### 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 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.9E991 ECCN: 

## BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 1 of 36 3.0BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 2 of 36 **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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 3 of 36 **BOEING SERVICE BULLETIN 737-28A1210**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 4 of 36 **BOEING SERVICE BULLETIN 737-28A1210**

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### 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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 5 of 368. 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** August 02, 2010 Original Issue: Revision 1:

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 6 of 36 **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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 7 of 36**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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 8 of 36 **BOEING SERVICE BULLETIN 737-28A1210**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 9 of 36 **BOEING SERVICE BULLETIN 737-28A1210**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 10 of 36 **BOEING SERVICE BULLETIN 737-28A1210**

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### 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.
**DESCRIPTION CONFIGURATION**  **GROUP** 737-100/200/200C airplanes, line numbers 1 thru 291.

- 1 737-200/200C/300/400/500 airplanes, line numbers 292 thru 3132.

- 2

Airplane Models: 737-100, 737-200, 737-200C, 737-300, 737-400, 737-500 **Group Variable Number** 1 PA001 - PA022 1 PA099 1 PA231 - PA232 1 PC001 - PC005 1 PG001 - PG075 1 PG199 1 PG201 - PG230 1 PG251 - PG255 1 PG271 - PG279

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 11 of 36**Group Variable Number** 1 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 2 PG584 - PG586 1 PG621 - PG630 1 PG651 - PG652 1 PG701 - PG705 2 PH001 2 PH011 - PH013 2 PH021 - PH024 1 PH701 - PH715 1 PH731 - PH732 1 PH741 - PH742 2 PH743 1 PJ001 - PJ002 2 PJ003 - PJ009 1 PJ031 - PJ032 1 PJ071 - PJ072 1 PJ101 - PJ104 2 PJ105 - PJ119 2 PJ201 - PJ219 2 PJ301 - PJ302 2 PJ551 - PJ561 2 PJ601 - PJ615 2 PJ811 2 PJ816 - PJ817 2 PK026 - PK029

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 12 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Group**  **Variable Number**2 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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 13 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Group**  **Variable Number**2 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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 14 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Group**  **Variable Number**2 PL631 - PL632 1 PL711 - PL712 1 PL716 2 PL717 - PL747 2 PL756 2 PL758 2 PL761 - PL770 2 PL781 - PL788 2 PL793 1 PL801 - PL803 2 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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 15 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Group**  **Variable Number**2 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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 16 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Group**  **Variable Number**2 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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 17 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Group**  **Variable Number**2 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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 18 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Group**  **Variable Number**2 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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 19 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Group**  **Variable Number**2 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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 20 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Group**  **Variable Number**2 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 1 PX071 1 PX701 1 PY001 - PY008 1 PY021 2 PY022 1 PY031 2 PY036 - PY037 2 PY046 - PY048 2 PY051 - PY053 2 PY056 - PY057 2 PY101 - PY103 2 PY111 - PY113 2 PY131 - PY135

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 21 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Group**  **Variable Number**2 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 1 PY301 - PY304 1 PY321 - PY323 1 PY341 - PY346 1 PY361 - PY362 1 PY381 2 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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 22 of 36 **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: Description**  **Service Bulletin Company**  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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 23 of 36 **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 Zone**  **Model** 1-1 737-100, 737-200, 737-200C **Group 2:**
**Affected Maintenance Zones Zone**  **Model** 1-1 737-200, 737-200C **Group 2:**
**Affected Maintenance Zones Zone**  **Model** 101 737-300, 737-400, 737-500

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 24 of 36 **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) Task-Hours**  **Number of Persons**  **Task**

0.50 0.50 1 FIGURE 1 0.50 0.50 1 Do Functional Test 1.0 1.0 TOTAL FOR EACH AIRPLANE

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 25 of 36 **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:
**Title Drawing Number** 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:

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 26 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Chapter-Section**  **Publication** (a) 737-100/200/300/400/500 FAA Approved 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 28-22 737-100/200/300/400/500 Aircraft Mainte- 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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 27 of 36 **BOEING SERVICE BULLETIN 737-28A1210**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 28 of 36 **BOEING SERVICE BULLETIN 737-28A1210**

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:**
**Notes Existing Part**  **Number Name**  **QTY Part Number /**  **Specification** (a) (b) 69-37335-31 P5-2 Fuel System Module Assembly 1 69-37335-2031 (a) (b) 69-37335-32 P5-2 Fuel System Module Assembly 1 69-37335-2032 (a) (b) 69-37335-39 P5-2 Fuel System Module Assembly 1 69-37335-2039 (a) (b) 69-37335-43 P5-2 Fuel System Module Assembly 1 69-37335-2043 (a) (b) 69-37335-45 P5-2 Fuel System Module Assembly 1 69-37335-2045 (a) (b) 69-37335-51 P5-2 Fuel System Module Assembly 1 69-37335-2051 (a) (b) (c) 69-37335-58 P5-2 Fuel System Module Assembly 1 69-37335-2058 (a) (b) 69-37335-66 P5-2 Fuel System Module Assembly 1 69-37335-2066 (a) (b) 69-37335-67 P5-2 Fuel System Module Assembly 1 69-37335-2067 (a) (b) 69-37335-68 P5-2 Fuel System Module Assembly 1 69-37335-2068 (a) (b) (c) 69-37335-71 P5-2 Fuel System Module Assembly 1 69-37335-2071 (a) (b) (c) 69-37335-72 P5-2 Fuel System Module Assembly 1 69-37335-2072 (a) (b) (c) 69-37335-79 P5-2 Fuel System Module Assembly 1 69-37335-2079 (a) (b) (c) 69-37335-87 P5-2 Fuel System Module Assembly 1 69-37335-2087 (a) (b) 69-37335-88 P5-2 Fuel System Module Assembly 1 69-37335-2088

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 29 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Group 2:** 
**Notes Existing Part**  **Number Name**  **QTY Part Number /**  **Specification** (a) (b) 69-37335-93 P5-2 Fuel System Module Assembly 1 69-37335-2093 (a) (b) 69-37335-95 P5-2 Fuel System Module Assembly 1 69-37335-2095 (a) (b) 69-37335-96 P5-2 Fuel System Module Assembly 1 69-37335-2096 (a) (b) (c) 69-37335-98 P5-2 Fuel System Module Assembly 1 69-37335-2098 (a) (b) (c) 69-37335-100 P5-2 Fuel System Module Assembly 1 69-37335-2100 (a) (b) (c) 69-37335-105 P5-2 Fuel System Module Assembly 1 69-37335-2105 (a) (b) 69-37335-111 P5-2 Fuel System Module Assembly 1 69-37335-2111 (a) (b) 69-37335-112 P5-2 Fuel System Module Assembly 1 69-37335-2112 (a) (b) 69-37335-115 P5-2 Fuel System Module Assembly 1 69-37335-2115 (a) (b) 69-37335-117 P5-2 Fuel System Module Assembly 1 69-37335-2117 (a) (b) (c) 69-37335-118 P5-2 Fuel System Module Assembly 1 69-37335-2118 (a) (b) (c) 69-37335-119 P5-2 Fuel System Module Assembly 1 69-37335-2119 (a) (b) 69-37335-123 P5-2 Fuel System Module Assembly 1 69-37335-2123 (a) (b) 69-37335-124 P5-2 Fuel System Module Assembly 1 69-37335-2124 (a) (b) 69-37335-125 P5-2 Fuel System Module Assembly 1 69-37335-2125 (a) (b) 69-37335-126 P5-2 Fuel System Module Assembly 1 69-37335-2126 (a) (b) 69-37335-127 P5-2 Fuel System Module Assembly 1 69-37335-2127 (a) (b) (c) 69-37335-128 P5-2 Fuel System Module Assembly 1 69-37335-2128 (a) (b) 69-37335-129 P5-2 Fuel System Module Assembly 1 69-37335-2129 (a) (b) 69-37335-130 P5-2 Fuel System Module Assembly 1 69-37335-2130 (a) (b) (c) 69-37335-131 P5-2 Fuel System Module Assembly 1 69-37335-2131 (a) (b) 69-37335-132 P5-2 Fuel System Module Assembly 1 69-37335-2132 (a) (b) 69-37335-133 P5-2 Fuel System Module Assembly 1 69-37335-2133 (a) (b) 69-37335-134 P5-2 Fuel System Module Assembly 1 69-37335-2134 (a) (b) 69-37335-135 P5-2 Fuel System Module Assembly 1 69-37335-2135 (a) (b) 69-37335-136 P5-2 Fuel System Module Assembly 1 69-37335-2136 (a) (b) 69-37335-137 P5-2 Fuel System Module Assembly 1 69-37335-2137 (a) (b) (c) 69-37335-138 P5-2 Fuel System Module Assembly 1 69-37335-2138 (a) (b) 69-37335-139 P5-2 Fuel System Module Assembly 1 69-37335-2139 (a) (b) (c) 69-37335-140 P5-2 Fuel System Module Assembly 1 69-37335-2140 (a) (b) 69-37335-143 P5-2 Fuel System Module Assembly 1 69-37335-2143

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 30 of 36 **BOEING SERVICE BULLETIN 737-28A1210 Group 2:** 
**Notes Existing Part**  **Number Name**  **QTY Part Number /**  **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:**
**Notes New Part Number**  **Name QTY**  **Existing Part Number**  (a) (b) 69-37335-( ) P5-2 Fuel System Mod- ule Assembly 1 69-37335-( ) (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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 31 of 36 **BOEING SERVICE BULLETIN 737-28A1210**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 32 of 36 **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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 33 of 36 **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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1: May 13, 2011 34 of 36 **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)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1 May 13, 2011 35 of 36 **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.
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  From the P5 forward overhead panel. (a) 1 69-37335-( ) P5-2 Fuel System Module Remove / Keep 1

In the P5 forward overhead panel. (a) (c) 1 69-37335-( ) P5-2 Fuel System Module Install (Changed) 2

In the P5 forward overhead panel. (a) (b) 1 69-37335-( ) P5-2 Fuel System 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)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 02, 2010 737-28A1210 Revision 1 May 13, 2011 36 of 36 **BOEING SERVICE BULLETIN 737-28A1210**