Commercial 

Airplanes 737

Service Bulletin

Number: 737-28A1210

Original Issue: August 02, 2010

Revision 1: May 13, 2011

ATA System: 2822

SUBJECT: FUEL- Engine Fuel Feed System - Replacement of the P5-2 Fuel System Module to

Supply Low Fuel Pressure Master Caution Annunciation

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BOEING SERVICE BULLETIN 737-28A1210

BLANK PAGE
Table of Contents

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

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

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

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

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

2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

E. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

2. Data supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . . 26

K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

A. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

C. Parts Necessary For Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

1. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

2. Parts and Materials Supplied by the Operator: . . . . . . . . . . . . . . . . . . . . . . . . 29

3. Parts Modified and Reidentified: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4. Parts Removed and Not Replaced: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 31

3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

FIGURE 1: MASTER CAUTION SYSTEM - P5-2 FUEL SYSTEM MODULE - REPLACEMENT [Group 2]

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

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BOEING SERVICE BULLETIN 737-28A1210

BLANK PAGE
Commercial 

Airplanes 737

Service Bulletin

Revision Transmittal Sheet Number: 737-28A1210

Original Issue: August 02, 2010

Revision 1: May 13, 2011

ATA System: 2822

SUBJECT: FUEL- Engine Fuel Feed System - Replacement of the P5-2 Fuel System Module to

Supply Low Fuel Pressure Master Caution Annunciation

This revision includes all pages of the service bulletin.

COMPLIANCE INFORMATION RELATED TO THIS REVISION

No more work is necessary on the airplane(s) changed in accordance with the original issue of this service

bulletin.

REASON FOR REVISION

This revision puts airplanes from Groups 3 thru 28 together into Group 2, of the service bulletin effectivity, to

resolve interchangeability problems. Airplanes line numbers 1 thru 291 stay in Group 1 and are not affected by

this revision. Groups in the original issue were based on the P5-2 Fuel System Module dash number, delivered

on each airplane. But new P5-2 Fuel System Module dash numbers were created, after the airplanes were

delivered, that are interchangeable with older P5-2 Fuel System Modules. As a result, some operators, that

installed P5-2 Fuel System Module part numbers interchangeable with the ones delivered on their airplane, may

not be able to accomplish the original issue. Reference to Federal Aviation Administration (FAA) Airworthiness

Directive AD 2001-08-24 and Boeing Fleet Team Digest (FTD) 737 FTD 28-04003 are also added.

These sections are changed:

1. Summary, Background: Added reference to the Fleet Team Digest (FTD) 737 FTD 28-04003 and Federal

Aviation Administration (FAA) Airworthiness Directive AD 2001-08-24 and corrected wording.

2. Summary, Action: Changed applicability from Groups 2 thru 28 to Group 2. Text changed to match step 3

of work instructions.

3. Paragraph 1.A.1., Effectivity: Changed applicability from Groups 2 thru 28 to Group 2. New Groups defined

by airplane line number.

4. Paragraph 1.B., Concurrent Requirements: Changed applicability from Groups 2 thru 28 to Group 2.

5. Paragraph 1.C., Reason: Added reference to the Fleet Team Digest (FTD) 737 FTD 28-04003 and Federal

Aviation Administration (FAA) Airworthiness Directive AD 2001-08-24 and and corrected wording.

6. Paragraph 1.D., Description: Changed applicability from Groups 2 thru 28 to Group 2. Text changed to

match step 3 of work instructions. Maintenance Zone tables changed to match new Groups.

7. Paragraph 1.G., Manpower: Changed applicability from Groups 2 thru 28 to Group 2. Manpower tables

changed to match new Groups and Group column removed. Man hours put together in Figure 1.

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8. Paragraph 1.J.1., References: Added Fleet Team Digest (FTD) 737 FTD 28-04003. Corrected Service

Bulletin Index to D6-19567. Updated list to latest format and removed references not used in the service

bulletin.

9. Paragraph 1.K., Publications Affected: Removed IPC chapter 28-22 and added AMM chapter 28-22 and

IPC chapters 11-30, 28-11, 28-41, 28-42, 31-11, and 73-00.

10. Paragraph 1.L., Interchangeability and Intermixability of Parts: Added Reference to Paragraph 2.C., Parts

Necessary for Each Airplane.

11. Paragraph 2.C.2., Parts and Materials Supplied by the Operator: Added note for Group 1 airplanes, updated

table to remove Groups and changed footnote.

12. Paragraph 2.C.3., Parts Modified and Reidentified: Added note for Group 1 airplanes and table for Group

2.

13. Paragraph 2.D., Parts Necessary to Change Spares: Added note for Group 1 airplanes and Group 2

applicability.

14. Paragraph 3.A., General Notes: Notes updated. Removed notes that are not necessary.

15. Paragraph 3.B., Work Instructions: Changed applicability from Groups 2 thru 28 to Group 2. Instructions

changed to combine work for 737/200 and 737-300/400/500. Added note about concurrent service bulletin.

16. Figure 1: Changed applicability from Group 2 thru 13 to Group 2. Changed title to make figure a replacement.

Added applicable work from Figures 2 thru 4. Part number table removed - duplicated in Paragraph 2.C.2.,

Parts and Materials Supplied by the Operator. Added new footnotes.

17. Figures 2, 3 and 4: Removed. Not needed because of Group changes and changes to Figure 1 above.

The data given in Information Notice 737-28A1210 IN 01 and 737-28A1210 IN 02 is included in this revision.

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

of important changes.

Pages with no vertical lines have no important changes.

REVISION HISTORY

Original Issue: August 02, 2010

Revision 1:

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BOEING SERVICE BULLETIN 737-28A1210
Commercial 

Airplanes 737

Service Bulletin

Summary Number: 737-28A1210

Original Issue: August 02, 2010

Revision 1: May 13, 2011

ATA System: 2822

SUBJECT: FUEL- Engine Fuel Feed System - Replacement of the P5-2 Fuel System Module to

Supply Low Fuel Pressure Master Caution Annunciation

CONCURRENT REQUIREMENTS

Refer to Paragraph 1.B., Concurrent Requirements.

BACKGROUND

This service bulletin is the result of fuel system safety analysis done by Boeing under Special Federal Aviation

Regulation (SFAR) 88, Fuel Tank System Fault Tolerance Evaluation Requirements. Results from the fuel

system safety analysis show that fuel boost pumps that run dry could cause an overheat condition external to

the fuel boost pump explosion resistance area, that is open to the fuel boost pump inlet. An overheat condition

in this area could possibly cause an unwanted ignition source for the fuel vapors in the fuel tank and could cause

a fire or explosion.

This service bulletin gives instructions to replace the P5-2 Fuel System Module installed in the flight deck with

a changed P5-2 Fuel System Module. The changed P5-2 Fuel System Module has new Master Caution logic

that gives the necessary indication to the flight crew so that the fuel boost pumps can be turned off and not

operate dry.

The new P5-2 Fuel System Module lets the Master Caution light come on when only one center or auxiliary tank

fuel boost pump low pressure light is on for 10 seconds. Before this change, the Master Caution light came on

when both center tank fuel boost pumps or both auxiliary tank fuel boost pumps had low pressure. All of the

equipment and wiring changes to the Master Caution System are internal to the P5-2 Fuel System Module.

Boeing Fleet Team Digest (FTD) 737 FTD 28-04003 is related to this service bulletin.

Federal Aviation Administration (FAA) Airworthiness Directive AD 2001-08-24 is related to this service bulletin,

but does not mandate the change.

ACTION (PRR 35440-20R)

Group 1:

Operators with Group 1 airplanes should contact Boeing to get engineering and accomplishment instructions

for this change and do the instructions.

Group 2:

In the flight compartment, at the P5 overhead panel, remove the P5-2 Fuel System Module. Install a changed,

or new P5-2 Fuel System Module. Do a test to make sure that the P5-2 Fuel System Module operates correctly.

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EFFECTIVITY

All 737-100/-200/-200C/-300/-400/-500 airplanes. Refer to Service Bulletin Paragraph 1.A.1 for effectivity.

COMPLIANCE

The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service

bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin

mandatory.

Boeing recommends that the change given in this service bulletin be done within 36 months after the original

issue date of this service bulletin.

Group 1:

Operators with Group 1 airplanes should contact Boeing to get engineering and accomplishment instructions

for this change and do the instructions.

INDUSTRY SUPPORT INFORMATION

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

MANPOWER

Refer to Paragraph 1.G., Manpower.

MATERIAL INFORMATION

Operator Supplied Parts/Materials.

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BOEING SERVICE BULLETIN 737-28A1210

BLANK PAGE
Commercial 

Airplanes 737

Service Bulletin

Number: 737-28A1210

Original Issue: August 02, 2010

Revision 1: May 13, 2011

ATA System: 2822

SUBJECT: FUEL- Engine Fuel Feed System - Replacement of the P5-2 Fuel System Module to

Supply Low Fuel Pressure Master Caution Annunciation

1. PLANNING INFORMATION

A. Effectivity

1. Airplanes

This service bulletin is for the airplanes shown below. Refer to PRR 35440-20R for data about this

change.

Refer to Service Bulletin Index D6-19567, Part 3 for Airplane Variable Number, Line Number, and

Serial Number data.

GROUP CONFIGURATION DESCRIPTION

1 - 737-100/200/200C airplanes, line numbers 1 thru 291.

2 - 737-200/200C/300/400/500 airplanes, line numbers 292 thru 3132.

Airplane Models:

737-100, 737-200, 737-200C, 737-300, 737-400, 737-500

Variable Number Group

PA001 - PA022 1

PA099 1

PA231 - PA232 1

PC001 - PC005 1

PG001 - PG075 1

PG199 1

PG201 - PG230 1

PG251 - PG255 1

PG271 - PG279 1

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Variable Number Group

PG301 - PG314 1

PG331 - PG332 1

PG351 - PG356 1

PG375 1

PG401 - PG403 1

PG431 - PG442 1

PG471 - PG475 1

PG501 - PG505 1

PG571 - PG583 1

PG584 - PG586 2

PG621 - PG630 1

PG651 - PG652 1

PG701 - PG705 1

PH001 2

PH011 - PH013 2

PH021 - PH024 2

PH701 - PH715 1

PH731 - PH732 1

PH741 - PH742 1

PH743 2

PJ001 - PJ002 1

PJ003 - PJ009 2

PJ031 - PJ032 1

PJ071 - PJ072 1

PJ101 - PJ104 1

PJ105 - PJ119 2

PJ201 - PJ219 2

PJ301 - PJ302 2

PJ551 - PJ561 2

PJ601 - PJ615 2

PJ811 2

PJ816 - PJ817 2

PK026 - PK029 2

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BOEING SERVICE BULLETIN 737-28A1210
Variable Number Group

PK041 - PK053 2

PK061 - PK070 2

PK081 - PK082 2

PK091 - PK099 2

PK101 - PK103 2

PK111 - PK120 2

PK141 - PK146 2

PK201 - PK204 2

PK211 - PK223 2

PK231 - PK241 2

PK251 - PK258 2

PK271 - PK274 2

PK281 - PK289 2

PK291 2

PK301 - PK318 2

PK341 2

PK351 - PK361 2

PK391 2

PK431 - PK433 2

PK451 - PK452 2

PK461 - PK469 2

PK495 2

PK501 - PK504 2

PK511 - PK515 2

PK519 2

PK521 - PK528 2

PK541 - PK565 2

PK581 2

PK591 - PK599 2

PK601 - PK617 2

PK621 - PK637 2

PK641 - PK642 2

PK661 - PK666 2

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BOEING SERVICE BULLETIN 737-28A1210
Variable Number Group

PK671 - PK681 2

PK691 - PK697 2

PK711 - PK716 2

PK731 - PK765 2

PK771 - PK779 2

PK801 - PK804 2

PK819 - PK827 2

PK830 2

PK861 - PK863 2

PK871 - PK874 2

PK881 - PK884 2

PK901 - PK938 2

PK971 - PK974 2

PL001 - PL028 2

PL061 2

PL081 2

PL101 - PL113 2

PL151 2

PL171 - PL172 2

PL201 - PL203 2

PL221 2

PL401 - PL417 2

PL421 2

PL441 2

PL451 - PL456 2

PL471 2

PL491 2

PL501 - PL506 2

PL551 - PL562 2

PL581 2

PL601 - PL603 2

PL611 2

PL621 - PL626 2

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BOEING SERVICE BULLETIN 737-28A1210
Variable Number Group

PL631 - PL632 2

PL711 - PL712 1

PL716 1

PL717 - PL747 2

PL756 2

PL758 2

PL761 - PL770 2

PL781 - PL788 2

PL793 2

PL801 - PL803 1

PM001 - PM006 2

PM016 - PM017 2

PM021 - PM023 2

PM051 - PM066 2

PM101 - PM119 2

PM141 - PM142 2

PM171 2

PM181 2

PM251 - PM255 2

PM281 - PM283 2

PM381 - PM399 2

PM401 - PM417 2

PM541 - PM564 2

PN001 - PN002 2

PN021 - PN043 2

PN081 - PN086 2

PN101 - PN117 2

PN131 - PN163 2

PN401 - PN420 2

PN431 - PN433 2

PN451 - PN456 2

PN471 - PN474 2

PN481 2

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BOEING SERVICE BULLETIN 737-28A1210
Variable Number Group

PN491 - PN493 2

PN501 - PN502 2

PN511 - PN512 2

PN521 2

PP001 - PP054 2

PP101 - PP169 2

PP181 - PP199 2

PP201 - PP205 2

PP221 2

PP231 - PP243 2

PP281 - PP286 2

PP301 - PP305 2

PP351 - PP353 2

PP376 - PP384 2

PP391 - PP393 2

PP401 - PP440 2

PP471 - PP475 2

PP501 - PP522 2

PP631 - PP634 2

PP651 - PP652 2

PP671 - PP699 2

PP701 - PP733 2

PP771 - PP779 2

PP801 - PP808 2

PP821 - PP827 2

PP831 - PP848 2

PP851 - PP852 2

PP861 - PP877 2

PP891 - PP899 2

PP901 - PP936 2

PP946 - PP948 2

PP951 - PP952 2

PP961 - PP967 2

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BOEING SERVICE BULLETIN 737-28A1210
Variable Number Group

PP981 - PP991 2

PP993 2

PQ001 - PQ016 2

PQ026 - PQ041 2

PQ051 - PQ092 2

PQ101 - PQ199 2

PQ201 - PQ202 2

PQ221 - PQ237 2

PQ241 - PQ243 2

PQ251 - PQ267 2

PQ281 - PQ299 2

PQ301 - PQ307 2

PQ331 - PQ332 2

PQ341 - PQ348 2

PQ361 - PQ373 2

PQ391 - PQ395 2

PQ401 - PQ418 2

PQ421 2

PQ431 - PQ438 2

PQ447 - PQ448 2

PQ451 2

PQ454 2

PQ471 - PQ475 2

PQ479 - PQ481 2

PQ486 - PQ487 2

PQ491 - PQ493 2

PQ771 - PQ772 2

PQ791 - PQ793 2

PQ801 - PQ805 2

PQ931 - PQ935 2

PQ951 2

PQ971 - PQ997 2

PR001 - PR017 2

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BOEING SERVICE BULLETIN 737-28A1210
Variable Number Group

PR021 - PR034 2

PR041 - PR045 2

PR061 - PR072 2

PR077 - PR082 2

PR091 - PR092 2

PR096 2

PR101 2

PR121 - PR122 2

PR131 - PR132 2

PR141 - PR143 2

PR161 - PR172 2

PR181 2

PS601 - PS631 2

PS636 - PS638 2

PS641 - PS644 2

PS651 - PS657 2

PS666 - PS669 2

PS691 - PS692 2

PS701 - PS706 2

PS751 - PS799 2

PS811 2

PS836 - PS837 2

PS841 - PS846 2

PS851 - PS852 2

PS856 2

PS861 - PS863 2

PS866 - PS868 2

PS871 - PS874 2

PS896 - PS897 2

PS901 - PS941 2

PS956 - PS957 2

PS961 - PS963 2

PS971 - PS978 2

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BOEING SERVICE BULLETIN 737-28A1210
Variable Number Group

PT001 - PT015 2

PT021 - PT031 2

PT041 - PT064 2

PT101 - PT105 2

PT121 - PT138 2

PT146 - PT148 2

PT161 - PT170 2

PT181 - PT188 2

PT211 - PT220 2

PT295 2

PT301 - PT309 2

PT331 - PT360 2

PT381 - PT399 2

PT401 - PT438 2

PT501 - PT517 2

PT561 - PT565 2

PT581 - PT586 2

PT611 - PT621 2

PT641 - PT644 2

PT651 - PT656 2

PT671 - PT672 2

PT681 - PT685 2

PT701 - PT703 2

PT716 - PT717 2

PT721 - PT725 2

PT801 - PT834 2

PT851 - PT854 2

PT871 - PT886 2

PT901 - PT930 2

PT971 - PT973 2

PT981 - PT985 2

PT996 2

PU001 - PU025 2

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BOEING SERVICE BULLETIN 737-28A1210
Variable Number Group

PU301 2

PU311 - PU313 2

PV001 - PV055 2

PV201 - PV209 2

PV226 - PV229 2

PV231 - PV237 2

PV271 - PV272 2

PV281 - PV287 2

PV296 2

PV301 - PV302 2

PV351 2

PV356 - PV357 2

PW001 - PW054 2

PW061 - PW068 2

PW072 2

PW086 - PW088 2

PW091 - PW094 2

PW101 - PW102 2

PW106 2

PW111 - PW120 2

PW156 - PW157 2

PW161 - PW171 2

PW201 - PW252 2

PW261 - PW268 2

PW271 - PW276 2

PW278 2

PW281 - PW293 2

PW296 2

PW301 - PW327 2

PW401 - PW408 2

PW411 - PW418 2

PW421 - PW424 2

PW431 - PW435 2

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BOEING SERVICE BULLETIN 737-28A1210
Variable Number Group

PW441 - PW450 2

PW461 - PW467 2

PW501 - PW504 2

PW511 - PW522 2

PW524 - PW550 2

PW556 - PW557 2

PW561 - PW564 2

PW571 - PW576 2

PW591 - PW596 2

PW611 - PW622 2

PW631 - PW637 2

PW661 - PW662 2

PW681 - PW683 2

PW701 - PW702 2

PW711 - PW717 2

PW741 - PW742 2

PW761 2

PW771 2

PW831 2

PW851 - PW856 2

PX071 1

PX701 1

PY001 - PY008 1

PY021 1

PY022 2

PY031 1

PY036 - PY037 2

PY046 - PY048 2

PY051 - PY053 2

PY056 - PY057 2

PY101 - PY103 2

PY111 - PY113 2

PY131 - PY135 2

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Variable Number Group

PY141 - PY143 2

PY151 - PY154 2

PY156 - PY157 2

PY161 - PY162 2

PY166 2

PY191 2

PY201 2

PY221 - PY222 2

PY231 2

PY241 - PY244 2

PY270 - PY275 2

PY281 2

PY286 2

PY301 - PY304 1

PY321 - PY323 1

PY341 - PY346 1

PY361 - PY362 1

PY381 1

PY401 2

PY409 - PY411 2

PY421 - PY422 2

PY441 2

PY451 2

PY461 - PY463 2

PY591 - PY595 2

PY611 - PY612 2

PY621 2

PY631 2

PY651 2

PY671 - PY672 2

PY721 2

PY741 2

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BOEING SERVICE BULLETIN 737-28A1210
2. Spares Affected

None.

B. Concurrent Requirements

Group 1:

Operators with Group 1 airplanes should contact Boeing to get engineering and accomplishment

instructions for this change and do the instructions.

Group 2:

Company Service Bulletin Description

Gives instructions to install a printed circuit

assembly in the P5-2 fuel system module

assembly for fuel system master caution

warning.

69-37335-28-04, Revision 2, dated Feb

10/2010 (a)

BAE Systems

(a) If operators choose to rework the existing P5-2 Fuel System Module, do this service bulletin before or at

the same time.

C. Reason

This service bulletin is the result of fuel system safety analysis done by Boeing under Special Federal

Aviation Regulation (SFAR) 88, Fuel Tank System Fault Tolerance Evaluation Requirements. Results

from the fuel system safety analysis show that fuel boost pumps that run dry could cause an overheat

condition external to the fuel boost pump explosion resistance area, that is open to the fuel boost pump

inlet. An overheat condition in this area could possibly cause an unwanted ignition source for the fuel

vapors in the fuel tank and could cause a fire or explosion.

This service bulletin gives instructions to replace the P5-2 Fuel System Module installed in the flight

deck with a changed P5-2 Fuel System Module. The changed P5-2 Fuel System Module has new

Master Caution logic that gives the necessary indication to the flight crew so that the fuel boost pumps

can be turned off and not operate dry.

The new P5-2 Fuel System Module lets the Master Caution light come on when only one center or

auxiliary tank fuel boost pump low pressure light is on for 10 seconds. Before this change, the Master

Caution light came on when both center tank fuel boost pumps or both auxiliary tank fuel boost pumps

had low pressure. All of the equipment and wiring changes to the Master Caution System are internal

to the P5-2 Fuel System Module.

Boeing Fleet Team Digest (FTD) 737 FTD 28-04003 is related to this service bulletin.

Federal Aviation Administration (FAA) Airworthiness Directive AD 2001-08-24 is related to this service

bulletin, but does not mandate the change.

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BOEING SERVICE BULLETIN 737-28A1210
Revision 1 puts airplanes from Groups 3 thru 28 together into Group 2, of the service bulletin effectivity,

to resolve interchangeability problems. Airplanes line numbers 1 thru 291 stay in Group 1 and are not

affected by this revision. Groups in the original issue were based on the P5-2 Fuel System Module

dash number, delivered on each airplane. But new P5-2 Fuel System Module dash numbers were

created, after the airplanes were delivered, that are interchangeable with older P5-2 Fuel System

Modules. As a result, some operators, that installed P5-2 Fuel System Module part numbers

interchangeable with the ones delivered on their airplane, may not be able to accomplish the original

issue. Reference to Federal Aviation Administration (FAA) Airworthiness Directive AD 2001-08-24 and

Boeing Fleet Team Digest (FTD) 737 FTD 28-04003 are also added.

The data given in Information Notice 737-28A1210 IN 01 and 737-28A1210 IN 02 is included in this

revision.

D. Description

Group 1:

Operators with Group 1 airplanes should contact Boeing to get engineering and accomplishment

instructions for this change and do the instructions.

Group 2:

In the flight compartment, at the P5 overhead panel, remove the P5-2 Fuel System Module. Install a

changed, or new P5-2 Fuel System Module. Do a test to make sure that the P5-2 Fuel System Module

operates correctly.

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

Group 1:

Affected Maintenance Zones

Model Zone

737-100, 737-200, 737-200C 1-1

Group 2:

Affected Maintenance Zones

Model Zone

737-200, 737-200C 1-1

Group 2:

Affected Maintenance Zones

Model Zone

737-300, 737-400, 737-500 101

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BOEING SERVICE BULLETIN 737-28A1210
E. Compliance

The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to

this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this

service bulletin mandatory.

Boeing recommends that the change given in this service bulletin be done within 36 months after the

original issue date of this service bulletin.

Group 1:

Operators with Group 1 airplanes should contact Boeing to get engineering and accomplishment

instructions for this change and do the instructions.

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 for all EASA/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.

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.

G. Manpower

The table below shows an estimate of the man-hours necessary to do this service bulletin for each

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

operator man-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 inspect the work

— Time to find the tools.

Group 1:

Operators with Group 1 airplanes should contact Boeing to get engineering and accomplishment

instructions for this change and do the instructions.

Group 2:

Elapsed Time

(Hours)

Number of Task-Hours

Persons

Task

FIGURE 1 1 0.50 0.50

Do Functional Test 1 0.50 0.50

TOTAL FOR EACH AIRPLANE 1.0 1.0

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BOEING SERVICE BULLETIN 737-28A1210
H. Weight and Balance Changes

None.

I. Electrical Load Data

Not applicable.

J. References

1. Existing Data:

a. Engineering Change Memo PRR 35440-20R.

b. Federal Aviation Administration (FAA) Airworthiness Directive (AD) 2001-08-24.

c. Service Bulletin Index D6-19567

d. 737 Fleet Team Digest (FTD) 28-04003.

e. 737-100/200 Aircraft Maintenance Manual (AMM) 24-22-0, 28-22-122, 28-42-0.

f. 737-300/400/500 Aircraft Maintenance Manual (AMM) 24-22-00, 28-22-43, 28-42-00.

g. Special Federal Aviation Regulation (SFAR) 88.

h. BAE Systems Component Service Bulletin 69-37335-28-04.

2. Data supplied with this Service Bulletin:

None.

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

Drawing Number Title

MODULE INSTALLATION-OVERHEAD,

ELECTRONICS, AND AUXILIARY

65-46991

MODULE INSTALLATION-OVERHEAD,

ELECTRONICS, AND AUXILIARY

65C46991

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.

K. Publications Affected

1. Publications:

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BOEING SERVICE BULLETIN 737-28A1210
Publication Chapter-Section

737-100/200/300/400/500 FAA Approved (a)

Airplane Flight Manual

11-30, 28-11, 28-41, 28-42,

31-11, and 73-00

737-100/200/300/400/500 Illustrated Parts

Catalog

737-100/200/300/400/500 Aircraft Mainte- 28-22

nance Manual

Chapter 12, Normal Procedures (NP), Non-Normal

Checklist (NNC)

737-100/200/300/400/500 Flight Crew Operations Manual

(a) This Change affects Section 1 and 3 of the FAA Approved Airplane Flight

Manual. Operators will receive applicable data.

2. Damage Tolerance Based Structural Inspections:

Boeing has evaluated 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

Refer to Paragraph 2.C., Parts Necessary for Each Airplane, for interchangeability and intermixability

information.

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BLANK PAGE
2. MATERIAL INFORMATION

A. Material - Price and Availability

The operator can supply the parts and materials shown in Paragraph 2.C., Parts Necessary for Each

Airplane and Paragraph 2.D., Parts Necessary to Change Spares. Refer to BAE Systems Component

Service Bulletin 69-37335-28-04.

B. Industry Support Information

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

C. Parts Necessary For Each Airplane

1. Kits/Parts:

None.

2. Parts and Materials Supplied by the Operator:

Group 1:

Operators with Group 1 airplanes should contact Boeing to get engineering and accomplishment

instructions for this change and do the instructions.

Group 2:

Existing Part Notes

Number

Part Number / QTY Name

Specification

69-37335-2031 1 P5-2 Fuel System Module Assembly 69-37335-31 (a) (b)

69-37335-2032 1 P5-2 Fuel System Module Assembly 69-37335-32 (a) (b)

69-37335-2039 1 P5-2 Fuel System Module Assembly 69-37335-39 (a) (b)

69-37335-2043 1 P5-2 Fuel System Module Assembly 69-37335-43 (a) (b)

69-37335-2045 1 P5-2 Fuel System Module Assembly 69-37335-45 (a) (b)

69-37335-2051 1 P5-2 Fuel System Module Assembly 69-37335-51 (a) (b)

69-37335-2058 1 P5-2 Fuel System Module Assembly 69-37335-58 (a) (b) (c)

69-37335-2066 1 P5-2 Fuel System Module Assembly 69-37335-66 (a) (b)

69-37335-2067 1 P5-2 Fuel System Module Assembly 69-37335-67 (a) (b)

69-37335-2068 1 P5-2 Fuel System Module Assembly 69-37335-68 (a) (b)

69-37335-2071 1 P5-2 Fuel System Module Assembly 69-37335-71 (a) (b) (c)

69-37335-2072 1 P5-2 Fuel System Module Assembly 69-37335-72 (a) (b) (c)

69-37335-2079 1 P5-2 Fuel System Module Assembly 69-37335-79 (a) (b) (c)

69-37335-2087 1 P5-2 Fuel System Module Assembly 69-37335-87 (a) (b) (c)

69-37335-2088 1 P5-2 Fuel System Module Assembly 69-37335-88 (a) (b)

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BOEING SERVICE BULLETIN 737-28A1210
Group 2:

Existing Part Notes

Number

Part Number / QTY Name

Specification

69-37335-2093 1 P5-2 Fuel System Module Assembly 69-37335-93 (a) (b)

69-37335-2095 1 P5-2 Fuel System Module Assembly 69-37335-95 (a) (b)

69-37335-2096 1 P5-2 Fuel System Module Assembly 69-37335-96 (a) (b)

69-37335-2098 1 P5-2 Fuel System Module Assembly 69-37335-98 (a) (b) (c)

69-37335-2100 1 P5-2 Fuel System Module Assembly 69-37335-100 (a) (b) (c)

69-37335-2105 1 P5-2 Fuel System Module Assembly 69-37335-105 (a) (b) (c)

69-37335-2111 1 P5-2 Fuel System Module Assembly 69-37335-111 (a) (b)

69-37335-2112 1 P5-2 Fuel System Module Assembly 69-37335-112 (a) (b)

69-37335-2115 1 P5-2 Fuel System Module Assembly 69-37335-115 (a) (b)

69-37335-2117 1 P5-2 Fuel System Module Assembly 69-37335-117 (a) (b)

69-37335-2118 1 P5-2 Fuel System Module Assembly 69-37335-118 (a) (b) (c)

69-37335-2119 1 P5-2 Fuel System Module Assembly 69-37335-119 (a) (b) (c)

69-37335-2123 1 P5-2 Fuel System Module Assembly 69-37335-123 (a) (b)

69-37335-2124 1 P5-2 Fuel System Module Assembly 69-37335-124 (a) (b)

69-37335-2125 1 P5-2 Fuel System Module Assembly 69-37335-125 (a) (b)

69-37335-2126 1 P5-2 Fuel System Module Assembly 69-37335-126 (a) (b)

69-37335-2127 1 P5-2 Fuel System Module Assembly 69-37335-127 (a) (b)

69-37335-2128 1 P5-2 Fuel System Module Assembly 69-37335-128 (a) (b) (c)

69-37335-2129 1 P5-2 Fuel System Module Assembly 69-37335-129 (a) (b)

69-37335-2130 1 P5-2 Fuel System Module Assembly 69-37335-130 (a) (b)

69-37335-2131 1 P5-2 Fuel System Module Assembly 69-37335-131 (a) (b) (c)

69-37335-2132 1 P5-2 Fuel System Module Assembly 69-37335-132 (a) (b)

69-37335-2133 1 P5-2 Fuel System Module Assembly 69-37335-133 (a) (b)

69-37335-2134 1 P5-2 Fuel System Module Assembly 69-37335-134 (a) (b)

69-37335-2135 1 P5-2 Fuel System Module Assembly 69-37335-135 (a) (b)

69-37335-2136 1 P5-2 Fuel System Module Assembly 69-37335-136 (a) (b)

69-37335-2137 1 P5-2 Fuel System Module Assembly 69-37335-137 (a) (b)

69-37335-2138 1 P5-2 Fuel System Module Assembly 69-37335-138 (a) (b) (c)

69-37335-2139 1 P5-2 Fuel System Module Assembly 69-37335-139 (a) (b)

69-37335-2140 1 P5-2 Fuel System Module Assembly 69-37335-140 (a) (b) (c)

69-37335-2143 1 P5-2 Fuel System Module Assembly 69-37335-143 (a) (b)

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Group 2:

Existing Part Notes

Number

Part Number / QTY Name

Specification

(a) Refer to BAE Systems Component Service Bulletin 69-37335-28-04, Revision 2, dated Feb

10/2010 for more data about changes to P5-2 Fuel System Module.

(b) This part is not used in production.

(c) This part is for airplanes with an auxiliary fuel tank.

3. Parts Modified and Reidentified:

Group 1:

Operators with Group 1 airplanes should contact Boeing to get engineering and accomplishment

instructions for this change and do the instructions.

Group 2:

Existing Part QTY Name New Part Number Notes

Number

P5-2 Fuel System Mod- 69-37335-( ) (a) (b)

ule Assembly

69-37335-( ) 1

(a) Make the change in accordance with BAE Systems Component Service Bulletin 69-37335-

28-04, Revision 2, dated Feb 10/2010.

(b) Refer to BAE Systems Component Service Bulletin 69-37335-28-04, Revision 2, dated Feb

10/2010 for the part number to use after the change has been done.

4. Parts Removed and Not Replaced:

None.

D. Parts Necessary to Change Spares

Group 1:

Operators with Group 1 airplanes should contact Boeing to get engineering and accomplishment

instructions for this change and do the instructions.

Group 2:

Refer to BAE Systems Component Service Bulletin 69-37335-28-04, Revision 2, dated Feb 10/2010.

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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BOEING SERVICE BULLETIN 737-28A1210

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. Use the approved fastener and process material substitutions in accordance with

737 SRM, Chapter 51.

4. These work instructions refer to procedures included in other Boeing documents.

When the words "refer to" are used and the operator has an accepted alternative

procedure, the accepted alternative procedure can be used. When the words "in

accordance with" are included in the instruction, the procedure in the Boeing document

must be used.

5. The instructions in Paragraph 3.B., Work Instructions and the figures can include

operation of tools or test equipment. Boeing Engineering Tool Drawings, the Illustrated

Tool and Equipment Manual, and the Special Tool and Ground Handling Drawing

Index contain data on versions of the tools or test equipment that you can use. It is

permitted to use replaced tools. It is not permitted to use superseded tools.

6. This service bulletin includes functional test procedures for the systems changed by

this service bulletin. More functional tests can possibly be necessary in accordance

with standard maintenance practices because of interruption to other airplane systems.

7. Refer to BAE Systems Component Service Bulletin 69-37335-28-04 Revision 2 dated

Feb 10/2010, for the component part number changes of the P5-2 Fuel System

Module. BAE Systems Component Service Bulletin 69-37335-28-04, Revision 2,

dated Feb 10/2010, gives the procedures to change the equipment and wire

connections in the P5-2 Fuel System Modules.

B. WORK INSTRUCTIONS

Group 1:

Operators with Group 1 airplanes should contact Boeing to get engineering and accomplishment

instructions for this change and do the instructions.

Group 2:

1. Remove electrical power from the airplane. Refer to 737-100/200 AMM 24-22-0 or 737-300/400/500

AMM 24-22-00 as an accepted procedure.

2. In the flight compartment, at the P5 forward overhead panel, replace the P5-2 Fuel System Module

in accordance with FIGURE 1.

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BOEING SERVICE BULLETIN 737-28A1210
NOTE: Operators can choose to install a new P5-2 Fuel System Module as a replacement, or

do the work in accordance with BAE Systems Component Service Bulletin 69-37335-28-04,

Revision 2, dated Feb 10/2010 to change the removed P5-2 Fuel System Module. Refer

to Paragraph 2.C.2., Parts and Materials Supplied by the Operator for replacement part

numbers for the existing P5-2 Fuel System Module.

3. Supply electrical power to the airplane. Refer to 737-100/200 AMM 24-22-0 or 737-300/400/500

AMM 24-22-00 as an accepted procedure.

4. Do the Master Caution Timing Test and Operational Test of the Fuel System Module. Refer to

737-100/200 AMM 28-22-122 or 737-300/400/500 AMM 28-22-43 as an accepted procedure.

5. Do the Fuel Feed Low Pressure Indicating Test. Refer to 737-100/200 AMM 28-42-0 or

737-300/400/500 AMM 28-42-00 as an accepted procedure.

6. Remove electrical power from the airplane. Refer to 737-100/200 AMM 24-22-0 or 737-300/400/500

AMM 24-22-00 as an accepted procedure.

7. Put the airplane back to a serviceable condition.

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BOEING SERVICE BULLETIN 737-28A1210
This Figure applies only to: Group 2.

FIGURE 1: MASTER CAUTION SYSTEM - P5-2 FUEL SYSTEM MODULE - REPLACEMENT

(SHEET 1 OF 2)

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BOEING SERVICE BULLETIN 737-28A1210
The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY

numbers shown below are the numbers of parts necessary for one airplane.

STEP TASK NAME IDENTIFICATION QTY MORE DATA

From the P5 forward

overhead panel. (a)

P5-2 Fuel System 69-37335-( ) 1

Module

1 Remove / Keep

In the P5 forward

overhead panel. (a)

(c)

P5-2 Fuel System 69-37335-( ) 1

Module

2 Install (Changed)

In the P5 forward

overhead panel. (a)

(b)

P5-2 Fuel System 69-37335-( ) 1

Module

Install (New)

(a) Refer to 737-100/200 AMM 28-22-122 or 737-300/400/500 AMM 28-22-43 as an accepted procedure.

(b) For the new P5-2 Fuel System Module part number(s) that can replace the existing P5-2 Fuel System

Module (as applicable), refer to Paragraph 2.C.2., Parts and Materials Supplied by the Operator.

(c) The P5-2 Fuel System Module can be changed in accordance with BAE Systems Component Service

Bulletin 69-37335-28-04, Revision 2, dated Feb 10/2010. Operators can also install a changed P5-2 Fuel

System Module.

FIGURE 1: MASTER CAUTION SYSTEM - P5-2 FUEL SYSTEM MODULE - REPLACEMENT

(SHEET 2 OF 2)

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BOEING SERVICE BULLETIN 737-28A1210