office approves the inspection and the replacement, as required, of the wire bundle and

sleeves of the boost pumps of the numbers 1 and 4 main fuel tanks, and of the auxiliary tank jettison

pumps (if installed), as described in this service bulletin, as an alternative method of compliance with

the requirements of paragraphs (a), (b), (c), (d) and (e) of FAA AD 97-26-07. All provisions of FAA AD

97-26-07 that are not specifically referenced in the above statement remain fully applicable and must

be met.

G. Manpower

The table below shows an estimate of the task-hours necessary to do this inspection for each airplane.

This estimate is for direct labor only, done by an experienced crew. Adjust the estimate with operator

task-hour data if necessary. The estimate does not include lost time. These are some examples of lost

time:

— Time to adjust to the workplace

— Time to schedule the work

— Time to examine the work

— Time to cure the materials

— Time to make the parts

— Time to find the tools.

Number of Per- Task-Hours Elapsed Hours

sons

Task

Inspect 2 4 2

TOTAL FOR EACH AIRPLANE 4 2

H. Weight and Balance Changes

None.

I. Electrical Load Data

Not changed.

J. References

1. Existing Data:

a. Boeing Service Bulletin 747-28A2092, 747-28A2165

b. Federal Aviation Administration (FAA) Airworthiness Directive 96-26-06, 97-26-07

c. Standard Wiring Practices Manual (SWPM) 20-10-11, 20-10-12

d. 747-400 Aircraft Maintenance Manual (AMM) 28-22-03, 28-22-06

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ALERT ALERT
2. Data supplied with this Service Bulletin:

None.

3. Installation Drawings Used in the Preparation of this Service Bulletin:

These drawings were used to prepare this service bulletin. These drawings are not necessary to

make the specified changes, and are not supplied with this service bulletin. These drawings may

not be applicable to all airplane configurations or operators.

Drawing Number Title

65B92401 Fuel Boost Pump Installation

65B92482 Plumbing Instl. - Fuel Feed, Auxiliary Tanks 1A and 4A

K. Publications Affected

1. Publications:

None.

2. Damage Tolerance Based Structural Inspections:

Boeing has evaluated the repairs and/or changes in this service bulletin for effects on Fatigue

Critical Structure (FCS) and for changes to Damage Tolerance Inspections (DTI) required in the

Maintenance Program. This service bulletin does not affect FCS, therefore DTIs are not necessary.

L. Interchangeability and Intermixability of Parts

Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts.

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ALERT ALERT

BLANK PAGE
2. MATERIAL INFORMATION

A. Material - Price and Availability

None.

B. Industry Support Information

Boeing warranty remedies are not available for the inspection given in this service bulletin.

C. Parts Necessary For Each Airplane

1. Kits/Parts:

None.

2. Parts and Materials Supplied by the Operator:

None.

3. Parts Modified and Reidentified:

None.

4. Parts Removed and Not Replaced:

None.

D. Parts Necessary to Change Spares

None

E. Special Tooling - Price and Availability

None.

F. Special Tooling Necessary to do this Service Bulletin

No special tools or equipment are necessary to do the change in this service bulletin. But, maintenance

and overhaul tools in the manuals given in Paragraph 1.J., References, can be necessary. Examine

operator tool supply to make sure all necessary tools are available.

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ALERT ALERT

BLANK PAGE
3. ACCOMPLISHMENT INSTRUCTIONS

A. GENERAL INFORMATION

CAUTION: KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF METAL

PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED MATERIAL,

METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE BUNDLES CAN CAUSE

DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES CAN CAUSE SPARKS OR

OTHER ELECTRICAL DAMAGE.

NOTE: 1. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for

definition of the acronyms.

2. Obey all of the warnings and cautions given in the specified manual sections.

3. Refer to the Boeing Standard Wiring Practices Manuals SWPM 20-10-11 and SWPM

20-10-12 for the wire installation procedures.

B. WORK INSTRUCTIONS

1. Do the inspection of the wire bundle inside the conduit.

a. On all except 747-400 airplanes, refer to 747-400 AMM 28-22-03, Main Tank Boost Pump

Wiring - Inspection/Check. On airplanes RD121 and RJ151 only, this inspection must be done

on the auxiliary jettison pump wire bundles, if the pumps are installed. Refer to the 747 AMM

for the access and test data for these pumps. The inspection procedure is the same as

mentioned above for the main tank boost pumps.

b. On 747-400 airplanes, refer to 747-400 AMM 28-22-06, Main Tank Boost Pump Wiring -

Inspection/Check.

2. Put the airplane back into serviceable condition.

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ALERT ALERT
FIGURE 1: BOOST PUMP REFERENCE LOCATOR

(SHEET 1 OF 1)

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ALERT ALERT