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Commercial Airplanes 777 Service Bulletin Number: 777-28A0034 Original Issue: August 02, 2007 Revision 3: September 25, 2015 ATA System: 2822 2825 2826 2831 SUBJECT: FUEL - Main and Center Tank Valve Actuators - Inspection and Replacement Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 300-774). 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.

9E991ECCN:

BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET Copyright © 2007 Boeing.

Unpublished Work. All Rights Reserved.

Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company.

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, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and Boeing liveries 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.

Original Issue: August 02, 2007 777-28A0034Revision 3: September 25, 2015 1 of 213

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Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

Original Issue: August 02, 2007 777-28A0034Revision 3: September 25, 2015 2 of 213 BOEING SERVICE BULLETIN 777-28A0034

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Table of Contents

Revision Transmittal Sheet7

Summary11

1. PLANNING INFORMATION17

A. Effectivity17

1. Airplanes17

2. Spares Affected26

B. Concurrent Requirements26

C. Reason27

D. Description28

E. Compliance31

F. Approval32

G. Manpower32

H. Weight and Balance Changes54

I. Electrical Load Data54

J. References54

1. Existing Data:54

2. Data Supplied with this Service Bulletin:55

3. Installation Drawings Used in the Preparation of this Service Bulletin:55

K. Publications Affected55

L. Interchangeability and Intermixability of Parts55

M. Software Accomplishment Summary55

2. MATERIAL INFORMATION57

A. Material - Price and Availability57

B. Industry Support Information57

C. Parts Necessary for Each Airplane57

1. Kits/Parts:57

2. Parts and Materials Supplied by the Operator:57

3. Parts Modified and Reidentified:68

4. Parts Removed and Not Replaced:68

D. Parts Necessary to Change Spares69

E. Special Tooling - Price and Availability69

F. Special Tooling Necessary to do this Service Bulletin69

3. ACCOMPLISHMENT INSTRUCTIONS71

A. GENERAL INFORMATION71

B. WORK INSTRUCTIONS72

FIGURE 1: LEFT ENGINE FUEL SPAR MOTOR OPERATED VALVE ACTUATOR PART NUMBER -

INSPECTION [Group 1-3, 5-6, Configuration 2]103

FIGURE 2: MOTOR OPERATED VALVE ACTUATOR - INDEX PLATE - REMOVAL [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3, Configuration 1-2; Group 4, Configuration 1] . 105 FIGURE 3: MOTOR OPERATED VALVE ACTUATOR - INDEX PLATE - PREPARATION [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3, Configuration 1-2; Group 4, Configuration

1]107

FIGURE 4: MOTOR OPERATED VALVE ACTUATOR - ADAPTER PLATE ELECTRICAL BOND RESISTANCE - MEASUREMENT [Group 1, Configuration 1-2; Group 2, Configuration 1-2;

Group 3, Configuration 1-2; Group 4, Configuration 1]108

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FIGURE 5: MOTOR OPERATED VALVE ACTUATOR - ADAPTER PLATE SURFACE - PREPARATION [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3, Configuration 1-2; Group 4,

Configuration 1]109

FIGURE 6: MOTOR OPERATED VALVE ACTUATOR - INDEX PLATE - LOCATION [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3, Configuration 1-2; Group 4, Configuration 1] . 110 FIGURE 7: MOTOR OPERATED VALVE ACTUATOR, WITH INDEX PLATE - INSTALLATION [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3, Configuration 1-2; Group 4, Configuration

1]111

FIGURE 8: MOTOR OPERATED VALVE ACTUATOR - ADAPTER PLATE AND AIRPLANE SURFACE - CLEAN [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3, Configuration 1-2;

Group 4, Configuration 1]115

FIGURE 9: RIGHT ENGINE FUEL SPAR MOTOR OPERATED VALVE ACTUATOR PART NUMBER -

INSPECTION [Group 1-3, 5-6, Configuration 2]116

FIGURE 10: LEFT WING - FORWARD/AFT CROSSFEED MOTOR OPERATED VALVE ACTUATORS PART NUMBER - INSPECTION [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3,

Configuration 1-2; Group 4, Configuration 1; Group 5-6]118

FIGURE 11: LEFT WING - APU FUEL SHUTOFF MOTOR OPERATED VALVE ACTUATOR PART NUMBER

- INSPECTION [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3, Configuration

1-2; Group 4, Configuration 1; Group 5-6]120

FIGURE 12: LEFT WING - APU FUEL ISOLATION MOTOR OPERATED VALVE ACTUATOR PART NUMBER

- INSPECTION [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3, Configuration

1-2; Group 4, Configuration 1; Group 5-6]122

FIGURE 13: LEFT WING - APU FUEL ISOLATION MOTOR OPERATED VALVE ACTUATOR BRACKET - CHANGE [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3, Configuration 1-2;

Group 4, Configuration 1]124

FIGURE 14: RIGHT WING - DEFUELING MOTOR OPERATED VALVE ACTUATOR PART NUMBER - INSPECTION [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3, Configuration

1-2; Group 4, Configuration 1; Group 5-6]129

FIGURE 15: LEFT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR PART NUMBER - INSPECTION [Group 1, Configuration 1-2; Group 4, Configuration 1; Group 5] . 131 FIGURE 16: RIGHT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR PART NUMBER - INSPECTION [Group 1, Configuration 1-2; Group 4, Configuration 1; Group 5] . 132 FIGURE 17: LEFT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR PART NUMBER - INSPECTION [Group 2, Configuration 1-2; Group 3, Configuration 1-2; Group 6]

.133

FIGURE 18: RIGHT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR PART NUMBER - INSPECTION [Group 2, Configuration 1-2; Group 3, Configuration 1-2; Group 6]

.134

FIGURE 19: LEFT WING - FUEL JETTISON ISOLATION MOTOR OPERATED VALVE ACTUATOR PART NUMBER - INSPECTION [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3,

Configuration 1-2; Group 4, Configuration 1; Group 5-6]135

FIGURE 20: RIGHT WING - FUEL JETTISON ISOLATION MOTOR OPERATED VALVE ACTUATOR PART NUMBER - INSPECTION [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3,

Configuration 1-2; Group 4, Configuration 1; Group 5-6]137

FIGURE 21: LEFT WING - APU FUEL SHUTOFF/ISOLATION MOTOR OPERATED VALVE ACTUATOR - INSTALLATION [Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3, Configuration

1-2; Group 4, Configuration 1]139

FIGURE 22: LEFT AND RIGHT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR

- INSTALLATION [Group 1, Configuration 1-2; Group 4, Configuration 1]143

FIGURE 23: LEFT ENGINE FUEL SPAR MOTOR OPERATED VALVE ACTUATOR BONDING JUMPER -

CAP SEAL [Group 1-3, Configuration 4]147

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FIGURE 24: RIGHT ENGINE FUEL SPAR MOTOR OPERATED VALVE ACTUATOR BONDING JUMPER

- CAP SEAL [Group 1-3, Configuration 4]149

FIGURE 25: LEFT WING - FORWARD/AFT CROSSFEED MOTOR OPERATED VALVE ACTUATORS BONDING JUMPER - CAP SEAL [Group 1, Configuration 3-4; Group 2, Configuration 3-4;

Group 3, Configuration 3-4; Group 4, Configuration 2]151

FIGURE 26: LEFT WING - APU FUEL SHUTOFF/ISOLATION MOTOR OPERATED VALVE ACTUATOR BONDING JUMPER - CAP SEAL [Group 1, Configuration 3-4; Group 2, Configuration 3-4;

Group 3, Configuration 3-4; Group 4, Configuration 2]153

FIGURE 27: RIGHT WING - DEFUELING MOTOR OPERATED VALVE ACTUATOR BONDING JUMPER - CAP SEAL [Group 1, Configuration 3-4; Group 2, Configuration 3-4; Group 3, Configuration

3-4; Group 4, Configuration 2]156

FIGURE 28: LEFT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR BONDING

JUMPER - CAP SEAL [Group 1, Configuration 3-4; Group 4, Configuration 2]158

FIGURE 29: RIGHT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR BONDING

JUMPER - CAP SEAL [Group 1, Configuration 3-4; Group 4, Configuration 2]160

FIGURE 30: LEFT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR BONDING

JUMPER - CAP SEAL [Group 2, Configuration 3-4; Group 3, Configuration 3-4]162

FIGURE 31: RIGHT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR BONDING

JUMPER - CAP SEAL [Group 2, Configuration 3-4; Group 3, Configuration 3-4]164

FIGURE 32: LEFT WING - FUEL JETTISON ISOLATION MOTOR OPERATED VALVE ACTUATOR BONDING JUMPER - CAP SEAL [Group 1, Configuration 3-4; Group 2, Configuration 3-4; Group 3,

Configuration 3-4; Group 4, Configuration 2]165

FIGURE 33: RIGHT WING - FUEL JETTISON ISOLATION MOTOR OPERATED VALVE ACTUATOR BONDING JUMPER - CAP SEAL [Group 1, Configuration 3-4; Group 2, Configuration 3-4;

Group 3, Configuration 3-4; Group 4, Configuration 2]167

FIGURE 34: LEFT WING - W8473 WIRE BUNDLE ROUTING - CHANGE [Group 1, Configuration 3-6; Group

2, Configuration 3-6; Group 3, Configuration 3-6; Group 4, Configuration 2-3]169

FIGURE 35: LEFT ENGINE - FUEL SPAR MOTOR OPERATED VALVE ACTUATOR REPLACEMENT [Group 1, Configuration 3, 5; Group 2, Configuration 3, 5; Group 3, Configuration 3, 5; Group

4, Configuration 2-3; Group 5-6, Configuration 1]172

FIGURE 36: MOTOR OPERATED VALVE ACTUATOR WITH INDEX PLATE INSTALLATION [Group 1-4,

Configuration 1]174

FIGURE 37: RIGHT ENGINE - FUEL SPAR MOTOR OPERATED VALVE ACTUATOR REPLACEMENT [Group 1, Configuration 3, 5; Group 2, Configuration 3, 5; Group 3, Configuration 3, 5; Group

4, Configuration 2-3; Group 5-6, Configuration 1]178

FIGURE 38: LEFT ENGINE - FUEL SPAR MOTOR OPERATED VALVE ACTUATOR REPLACEMENT

[Group 5-6, Configuration 2]180

FIGURE 39: RIGHT ENGINE - FUEL SPAR MOTOR OPERATED VALVE ACTUATOR REPLACEMENT

[Group 5-6, Configuration 2]182

FIGURE 40: LEFT WING - AFT CROSSFEED MOTOR OPERATED VALVE ACTUATOR REPLACEMENT

[Group 5-6]184

FIGURE 41: LEFT WING - FORWARD CROSSFEED MOTOR OPERATED VALVE ACTUATOR

REPLACEMENT [Group 5-6]187

FIGURE 42: LEFT WING - APU FUEL SHUTOFF MOTOR OPERATED VALVE ACTUATOR REPLACEMENT

[Group 5-6]190

FIGURE 43: LEFT WING - APU FUEL ISOLATION MOTOR OPERATED VALVE ACTUATOR REPLACEMENT

[Group 5-6]193

FIGURE 44: RIGHT WING - DEFUELING MOTOR OPERATED VALVE ACTUATOR REPLACEMENT

[Group 5-6]196

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FIGURE 45: LEFT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR

REPLACEMENT [Group 5]198

FIGURE 46: RIGHT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR

REPLACEMENT [Group 5]200

FIGURE 47: LEFT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR

REPLACEMENT [Group 6]202

FIGURE 48: RIGHT WING - FUEL JETTISON NOZZLE MOTOR OPERATED VALVE ACTUATOR

REPLACEMENT [Group 6]204

FIGURE 49: LEFT WING - FUEL JETTISON ISOLATION MOTOR OPERATED VALVE ACTUATOR

REPLACEMENT [Group 5-6]206

FIGURE 50: RIGHT WING - FUEL JETTISON ISOLATION MOTOR OPERATED VALVE ACTUATOR

REPLACEMENT [Group 5-6]209

APPENDIX A: SUMMARY OF SERVICE BULLETIN CHANGES RELATED TO MOV ACTUATOR PART

NUMBER AND AIMS SOFTWARE VERSION INSTALLED212

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Commercial Airplanes 777 Service Bulletin Revision Transmittal SheetNumber: 777-28A0034Original Issue: August 02, 2007 Revision 3: September 25, 2015 ATA System: 2822 2825 2826 2831 SUBJECT: FUEL - Main and Center Tank Valve Actuators - Inspection and Replacement This revision includes all pages of the service bulletin.

COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Airworthiness Directive AD 2013-05-03 is related to this service bulletin.

Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2013-NM-204-AD, is related to this service bulletin.

Airplane line numbers 555, 559, 561-563 and 566-567 are added to new Group 5 of this service bulletin effectivity.

Airplane line numbers 557-558, 560, 565 and 568 are added to new Group 6 of this service bulletin effectivity.

Airplane line numbers 552-554, 556, 564 and 569 and on are added to new Group 7 of this service bulletin effectivity.

NOTE: Airplane line numbers 504 and 519 have an AIMS 2 configuration and were incorrectly included in the Original Issue of this service bulletin, because they were delivered with MOV actuator P/N MA20A2027 installed (and not MA20A1001-1). These airplanes would have been added at this revision, if not included before, and are thus changed between groups of this service bulletin effectivity, to correctly define MOV actuator part interchangeability.

Effects of this Issue on airplanes on which the Original Issue, Revision 1, or Revision 2 was previously done:

See Paragraph 1.D., Description for more information.

REASON FOR REVISION This revision is sent to add a new Motor Operated Valve (MOV) actuator, part number MA30A1017, and a new APPENDIX A, to show the interchangeability with existing part numbers MA30A1001 and MA20A2027. The new MOV actuator is designed to divide the control and indication functions within the MOV actuator to remove a condition where a single defect within an MOV actuator could result in incorrect operation, without any report of the defect. This condition affects airplanes with both Airplane Information Management System (AIMS 1) and AIMS 2 systems. A software change will be made available in Boeing Service Bulletin 777-31-0227 for AIMS 2 airplanes, only. AIMS 2, V17 or later, will allow those airplanes to operate with specified MOV actuator part numbers installed at engine fuel spar locations. An MOV actuator change is necessary for AIMS 1 airplanes at the engine fuel spar locations, because an MOV actuator failure in this location could result in a failure to isolate fuel in the event of an engine fire, and no software solution is possible. As a result, at this revision, airplanes with AIMS 1 software that were in Group 1 are moved to new Group 4. In addition, airplanes that have MOV actuator P/N MA20A2027 installed that were in Group 2 are moved to new Group 3, for parts interchangeability.

This revision also adds new Groups 5 and 6, to inspect for unserviceable MOV actuators that could have been Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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accidentally installed on airplanes delivered with serviceable MOV actuators. Group 7 is added to define part interchangeability for the new MOV actuator, applicable to those airplanes. New configurations are added to Groups 1 thru 4, to identify previous incorporation of this service bulletin, and to all groups to show the possible AIMS hardware and software configurations related to the work in this service bulletin. This revision is also sent to adjust the routing of wire bundle W8473 to give clearance between the wire bundle and the Auxiliary Power Unit (APU) fuel isolation MOV actuator, to agree with the production configuration and to add reference to Federal Aviation Administration (FAA) Airworthiness Directive AD 2013-05-03 and Notice of Proposed Rule Making NPRM 2013-NM-204-AD.

Airplane line numbers 1 thru 422, 424 thru 428, and 430 thru 453, that have an AIMS 1 configuration, are moved from Group 1 to new Group 4 of this service bulletin effectivity.

Airplane line numbers 504 and 519 are moved from Group 2 to new Group 3 of this service bulletin effectivity.

Terminology has been changed in the Work Instructions to agree with the terminology defined in Paragraph

3.A., General Information - Notes.

These sections are changed:

1. Summary - Background: Updated and added related references.

2. Summary - Action: Updated to add more work and new groups and configurations.

3. Summary - Compliance: Added AD 2013-05-03 and NPRM 2013-NM-204-AD and updated statement.

4. Summary - Manpower: Updated.

5. Summary - Illustration: Added new Groups, Configurations and instructions.

6. Paragraph 1.A., Effectivity: Added new Groups and Configurations. Updated line number statement.

7. Paragraph 1.C., Reason: Updated and added related references.

8. Paragraph 1.D., Description: Updated to add more work and new airplane groups and configurations.

Added table for effects of this Issue on airplanes on which the original issue, Revision 1, or Revision 2 was previously done.

9. Paragraph 1.E., Compliance: Added AD 2013-05-03 and NPRM 2013-NM-204-AD and updated statement.

10. Paragraph 1.F., Approval: Added AMOC statement for AD 2013-05-03.

11. Paragraph 1.G., Manpower: Separated tables for Work Packages 1 thru 12 and added new tables for new Groups and Configurations, more work and Work Package 13.

12. Paragraph 1.H., Weight and Balance Changes: Changed table to show weight change for each MOV actuator as one item and added footnote.

13. Paragraph 1.J., References: Updated.

14. Paragraph 1.J.3., Installation Drawings Used in the Preparation of this Service Bulletin: Added standard paragraph.

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15. Paragraph 1.M., Software Accomplishment Summary: Added new statement.

16. Paragraph 2.C.2., Parts and Materials Supplied by the Operator: Updated tables and added new tables for new Groups and Configurations. Added optional MOV actuator part numbers MA20A2027 and MA30A1017.

17. Paragraph 2.C.3., Parts Modified and Reidentified: Added table new Groups and Configurations.

18. Paragraph 3.A., General Information: Updated General Notes.

19. Paragraph 3.B., Work Instructions: Updated existing work packages and MOV actuator part names - with note. Added lockwire task. Added new Groups and Configurations. Added new Work Package 13, and more work.

20. Paragraph 3.B., Work Instructions, Work Package 1 and 2: Added Step 2 and changed Step 3 to incorporate new configurations.

21. Paragraph 3.B., Work Instructions, Work Packages 3 thru 12: Added optional MOV actuator part numbers MA20A2027 and MA30A1017.

22. Figures 1 thru 22: Updated titles. Added new Groups and Configurations.

23. Figures 1, 2, 5, 6, 7 and 9 thru 22: Updated step tables.

24. Figures 1, 2 and 4 thru 20: Updated illustrations.

25. Figures 7, 21 and 22: Added optional MOV actuator part numbers MA20A2027 and MA30A1017.

26. Figures 21 and 22, step tables: Corrected Fay Bond instructions in Footnotes (b) and (g).

27. Figures 23 thru 50: Added for this revision.

28. APPENDIX A: Added for this revision.

The data given in Information Notice 777-28A0034 IN04 is included in this revision.

The data given in Alternative Method of Compliance Notice 777-28A0034-AMOC-01 is included in this revision.

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

Pages with no vertical lines have no changes.

REVISION HISTORY August 02, 2007Original Issue:

May 20, 2010Revision 1:

September 20, 2010Revision 2:

September 25, 2015Revision 3:

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Commercial Airplanes 777 Service Bulletin SummaryNumber: 777-28A0034Original Issue: August 02, 2007 Revision 3: September 25, 2015 ATA System: 2822 2825 2826 2831 SUBJECT: FUEL - Main and Center Tank Valve Actuators - Inspection and Replacement

CONCURRENT REQUIREMENTS None.

BACKGROUND Accomplishment of this service bulletin will prevent electrical current flow through Motor Operated Valve (MOV) actuators into the fuel tank. If this service bulletin is not done it is possible that a flow of electricity into the fuel tank could result in a potential source of ignition in a fuel tank and consequent fire or explosion.

The Boeing system safety assessment necessary for Special Federal Aviation Regulation (SFAR) 88, showed that under specific conditions it was possible for electrical current to flow through certain MOV actuators into the fuel tank. A new MOV actuator is available to replace the existing MOV actuator with this condition. The new MOV actuator includes an internal electrical isolator to give the MOV actuator protection against electrical energy from lightning, 115 VAC hot shorts, and 28 VDC internal shorts. The new MOV actuator will prevent the flow of an electrical current into the fuel tank and increase the reliability of the fuel system.

This service bulletin replaces the MOV actuator part number MA20A1001-1 with a new MOV actuator part number MA30A1001 or MA30A1017.

This service bulletin gives instruction on how to measure the electrical resistance of bonds at the installed MOV actuator locations, how to prepare a faying surface for the installation of the new MOV actuator, how to prepare affected airplane parts, and how to install the new MOV actuator.

After release of Revision 2 of this service bulletin, Boeing received reports of unserviceable MOV actuators part number MA30A1001. A condition was found where a single defect within an MOV actuator could result in incorrect operation, without any report of the defect. An MOV actuator with this defect, in the engine fuel spar MOV actuator location, could possibly not be able to isolate fuel from an engine fire. The new MOV actuators provided by Revision 3 of this service bulletin have been designed to divide the control and indication functions within the MOV actuator and thus remove this condition. Refer to APPENDIX A for a summary of service bulletin changes related to MOV actuator part number and AIMS version installed.

NOTE: ITT part numbers for the MOV actuator are used in this service bulletin, equivalent Boeing MOV actuator part numbers are given in APPENDIX A.

This service bulletin is the result of a safety assessment conducted by Boeing under SFAR 88, "Fuel Tank System Fault Tolerance Evaluation Requirements".

Boeing Service Bulletin 777-31-0227 is related to this service bulletin, for AIMS 2 airplanes only.

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Boeing Service Related Problem (SRP) 777-SRP-28-0141 is related to this service bulletin.

Boeing Fleet Team Digest (FTD) 777 FTD 28-12002, 777 FTD 28-11003 and 777 FTD 28-11001 are related to this service bulletin.

ACTION (PRR 61998-3, PRR 61777-233R) Group 1, Configuration 1-2; Group 2, Configuration 1-2; Group 3, Configuration 1-2; Group 4, Configuration 1:

MOTOR OPERATED VALVE ACTUATORS - INSPECTION AND REPLACEMENT

1. Get access to each MOV actuator.

2. Group 1-3, Configuration 2:

Inspect each MOV actuator part number. If the MOV actuator part number is MA20A1001-1, remove, discard, and replace with the MOV actuator part number MA30A1001, MA20A2027 or MA30A1017. If you are required to install the MOV actuator part number MA30A1001, MA20A2027 or MA30A1017, you must do an electrical resistance check of each location. If the measured resistance is not acceptable, you must rework the faying bond and the airplane parts. This may require rework of the index plate and the adapter plate. This may require a tank entry to rework the interface between the adapter plate and the airplane structure.

3. Group 1-4, Configuration 1:

Remove the left and right engine fuel spar MOV actuator and install a new MOV actuator, part number MA30A1017, at those locations. You must do an electrical resistance check of each location. If the measured resistance is not acceptable, you must rework the faying bond and the airplane parts. This may require rework of the index plate and the adapter plate. This may require a tank entry to rework the interface between the adapter plate and the airplane structure.

4. Group 1-4, Configuration 1:

Inspect each MOV actuator that is not installed at an engine fuel spar location for part number. If the MOV actuator part number is MA20A1001-1, remove, discard, and replace with the MOV actuator part number MA30A1001, MA20A2027 or MA30A1017. If you are required to install the MOV actuator part number MA30A1001, MA20A2027 or MA30A1017, you must do an electrical resistance check of each location. If the measured resistance is not acceptable, you must rework the faying bond and the airplane parts. This may require rework of the index plate and the adapter plate. This may require a tank entry to rework the interface between the adapter plate and the airplane structure.

5. Remove, change, and install the bracket at the Auxiliary Power Unit (APU) Isolation MOV actuator location to prevent part interference with the new MOV actuator part number MA30A1001 or MA30A1017.

Install a new spacer on changed bracket to improve clearance to wire bundle W8473.

6. Close access to each MOV actuator.

Group 1, Configuration 3-4; Group 2, Configuration 3-4; Group 3, Configuration 3-4; Group 4, Configuration 2:

MORE WORK: MOTOR OPERATED VALVE ACTUATOR BONDING JUMPER - CAP SEAL

1. Apply a cap seal to the fasteners of the MOV actuator bonding jumpers.

2. Remove the wire bundle clamp adjacent to the APU fuel isolation MOV actuator. Adjust wire bundle W8473 and install the clamp with a new spacer to give clearance between wire bundle W8473 and the APU fuel isolation MOV actuator.

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