## Alert Service Bulletin B787-81205-SB250054-00 EQUIPMENT AND **FURNISHINGS - Flight Compartment Seats - Captain and First Officer Seat Assembly Test and Replacement**  Issue 001, 19 Dec 2014 B787-81205-SB250054-00 **Publication:**

**BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET** Copyright © 2014 Boeing. Unpublished Work. All rights reserved. Treatment of this data module and its content is governed by contract with Boeing. Rights to use this data module are licensedon 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.
**EXPORT CONTROLLED** 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 controllerof this data has the individual responsibility to abide by all export laws. ECCN: 9E991
The applicability information below is referenced at the lower left of each page to indicate the page applicability. These references are valid for this print copy only. **PM Applicability (Publication Module applicability)** 787-8 Airplanes. Refer to Data Module SB B787-A-25-00-0054-00A-932A-D, Paragraph 1., Effectivity for the list of affected airplanes.

**B787-81205-SB250054-00 TITLE PAGE**  **Issue 001, 19 Dec 2014 Page 1 of 27**  EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. 6.0 **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB250054-00 **Table of Contents** Page Summary .....................................................5 PLANNING INFORMATION ..........................................9 1. Effectivity .............................................9 A. Airplanes ............................................9 B. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 8. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 9. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 10. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 A. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 B. Data Supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . 15 C. Installation Requirement Modules Used in the Preparation of this Service Bulletin: . . . 15 11. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 12. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . 15 13. Software Accomplishment Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 1. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3. Parts Necessary for Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 A. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 B. Parts and Materials Supplied by the Operator: . . . . . . . . . . . . . . . . . . . . . . . 17 C. Parts Modified and Reidentified: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 D. Parts Removed and Not Replaced: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . 18 ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 1. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Appendix A – CAPTAIN AND FIRST OFFICER SEAT ASSEMBLY TEST [Group 1:]. . . . . . . . . . . . 23

**B787-81205-SB250054-00 TABLE OF CONTENTS**  **Issue 001, 19 Dec 2014 Page 2 of 27**  EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB250054-00 **List of Illustrations**
THIS ALERT SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN DATA MODULE SB B787-A-25-00-0054-00A-932A-D, PARAGRAPH 1., **Alert:** EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER. 

## Description **Group 1:** Table 1 List of Illustrations - Alert Service Bulletin B787-81205-SB250054-00 **Used In ICN**  B787-A-25-00-0054-00A-931C-D Issue 001 ICN-B787-A-000061-A-81205-08859-A-01-1 B787-A-25-00-0054-0AA-931D-D Issue 001 ICN-B787-A-000061-A-81205-08860-A-01-1 B787-A-25-00-0054-0AA-931D-D Issue 001 ICN-B787-A-000061-A-81205-08861-A-01-1 B787-A-25-00-0054-0AA-931D-D Issue 001 ICN-B787-A-000061-A-81205-08862-A-01-1

**B787-A-25-00-0054-00A-00AA-D Applicable To:**  **Issue 001, 19 Dec 2014 End of data module**  Model 787 See Applicability of this data module **Page 3 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB250054-00 **List of Effective Data Modules**
THIS ALERT SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN DATA MODULE SB B787-A-25-00-0054-00A-932A-D, PARAGRAPH 1., **Alert:** EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER. 

## Description **Group 1:** Table 1 List of Effective Data Modules - Alert Service Bulletin B787-81205-SB250054-00 **Issue Date Issue Status**  **Issue Data Module – Information Name**  2014-12-19 New 001 B787-A-25-00-0054-00A-00AA-D – List of Illustrations 2014-12-19 New 001 B787-A-25-00-0054-00A-00SA-D – List of Effective Data Modules 2014-12-19 New 001 B787-A-25-00-0054-00A-931C-D – Summary 2014-12-19 New 001 B787-A-25-00-0054-00A-932A-D – PLANNING INFORMATION 2014-12-19 New 001 B787-A-25-00-0054-00A-934A-D – MATERIAL INFORMATION 2014-12-19 New 001 B787-A-25-00-0054-00A-933A-D – ACCOMPLISHMENT INSTRUCTIONS 2014-12-19 New 001 B787-A-25-00-0054-0AA-931D-D – Appendix A – CAPTAIN AND FIRST OFFICER SEAT ASSEMBLY TEST [Group 1:]

**B787-A-25-00-0054-00A-00SA-D Applicable To:**  **Issue 001, 19 Dec 2014 End of data module**  Model 787 See Applicability of this data module **Page 4 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB250054-00 **Summary**

THIS ALERT SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN DATA MODULE SB B787-A-25-00-0054-00A-932A-D, PARAGRAPH 1., **Alert:** EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.


## References **Title Reference**  Spares Affected SB B787-A-25-00-0054-00A-932A-D Issue 001, Paragraph 1.B. Compliance SB B787-A-25-00-0054-00A-932A-D Issue 001, Paragraph 5. Weight and Balance Changes SB B787-A-25-00-0054-00A-932A-D Issue 001, Paragraph 8. Electrical Load Data SB B787-A-25-00-0054-00A-932A-D Issue 001, Paragraph 9. Publications Affected SB B787-A-25-00-0054-00A-932A-D Issue 001, Paragraph 11. Kits/Parts SB B787-A-25-00-0054-00A-934A-D Issue 001, Paragraph 3.A. Parts and Materials Supplied by the Operator SB B787-A-25-00-0054-00A-934A-D Issue 001, Paragraph 3.B. Special Tooling Necessary to do this Service Bulletin SB B787-A-25-00-0054-00A-934A-D Issue 001, Paragraph 6. Effectivity SB B787-A-25-00-0054-00A-932A-D Issue 001, Paragraph 1. Manpower SB B787-A-25-00-0054-00A-932A-D Issue 001, Paragraph 7. Material - Price and Availability SB B787-A-25-00-0054-00A-934A-D Issue 001, Paragraph 1.

**B787-A-25-00-0054-00A-931C-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 5 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**

## Description **Group 1: 1. CONCURRENT REQUIREMENTS**  None. **2. BACKGROUND** This service bulletin gives instructions to replace the Captain and First Officer seat assembly and do a test of the Captain and First Officer seat assembly as an interim action to prevent seat actuator clutch failure resulting in loss of seat locking and un-commanded motion. If this service bulletin is not incorporated, the Captain and First Officer seats may move un-commanded during operation which could lead to reduced controllability of the airplane. An operator reported that a Captain's seat moved un-commanded during landing rollout due to a failure in the seat horizontal actuator. Investigation found press fit clutch pins in the actuator could migrate loose when subjected to repeated dynamic impact loading from clutch re-engagement when the manual horizontal control lever is released with the seat still moving on the tracks. The clutch pins can migrate loose, overturn, and force clutch plate separation, resulting in degraded or failed seat locking. The new Captain and First Officer seat assemblies installed by this service bulletin include new horizontal and vertical actuators which incorporate design changes to the clutch mechanism to improve pin retention and prevent loss of locking due to pin migration. This service bulletin also includes instructions to perform interim tests of Captain and First Officer seat actuator clutch operation to prevent loss of seat locking and un-commanded motion prior to installation of new Captain and First Officer seat assemblies incorporating the new actuators. Boeing Service Related Problem (SRP) 787 SRP-25-0332 is related to this service bulletin.This table is provided to operators for planning purposes only. Refer to the applicable sections for more information. Table 1 **Data Module Reference Affected**  **Planning Data** Data Module SB B787-A-25-00-0054-00A-932AD, Paragraph 1.B., Spares Affected No Spares Affected

Data Module SB B787-A-25-00-0054-00A-932AD, Paragraph 5., Compliance Yes AD Related

Data Module SB B787-A-25-00-0054-00A-932AD, Paragraph 8., Weight and Balance Changes No Weight and Balance Changed

Data Module SB B787-A-25-00-0054-00A-932AD, Paragraph 9., Electrical Load Data No Electrical Load Changed

Data Module SB B787-A-25-00-0054-00A-932AD, Paragraph 11., Publications Affected Yes Publications Affected

Data Module SB B787-A-25-00-0054-00A-932AD, Paragraph 11., Publications Affected No Airplane Flight Operations Affected (Flight CrewOperations Manual and/or FAA Approved Airplane Flight Manual) Data Module SB B787-A-25-00-0054-00A-934AD, Paragraph 3.A., Kits/Parts No Kits/Parts Required

**B787-A-25-00-0054-00A-931C-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 6 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**Table 1 **Data Module Reference Affected**  **Planning Data** Data Module SB B787-A-25-00-0054-00A-934AD, Paragraph 3.B., Parts and Materials Supplied by the Operator Yes Operator Supplied Parts/Material

Data Module SB B787-A-25-00-0054-00A-934AD, Paragraph 6., Special Tooling Necessary to do this Service Bulletin No Special Tooling Required

**3. ACTION** (CN-AA46352D) In the Flight Compartment, replace the Captain and First Officer Seat Assembly as a terminating action. As an interim action, do a test of the Captain and First Officer Seat Assembly and replace the seat horizontal or vertical actuator if necessary. **4. EFFECTIVITY** 787-8 Airplanes. Refer to Data Module SB B787-A-25-00-0054-00A-932A-D, Paragraph 1., Effectivity for the list of affected airplanes. **5. 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. Refer to Data Module SB B787-A-25-00-0054-00A-932A-D, Paragraph 5., Compliance **6. INDUSTRY SUPPORT INFORMATION** Boeing warranty remedies are not available for the configuration changes given in this service bulletin. **7. MANPOWER** Refer to Data Module SB B787-A-25-00-0054-00A-932A-D, Paragraph 7., Manpower. **8. MATERIAL INFORMATION** Operator Supplied Parts/Materials. Refer to Data Module SB B787-A-25-00-0054-00A-934A-D, Paragraph 1., Material - Price and Availability.

**B787-A-25-00-0054-00A-931C-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 7 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**ICN-B787-A-000061-A-81205-08859-A-01-1 Figure 1

**B787-A-25-00-0054-00A-931C-D Applicable To:**  **Issue 001, 19 Dec 2014 End of data module**  Model 787 See Applicability of this data module **Page 8 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB250054-00 **PLANNING INFORMATION**

THIS ALERT SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED **Alert:** OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.


## References **Title Reference**  Work Instructions SB B787-A-25-00-0054-00A-933A-D Issue 001, Step 2. CAPTAIN AND FIRST OFFICER SEAT 787 AMM 25-11-01 

## Description **Group 1:**

**1. Effectivity A. Airplanes**  This service bulletin is applicable to 787-8 Airplanes, line numbers 6-9, 11, 20-21, 23-125, 127-132, 134-138, 140-145, 147-168, 170-180, 182-201 and 203-209 in one Group. The Variable Numbers and Group information for the applicable airplanes is given below. An equivalent change is on subsequent production airplanes. Refer to CN-AA46352 for data about this change.
Table 1 **DESCRIPTION CONFIGURATION**  **GROUP** 787-8 airplanes with Ipeco Captain and First Officer seats (Part Number 3A380-0007-01-6, 3A380-0008-01-6). - 1

Airplane Models: 787-8 Table 2 **Group Variable Number**  1 ZA006 1 ZA100-ZA105 1 ZA116-ZA124 1 ZA135-ZA139 1 ZA175-ZA189 1 ZA215-ZA221

**B787-A-25-00-0054-00A-932A-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 9 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**Table 2 **Group Variable Number**  1 ZA230-ZA246 1 ZA260-ZA268 1 ZA270-ZA275 1 ZA285-ZA295 1 ZA317-ZA322 1 ZA327 1 ZA334 1 ZA380-ZA389 1 ZA430-ZA437 1 ZA445-ZA448 1 ZA450-ZA457 1 ZA460-ZA475 1 ZA506-ZA516 1 ZA536-ZA543 1 ZA560-ZA565 1 ZA576-ZA580 1 ZA586 1 ZA588-ZA589 1 ZA610-ZA612 1 ZA650-ZA651 1 ZA655-ZA658 1 ZA680 1 ZA695 1 ZA778-ZA779 1 ZA841 **B. Spares Affected** None. **2. Concurrent Requirements** None.

**B787-A-25-00-0054-00A-932A-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 10 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN 3. Reason**  This service bulletin gives instructions to replace the Captain and First Officer seat assembly and do a test of the Captain and First Officer seat assembly as an interim action to prevent seat actuator clutch failure resulting in loss of seat locking and un-commanded motion. If this service bulletin is not incorporated, the Captain and First Officer seats may move un-commanded during operation which could lead to reduced controllability of the airplane. An operator reported that a Captain's seat moved un-commanded during landing rollout due to a failure in the seat horizontal actuator. Investigation found press fit clutch pins in the actuator could migrate loose when subjected to repeated dynamic impact loading from clutch re-engagement when the manual horizontal control lever is released with the seat still moving on the tracks. The clutch pins can migrate loose, overturn, and force clutch plate separation, resulting in degraded or failed seat locking. The new Captain and First Officer seat assemblies installed by this service bulletin include new horizontal and vertical actuators which incorporate design changes to the clutch mechanism to improve pin retention and prevent loss of locking due to pin migration. This service bulletin also includes instructions to perform interim tests of Captain and First Officer seat actuator clutch operation to prevent loss of seat locking and un-commanded motion prior to installation of new Captain and First Officer seat assemblies incorporating the new actuators. Boeing Service Related Problem (SRP) 787 SRP-25-0332 is related to this service bulletin. **4. Description** In the Flight Compartment, replace the Captain and First Officer Seat Assembly as a terminating action. As an interim action, do a test of the Captain and First Officer Seat Assembly and replace the seat horizontal or vertical actuator if necessary. The work in this service bulletin is done in the maintenance zone(s) given below. Table 3 **Affected Maintenance Zones Zone**  **Model** 211, 212 787-8 **5. 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. Do the required actions in accordance with Data Module SB B787-A-25-00-0054-00A-933A-D, Step 2., Work Instructions. When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION number or an OPTION number, do all of the ACTION numbers for that CONDITION number or OPTION number.

**B787-A-25-00-0054-00A-932A-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 11 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**Table 4 INTERIM ACTION: CAPTAIN SEAT ASSEMBLY TEST **Repeat Interval (Not to Exceed)**  **Compliance Time Action**  **Condition**

- Within 1000 flight hours after the Issue 001 date of this service bulletin. Do PART 1: INTERIM ACTION: CAPTAIN SEAT ASSEMBLY TEST*[1] All airplanes

1000 flight hours*[2]
- OPTION 1: Repeat PART 1: INTERIM ACTION:CAPTAIN SEAT ASSEMBLY TEST CONDITION 1: NORMAL CLUTCH ENGAGING FOUND

- - OPTION 2: Do PART 3: TERMINATING ACTION:CAPTAIN SEAT ASSEMBLY REPLACEMENT*[2]

- Before further flight. OPTION 3 (ACTION 1): Do PART 2: CAPTAIN SEAT HORIZONTAL OR VERTICAL ACTUATOR REPLACEMENTCONDITION 2: NONNORMAL CLUTCH ENGAGING FOUND

1000 flight hours*[2]
- OPTION 3 (ACTION 2): Repeat PART 1: INTERIM ACTION: CAPTAIN SEAT ASSEMBLY TEST

- - OPTION 4: Do PART 3: TERMINATING ACTION:CAPTAIN SEAT ASSEMBLY REPLACEMENT *[1] Accomplishment of PART 3: TERMINATING ACTION: CAPTAIN SEAT ASSEMBLY REPLACEMENT can be done instead of PART 1: INTERIM ACTION: CAPTAIN SEAT ASSEMBLY TEST. *[2] Accomplishment of PART 3: TERMINATING ACTION: CAPTAIN SEAT ASSEMBLY REPLACEMENT is terminating action to the repeat test in PART 1.

**B787-A-25-00-0054-00A-932A-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 12 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**Table 5 INTERIM ACTION: FIRST OFFICER SEAT ASSEMBLY TEST **Repeat Interval (Not to Exceed)**  **Compliance Time Action**  **Condition**

- Within 1000 flight hours after the Issue 001 date of this service bulletin. Do PART 4: INTERIM ACTION: FIRST OFFICER SEAT ASSEMBLY TEST*[1] All airplanes

1000 flight hours*[2]
- OPTION 5: Repeat PART 4: INTERIM ACTION: FIRST OFFICER SEAT ASSEMBLY TEST CONDITION 1: NORMAL CLUTCH ENGAGING FOUND

- - OPTION 6: Do PART 6: TERMINATING ACTION: FIRST OFFICER SEATASSEMBLY REPLACEMENT*[2]

- Before further flight. OPTION 7 (ACTION 1):Do PART 5: FIRST OFFICER SEAT HORIZONTALOR VERTICAL ACTUATOR REPLACEMENTCONDITION 2: NONNORMAL CLUTCH ENGAGING FOUND

1000 flight hours*[2]
- OPTION 7 (ACTION 2): Repeat PART 4: INTERIM ACTION: FIRST OFFICER SEAT ASSEMBLY TEST

- - OPTION 8: Do PART 6: TERMINATING ACTION : FIRST OFFICER SEATASSEMBLY REPLACEMENT *[1] Accomplishment of PART 6: TERMINATING ACTION: FIRST OFFICER SEAT ASSEMBLY REPLACEMENT can be done instead of PART 4: INTERIM ACTION: FIRST OFFICER SEAT ASSEMBLY TEST. *[2] Accomplishment of PART 6: TERMINATING ACTION: FIRST OFFICER SEAT ASSEMBLY REPLACEMENT is terminating action to the repeat test in PART 4.

**B787-A-25-00-0054-00A-932A-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 13 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**Table 6 TERMINATING ACTION: CAPTAIN AND FIRST OFFICER SEAT ASSEMBLY REPLACEMENT **Repeat Interval (Not to Exceed)**  **Compliance Time Action**  **Condition**

- Within 72 months after theIssue 001 date of this service bulletin.Do PART 3: TERMINATING ACTION: CAPTAINSEAT ASSEMBLY REPLACEMENT All airplanes

- Within 72 months after theIssue 001 date of this service bulletin.Do PART 6: TERMINATING ACTION: FIRST OFFICER SEAT ASSEMBLY REPLACEMENT **6. 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 EuropeanAviation 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. **7. Manpower** Table 7 INTERIM ACTION: CAPTAIN SEAT ASSEMBLY TEST **Elapsed Hours Task Hours**  **Number of Per- sons**  **Task**

0.75 0.75 1 Part 1 *[1] *[1] *[1] Part 2 0.75 0.75 TOTAL FOR EACH AIRPLANE *[1] No time provided for this task. Refer to Ipeco Service Bulletin 380-25-04. Table 8 INTERIM ACTION: FIRST OFFICER SEAT ASSEMBLY TEST **Elapsed Hours Task Hours**  **Number of Per- sons**  **Task**

0.75 0.75 1 Part 4 *[1] *[1] *[1] Part 5 0.75 0.75 TOTAL FOR EACH AIRPLANE *[1] No time provided for this task. Refer to Ipeco Service Bulletin 380-25-04.

**B787-A-25-00-0054-00A-932A-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 14 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**Table 9 TERMINATING ACTION: CAPTAIN AND FIRST OFFICER SEAT ASSEMBLY REPLACEMENT **Elapsed Hours Task Hours**  **Number of Per- sons**  **Task**

0.75 1.50 2 Part 3 0.75 1.50 2 Part 6 1.50 3.00 TOTAL FOR EACH AIRPLANE The time to make the change to the in accordance with Ipeco Service Bulletin 380-25-04 is not included. **8. Weight and Balance Changes** None. **9. Electrical Load Data** Not changed. **10. References A. Existing Data:**  1. Change Notice CN-AA46352D 2. Aircraft Maintenance Manual (AMM) 787 AMM 25-11-01 3. Boeing Service Related Problem (SRP) 787 SRP-25-0332 4. Ipeco Service Bulletin 380-25-04 **B. Data Supplied with this Service Bulletin:** None. **C. Installation Requirement Modules Used in the Preparation of this Service Bulletin:** None. **11. Publications Affected** Table 10**Chapter-Section Publication**  ZA2-11 787 Illustrated Parts Data Damage Tolerance Based Structural Inspections: Boeing has evaluated the repairs and/or changes in this service bulletin for effects on Fatigue Critical Structure (FCS) and for changes to Damage Tolerance Inspections (DTI) required in the Maintenance Program. This service bulletin does not affect FCS, therefore DTIs are not necessary. **12. Interchangeability and Intermixability of Parts** Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts.

**B787-A-25-00-0054-00A-932A-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 15 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN 13. Software Accomplishment Summary**  Not Affected.

**B787-A-25-00-0054-00A-932A-D Applicable To:**  **Issue 001, 19 Dec 2014 End of data module**  Model 787 See Applicability of this data module **Page 16 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB250054-00 **MATERIAL INFORMATION**

THIS ALERT SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN DATA MODULE SB B787-A-25-00-0054-00A-932A-D, PARAGRAPH 1., **Alert:** EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.


## References **Title Reference**  References SB B787-A-25-00-0054-00A-932A-D Issue 001, Paragraph 10. 

## Description **Group 1: 1. Material - Price and Availability**  The operator can supply the parts and materials shown in Paragraph 3., Parts Necessary for Each Airplane . Refer to Ipeco Service Bulletin 380-25-04. **2. Industry Support Information** Boeing warranty remedies are not available for the configuration changes given in this service bulletin. **3. Parts Necessary for Each Airplane A. Kits/Parts:**  None. **B. Parts and Materials Supplied by the Operator:** Table 1 **Notes Existing Part Number**  **Name QTY**  **Part Number / Specification**  *[1] *[2] 3A380-0007-01-6 Captain Seat Assembly 1 3A380-0007-01-7
*[1] *[2] 3A380-0008-01-6 First Officer Seat Assembly 1 3A380-0008-01-7 *[1] New part or make a change to the existing part in accordance with Ipeco Service Bulletin 380-25-04 *[2] Refer to Ipeco Service Bulletin 380-25-04 for instructions to return the existing parts for modification and to get new part.

**B787-A-25-00-0054-00A-934A-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 17 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN C. Parts Modified and Reidentified:**  Table 2 **Notes New Part Number**  **Name QTY**  **Existing Part Number**  *[1] 3A380-0007-01-7 Captain Seat Assembly 1 3A380-0007-01-6
*[1] 3A380-0008-01-7 First Officer Seat As- sembly 1 3A380-0008-01-6

*[1] Make the change in accordance with Ipeco Service Bulletin 380-25-04. **D. Parts Removed and Not Replaced:** None. **4. Parts Necessary to Change Spares** None. **5. Special Tooling - Price and Availability** None. **6. 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 Data Module SB B787-A-25-00-0054-00A-932A-D, Paragraph 10., References, can be necessary. Examine operator tool supply to make sure all necessary tools are available.

**B787-A-25-00-0054-00A-934A-D Applicable To:**  **Issue 001, 19 Dec 2014 End of data module**  Model 787 See Applicability of this data module **Page 18 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB250054-00 **ACCOMPLISHMENT INSTRUCTIONS**

THIS ALERT SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN DATA MODULE SB B787-A-25-00-0054-00A-932A-D, PARAGRAPH 1., **Alert:** EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.


## References **Title Reference**  References SB B787-A-25-00-0054-00A-932A-D Issue 001, Paragraph 10. Compliance SB B787-A-25-00-0054-00A-932A-D Issue 001, Paragraph 5. Alert Service Bulletin B787-81205-SB250054-00 – Appendix A – CAPTAIN SB B787-A-25-00-0054-0AA-931D-D Issue 001 AND FIRST OFFICER SEAT ASSEMBLY TEST [Group 1:] CAPTAIN AND FIRST OFFICER SEAT 787 AMM 25-11-01 

## Procedure **Group 1: 1. 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 Data Module SB B787-A-25-00-0054-00A932A-D, Paragraph 10., References, for definition of the acronyms. 2. Obey all of the warnings and cautions given in the specified manual sections. 3. Unless shown differently, these dimensions and tolerances are used: – Linear dimensions are in inches – Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus or minus 0.03 inch – Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch – Angular tolerance is plus or minus 2 degrees

**B787-A-25-00-0054-00A-933A-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 19 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**– Hole dimensions for standard solid rivets and fasteners are in SRM Chapter 51 – Torque Values: – Values for structural fasteners are given in 787 Structural Repair Manual, Chapter 51.– Values for airframe maintenance tasks are included in Chapter 20 of 787 Aircraft Maintenance Manual (AMM). – Values for electrical maintenance tasks are included in Chapter 20 of Standard Wiring Practices Manual (SWPM).– Values for engine maintenance tasks are included in Chapter 70 of 787 Aircraft Maintenance Manual (AMM).– Non-standard torque values for maintenance tasks are included in the applicable installation step. 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. If it is necessary to remove more parts for access, you can remove those parts. If you can get access without removing identified parts, it is not necessary to remove all of the identified parts. Jacking and shoring limitations must be observed. 6. Where the work instructions include installation of a kept part, a new or serviceable part with the same part number can be installed as an alternative to the kept part. 7. This service bulletin includes functional test procedures for the systems changed by this servicebulletin. More functional tests can possibly be necessary in accordance with standard maintenance practices because of interruption to other airplane systems. 8. If shading is used, shaded areas in Tasks are to separate the non-critical and non-authoritative information from the critical and authoritative information. 9. Use of colors in Tasks is based on guidance from the S1000D International specification for technical publications. 10. When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION number or an OPTION number, do all of the ACTION numbers for that CONDITION number or OPTION number. 11. The compliance times for the actions in Step 2., Work Instructions are in Data Module SB B787- A-25-00-0054-00A-932A-D, Paragraph 5., Compliance. 12. Some steps in the Work Instructions are identified as Required for Compliance (RC). If this service bulletin is mandated by an Airworthiness Directive (AD), then the steps identified as RC must be done to comply with the AD. Alternative procedures for steps not identified with RC can be used if the RC steps can still be done as specified, and the airplane can be put back in aserviceable condition. An Alternative Method of Compliance (AMOC) is not necessary for deviations to steps that are not identified as RC.

**2. WORK INSTRUCTIONS**

**B787-A-25-00-0054-00A-933A-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 20 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**A. Do the INTERIM ACTION: CAPTAIN SEAT ASSEMBLY TEST or TERMINATING ACTION: CAPTAIN SEAT ASSEMBLY REPLACEMENT. (1) INTERIM ACTION: CAPTAIN SEAT ASSEMBLY TEST (a) RC - Do PART 1: INTERIM ACTION: CAPTAIN SEAT ASSEMBLY TEST. 1) CONDITION 1: NORMAL CLUTCH ENGAGING FOUND. a) OPTION 1: Repeat PART 1: INTERIM ACTION: CAPTAIN SEAT ASSEMBLY TEST.b) OPTION 2: Do PART 3: TERMINATING ACTION: CAPTAIN SEAT ASSEMBLY REPLACEMENT to terminate the repeat test. 2) CONDITION 2: NON-NORMAL CLUTCH ENGAGING FOUND. a) OPTION 3: <1> OPTION 3 (ACTION 1): Do PART 2: CAPTAIN SEAT HORIZONTAL OR VERTICAL ACTUATOR REPLACEMENT. <2> OPTION 3 (ACTION 2): Repeat PART 1: INTERIM ACTION: CAPTAIN SEAT ASSEMBLY TEST.b) OPTION 4: Do PART 3: TERMINATING ACTION: CAPTAIN SEAT ASSEMBLY REPLACEMENT to terminate the repeat test. (2) TERMINATING ACTION: CAPTAIN SEAT ASSEMBLY REPLACEMENT (a) RC - Do PART 3: TERMINATING ACTION: CAPTAIN SEAT ASSEMBLY REPLACEMENT. B. Do the INTERIM ACTION: FIRST OFFICER SEAT ASSEMBLY TEST or TERMINATING ACTION: FIRST OFFICER SEAT ASSEMBLY REPLACEMENT. (1) INTERIM ACTION: FIRST OFFICER SEAT ASSEMBLY TEST (a) RC - Do PART 4: INTERIM ACTION: FIRST OFFICER SEAT ASSEMBLY TEST. 1) CONDITION 1: NORMAL CLUTCH ENGAGING FOUND. a) OPTION 5: Repeat PART 4: INTERIM ACTION: FIRST OFFICER SEAT ASSEMBLY TEST b) OPTION 6: Do PART 6: TERMINATING ACTION: FIRST OFFICER SEAT ASSEMBLY REPLACEMENT to terminate the repeat test. 2) CONDITION 2: NON-NORMAL CLUTCH ENGAGING FOUND. a) OPTION 3: <1> OPTION 7 (ACTION 1): Do PART 5: FIRST OFFICER SEAT HORIZONTAL OR VERTICAL ACTUATOR REPLACEMENT. <2> OPTION 7 (ACTION 2): Repeat PART 4: INTERIM ACTION: FIRST OFFICER SEAT ASSEMBLY TEST. b) OPTION 8: Do PART 6: TERMINATING ACTION: FIRST OFFICER SEAT ASSEMBLY REPLACEMENT to terminate the repeat test.

**B787-A-25-00-0054-00A-933A-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 21 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**(2) TERMINATING ACTION: FIRST OFFICER SEAT ASSEMBLY REPLACEMENT(a) RC - Do PART 6: TERMINATING ACTION: FIRST OFFICER SEAT ASSEMBLY REPLACEMENT. C. Put the airplane back to a serviceable condition. D. PART 1: INTERIM ACTION: CAPTAIN SEAT ASSEMBLY TEST(1) RC - Do a test of the Captain seat assembly in accordance with CAPTAIN SEAT AND FIRST OFFICER SEAT ASSEMBLY TEST in Data Module Appendix A, SB B787-A-25-00-0054-0AA-931D-D. E. PART 2: CAPTAIN SEAT HORIZONTAL OR VERTICAL ACTUATOR REPLACEMENT (1) Replace the captain seat horizontal or vertical actuator. Refer to Ipeco Component Maintenance Manual 25-11-69 as an accepted procedure. F. PART 3: TERMINATING ACTION: CAPTAIN SEAT ASSEMBLY REPLACEMENT (1) Remove the Captain Seat Assembly part number 3A380-0007-01-6. Refer to 787 AMM 25-11-01 as an accepted procedure. (2) RC - Install the Captain Seat Assembly part number 3A380-0007-01-7. Refer to 787 AMM 25-11-01 as an accepted procedure. (3) Operate the seat to make sure that it will move freely in the seat tracks and is correctly calibrated. Refer to 787 AMM 25-11-01 as an accepted procedure. G. PART 4: INTERIM ACTION: FIRST OFFICER SEAT ASSEMBLY TEST (1) RC - Do a test of the First Officer seat assembly in accordance with CAPTAIN SEAT AND FIRSTOFFICER SEAT ASSEMBLY TEST in Data Module Appendix A, SB B787-A-25-00-0054-0AA-931DD. H. PART 5: FIRST OFFICER SEAT HORIZONTAL OR VERTICAL ACTUATOR REPLACEMENT (1) Replace the First Officer seat horizontal or vertical actuator. Refer to Ipeco Component Maintenance Manual 25-11-69 as an accepted procedure. I. PART 6: TERMINATING ACTION: FIRST OFFICER SEAT ASSEMBLY REPLACEMENT (1) Remove the First Officer Seat Assembly part number 3A380-0008-01-6. Refer to 787 AMM 25-11- 01 as an accepted procedure. (2) RC - Install the new First Officer Seat Assembly part number 3A380-0008-01-7. Refer to 787 AMM 25-11-01 as an accepted procedure. (3) Operate the seat to make sure that it will move freely in the seat tracks and is correctly calibrated. Refer to 787 AMM 25-11-01 as an accepted procedure.

**B787-A-25-00-0054-00A-933A-D Applicable To:**  **Issue 001, 19 Dec 2014 End of data module**  Model 787 See Applicability of this data module **Page 22 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB250054-00 **Appendix A – CAPTAIN AND FIRST OFFICER SEAT ASSEMBLY TEST [Group 1:]** 
THIS ALERT SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN DATA MODULE SB B787-A-25-00-0054-00A-932A-D, PARAGRAPH 1., **Alert:** EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.



## Procedure **Group 1:** 1. The following tests are to be carried out with the seat occupied and in a locked position. A. Horizontal Movement Test Operate the seat through its full range of horizontal movement to make sure that the seat can move fully and freely between the stops and locks in all positions. If necessary, adjust the seat track alignment. Refer to IPECO Component Maintenance Manual 25-11-69 as an accepted procedure. NOTE: INCORRECT ADJUSTMENT OF THE MANUAL OVERRIDE CABLE MAY RESULT IN UNCOMMANDED MOVEMENT OF THE SEAT UNDER LOAD, DAMAGE AND/OR FAILURE OF THE HORIZONTAL ACTUATOR. NOTE: WHEN THE SEAT IS BEING ADJUSTED MANUALLY, ENSURE THE SEAT IS STOPPED BEFORE RELEASING THE MANUAL CONTROL LEVER. B. Horizontal Actuator Manual Override Lever Test (1) Adjust the seat height to the lowest vertical position. Refer to IPECO Component Maintenance Manual 25-11-69 as an accepted procedure. (2) Operate the manual override lever and measure for excessive free play (more than 0.13 inch free play measured at tip of lever) NOTE: Excessive lever free play may be due to a control cable that is out of adjustment, or may indicate the actuator clutch is only partially engaging. (a) If excessive free play is found, adjust the cable as follows (see Detail A illustration below): 1) Loosen the horizontal actuator manual override cable lock nut. 2) Move the cable adjustment nut until there is a free play of 0.06 - 0.13 inch in the horizontal lever. 3) Tighten the manual override cable lock nut. 4) Make sure that there is free movement in the horizontal lever and readjust until there is free movement.

**B787-A-25-00-0054-0AA-931D-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 23 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**5) Operate the horizontal lever and make sure that the horizontal lever moves smoothly back to its original position when released. If the lever does not move smoothly, the seat has the non-normal clutch engaging. (b) If normal free play is found (0.06 - 0.13 inch), operate the horizontal lever and make sure that the horizontal lever moves smoothly back to its original position when released. If the lever does not move smoothly, the seat has the non-normal clutch engaging. C. Vertical Movement Test Operate the seat through its full range of vertical movement to make sure that the seat can move fully and freely between the stops and locks in all positions. If necessary, remove obstruction or replacebraided rubber cords. Refer to IPECO Component Maintenance Manual 25-11-69 as an accepted procedure. NOTE: INCORRECT ADJUSTMENT OF THE MANUAL OVERRIDE CABLE MAY RESULT IN UNCOMMANDED MOVEMENT OF THE SEAT UNDER LOAD, DAMAGE AND/OR FAILURE OF THE VERTICAL ACTUATOR. NOTE: WHEN THE SEAT IS BEING ADJUSTED MANUALLY, ENSURE THE SEAT IS STOPPED BEFORE RELEASING THE MANUAL CONTROL LEVER. D. Vertical Actuator Manual Override Lever Test (1) Adjust the seat height to the lowest vertical position. Refer to IPECO Component Maintenance Manual 25-11-69 as an accepted procedure. (2) Operate the manual override lever and measure for excessive free play (more than 0.13 inch free play measured at tip of lever). NOTE: Excessive lever free play may be due to a control cable that is out of adjustment, or may indicate the actuator clutch is only partially engaging. (a) If excessive free play is found, adjust the cable as follows (see Detail B illustration below): 1) Loosen the vertical actuator manual override cable lock nut. 2) Move the cable adjustment nut until there is a free play of 0.06 - 0.13 inch in the vertical lever. 3) Tighten the manual override cable lock nut. 4) Make sure that there is free movement in the vertical lever and readjust until there is free movement. 5) Operate the vertical lever and make sure that the vertical lever moves smoothly back to itsoriginal position when released. If the lever does not move smoothly, the seat has the nonnormal clutch engaging. (b) If normal free play is found (0.06 - 0.13 inch), operate the vertical lever and make sure that the vertical lever moves smoothly back to its original position when released. If the lever does not move smoothly, the seat has the non-normal clutch engaging.

**B787-A-25-00-0054-0AA-931D-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 24 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**ICN-B787-A-000061-A-81205-08860-A-01-1 Figure 1

**B787-A-25-00-0054-0AA-931D-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 25 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**ICN-B787-A-000061-A-81205-08861-A-01-1 Figure 2

**B787-A-25-00-0054-0AA-931D-D Applicable To:**  **Issue 001, 19 Dec 2014** Model 787 See Applicability of this data module **Page 26 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**ICN-B787-A-000061-A-81205-08862-A-01-1 Figure 3

**B787-A-25-00-0054-0AA-931D-D Applicable To:**  **Issue 001, 19 Dec 2014 End of data module**  Model 787 See Applicability of this data module **Page 27 of 27** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB250054-00 Issue 001, 19 Dec 2014**  **AIRCRAFT SERVICE BULLETIN**