## Alert Service Bulletin B787-81205-SB270021-00 FLIGHT CONTROLS - **Leading Edge Slat Skew Detection System - Slat Skew Detection Mechanism Assembly Change**  Issue 001, 20 Mar 2014 B787-81205-SB270021-00 **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 Unpublished Work.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-27-00-0021-00A-932A-D, Paragraph 1., Effectivity for the list of affected airplanes.

**B787-81205-SB270021-00 TITLE PAGE**  **Issue 001, 20 Mar 2014 Page 1 of 21**  EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. 2.0 **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB270021-00 **Table of Contents** Page Summary.....................................................5 PLANNING INFORMATION ..........................................9 1. Effectivity .............................................9 A. Airplanes ............................................9 B. Spares Affected. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2. Concurrent Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3. Reason. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4. Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 9. Electrical Load Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 10. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 A. Existing Data:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 B. Data Supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . 13 C. Installation Requirement Modules Used in the Preparation of this Service Bulletin: . . . 13 11. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 12. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . 14 13. Software Accomplishment Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3. Parts Necessary for Each Airplane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 A. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 B. Parts and Materials Supplied by the Operator:. . . . . . . . . . . . . . . . . . . . . . . 15 C. Parts Modified and Reidentified:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 D. Parts Removed and Not Replaced: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 6. Special Tooling Necessary to do this Service Bulletin. . . . . . . . . . . . . . . . . . . . . 17 ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 1. GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

**B787-81205-SB270021-00 TABLE OF CONTENTS**  **Issue 001, 20 Mar 2014 Page 2 of 21**  EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB270021-00 **List of Illustrations**
THIS ALERT SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN DATA MODULE SB B787-A-27-00-0021-00A-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-SB270021-00 **Used In ICN**  B787-A-27-00-0021-00A-931C-D Issue 001 ICN-B787-A-000061-A-81205-06990-A-01-1

**B787-A-27-00-0021-00A-00AA-D Applicable To:**  **Issue 001, 20 Mar 2014 End of data module**  Model 787 See Applicability of this data module **Page 3 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB270021-00 **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-27-00-0021-00A-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-SB270021-00 **Issue Date Issue Status**  **Issue Data Module – Information Name**  2014-03-20 New 001 B787-A-27-00-0021-00A-00AA-D – List of Illustrations 2014-03-20 New 001 B787-A-27-00-0021-00A-00SA-D – List of Effective Data Modules 2014-03-20 New 001 B787-A-27-00-0021-00A-931C-D – Summary 2014-03-20 New 001 B787-A-27-00-0021-00A-932A-D – PLANNING INFORMATION 2014-03-20 New 001 B787-A-27-00-0021-00A-934A-D – MATERIAL INFORMATION 2014-03-20 New 001 B787-A-27-00-0021-00A-933A-D – ACCOMPLISHMENT INSTRUCTIONS

**B787-A-27-00-0021-00A-00SA-D Applicable To:**  **Issue 001, 20 Mar 2014 End of data module**  Model 787 See Applicability of this data module **Page 4 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB270021-00 **Summary**

THIS ALERT SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN DATA MODULE SB B787-A-27-00-0021-00A-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-27-00-0021-00A-932A-D Issue 001, Paragraph 1.B. Compliance SB B787-A-27-00-0021-00A-932A-D Issue 001, Paragraph 5. Weight and Balance Changes SB B787-A-27-00-0021-00A-932A-D Issue 001, Paragraph 8. Electrical Load Data SB B787-A-27-00-0021-00A-932A-D Issue 001, Paragraph 9. Publications Affected SB B787-A-27-00-0021-00A-932A-D Issue 001, Paragraph 11. Kits/Parts SB B787-A-27-00-0021-00A-934A-D Issue 001, Paragraph 3.A. Parts and Materials Supplied by the Operator SB B787-A-27-00-0021-00A-934A-D Issue 001, Paragraph 3.B. Special Tooling Necessary to do this Service Bulletin SB B787-A-27-00-0021-00A-934A-D Issue 001, Paragraph 6. Effectivity SB B787-A-27-00-0021-00A-932A-D Issue 001, Paragraph 1. Manpower SB B787-A-27-00-0021-00A-932A-D Issue 001, Paragraph 7. Material - Price and Availability SB B787-A-27-00-0021-00A-934A-D Issue 001, Paragraph 1.

**B787-A-27-00-0021-00A-931C-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 5 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**

## Description **Group 1: 1. CONCURRENT REQUIREMENTS**  None. **2. BACKGROUND** This service bulletin provides instructions to install new outboard leading edge slat skew detection mechanism assemblies (DMAs). Several failures of the proximity sensor within the slat skew DMA have occurred leading to slats up landing events. It was determined that the failed sensors had broken magnet wires. The wires broke due to stresses induced by thermal expansion and contraction of an epoxy applied around them. The new sensors incorporate a new design that isolates the wires from the epoxy used inside the sensor. If the changes in this service bulletin are not done, the sensors may fail and slats may not extend, which could lead to reduced controllability of the airplane during landing. Boeing Service Related Problem (SRP) 787 SRP-27-0248 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-27-00-0021-00A-932AD, Paragraph 1.B., Spares Affected Yes Spares Affected

Data Module SB B787-A-27-00-0021-00A-932AD, Paragraph 5., Compliance No AD Related

Data Module SB B787-A-27-00-0021-00A-932AD, Paragraph 8., Weight and Balance Changes No Weight and Balance Changed

Data Module SB B787-A-27-00-0021-00A-932AD, Paragraph 9., Electrical Load Data No Electrical Load Changed

Data Module SB B787-A-27-00-0021-00A-932AD, Paragraph 11., Publications Affected Yes Publications Affected

Data Module SB B787-A-27-00-0021-00A-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-27-00-0021-00A-934AD, Paragraph 3.A., Kits/Parts No Kits/Parts Required

Data Module SB B787-A-27-00-0021-00A-934AD, Paragraph 3.B., Parts and Materials Supplied by the Operator Yes Operator Supplied Parts/Material

Data Module SB B787-A-27-00-0021-00A-934AD, Paragraph 6., Special Tooling Necessary to do this Service Bulletin No Special Tooling Required

**B787-A-27-00-0021-00A-931C-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 6 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN 3. ACTION**  (CN-AA45746C) Gain access to the slat skew DMA installed in Slat No. 5 and Slat No. 8. Remove the slat skew DMAs and install new slat skew DMAs. Mark the identification plate on the slat with the new slat part number. Do the functional test of each slat skew DMA. **4. EFFECTIVITY** 787-8 Airplanes. Refer to Data Module SB B787-A-27-00-0021-00A-932A-D, Paragraph 1., Effectivity for the list of affected airplanes. **5. COMPLIANCE** Boeing recommends that the change given in this service bulletin be done within 24 months after the Issue 001 date on this service bulletin. **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-27-00-0021-00A-932A-D, Paragraph 7., Manpower. **8. MATERIAL INFORMATION** Operator Supplied Parts/Materials. Refer to Data Module SB B787-A-27-00-0021-00A-934A-D, Paragraph 1., Material - Price and Availability.

**B787-A-27-00-0021-00A-931C-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 7 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**ICN-B787-A-000061-A-81205-06990-A-01-1 Figure 1

**B787-A-27-00-0021-00A-931C-D Applicable To:**  **Issue 001, 20 Mar 2014 End of data module**  Model 787 See Applicability of this data module **Page 8 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB270021-00 **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-27-00-0021-00A-933A-D Issue 001, Step 2. Parts Necessary for Each Airplane SB B787-A-27-00-0021-00A-934A-D Issue 001, Paragraph 3. BOLT AND NUT INSTALLATION SOPM 20-50-01 APPLICATION OF STENCILS, INSIGNIA, SILK SCREEN, PART NUMBERING AND IDENTIFICATION MARKINGS SOPM 20-50-10

Standard Wiring Practices Manual SWPM 20-10-11 Standard Wiring Practices Manual SWPM 20-10-12 Standard Wiring Practices Manual SWPM 20-10-19 OUTBOARD LEADING EDGE SLAT SKEW MECHANISM 787 AMM 27-89-03

OUTBOARD LEADING EDGE SLAT SKEW LANYARD 787 AMM 27-89-04


## Description **Group 1:**

**1. Effectivity A. Airplanes**  This service bulletin is applicable to 787-8 Airplanes, line numbers 7-9, 20-21, 23-125, 127-132, 134- 138, 140-145, 147-149, 151-153, 155-156 in one Group(s). The Variable Numbers and Group information for the applicable airplanes is given below. An equivalent change is on subsequent production airplanes. Refer to CN-AA45746 for data about this change.

**B787-A-27-00-0021-00A-932A-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 9 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**Table 1 **DESCRIPTION CONFIGURATION**  **GROUP** 787-8 airplanes

- 1 Airplane Models: 787-8 Table 2 **Group Variable Number**  1 ZA100-ZA105 1 ZA116-ZA124 1 ZA135 1 ZA175-ZA188 1 ZA215-ZA217 1 ZA230-ZA243 1 ZA260-ZA264 1 ZA270-ZA274 1 ZA285-ZA294 1 ZA317-ZA320 1 ZA327 1 ZA380-ZA387 1 ZA430-ZA436 1 ZA445-ZA447 1 ZA450-ZA453 1 ZA460-ZA471 1 ZA506-ZA516 1 ZA536-ZA540 1 ZA560-ZA564 1 ZA576-ZA578 1 ZA586 1 ZA650 1 ZA778

**B787-A-27-00-0021-00A-932A-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 10 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN B. Spares Affected**  Examine your spares supply for the parts or components identified below. If any parts or components are found, refer to Data Module SB B787-A-27-00-0021-00A-933A-D, Step 2., Work Instructions for the recommended action. Table 3 **Name Part Number**  Slat No. 5 145Z0201-11-8 Slat No. 8 145Z0201-12-8 Slat No. 5 145Z0201-21-4 Slat No. 8 145Z0201-22-4 Slat No. 5 145Z0201-21-3 Slat No. 8 145Z0201-22-3 Slat No. 5 145Z0201-21-5 Slat No. 8 145Z0201-22-5 Slat No. 5 145Z0201-21-8 Slat No. 8 145Z0201-22-8 Slat No. 5 145Z0201-21-9 Slat No. 8 145Z0201-22-9 Slat No. 5 145Z0201-31-1 Slat No. 8 145Z0201-32-1 Slat No. 5 145Z0201-33-1 Slat No. 8 145Z0201-34-1
**2. Concurrent Requirements** None. **3. Reason** This service bulletin provides instructions to install new outboard leading edge slat skew detection mechanism assemblies (DMAs). Several failures of the proximity sensor within the slat skew DMA have occurred leading to slats up landing events. It was determined that the failed sensors had broken magnet wires. The wires broke due to stresses induced by thermal expansion and contraction of an epoxy applied around them. The new sensors incorporate a new design that isolates the wires from the epoxy used inside the sensor. If the changes in this service bulletin are not done, the sensors may fail and slats may not extend, which could lead to reduced controllability of the airplane during landing.

**B787-A-27-00-0021-00A-932A-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 11 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN 4. Description**  Gain access to the slat skew DMA installed in Slat No. 5 and Slat No. 8. Remove the slat skew DMAs and install new slat skew DMAs. Mark the identification plate on the slat with the new slat part number. Do the functional test of each slat skew DMA. The work in this service bulletin is done in the maintenance zone(s) given below. Table 4 **Affected Maintenance Zones Zone**  **Model** 522, 622 787-8 **5. Compliance** Boeing recommends that the change given in this service bulletin be done within 24 months after the Issue 001 date on this service bulletin. **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 5 WORK PACKAGE 1 - Slat No 5. Slat Skew DMA Replacement **Elapsed Hours Task Hours**  **Number of Per- sons**  **Task**

1.00 1.00 1 Open Access 1.00 1.00 1 Remove DMA 1.00 1.00 1 Install New DMA 1.25 1.25 1 Test 5.25 5.25 TOTAL FOR WORK PACKAGE 1 Table 6 WORK PACKAGE 2 - Slat No. 8 Slat Skew DMA Replacement **Elapsed Hours Task Hours**  **Number of Per- sons**  **Task**

1.00 1.00 1 Open Access 1.00 1.00 1 Remove DMA

**B787-A-27-00-0021-00A-932A-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 12 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**Table 6 WORK PACKAGE 2 - Slat No. 8 Slat Skew DMA Replacement **Elapsed Hours Task Hours**  **Number of Per- sons**  **Task**

1.00 1.00 1 Install new DMA 1.25 1.25 1 Test 5.25 5.25 TOTAL FOR WORK PACKAGE 2 **8. Weight and Balance Changes** None. **9. Electrical Load Data** Not changed. **10. References A. Existing Data:**  1. Change Notice CN-AA45746C 2. Aircraft Maintenance Manual (AMM) 787 AMM 27-89-03, 787 AMM 27-89-04 3. Boeing Service Related Problem (SRP) 787 SRP-27-0248 4. Standard Overhaul Practices Manual (SOPM) SOPM 20-50-01, SOPM 20-50-10 5. Standard Wiring Practices Manual (SWPM) SWPM 20-10-11, SWPM 20-10-12, SWPM 20-10-19 6. Moog Service Bulletin P683A0001-27-01 **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 7 **Chapter-Section Publication**  IPD ZA5-22 ZA6-22 787 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.

**B787-A-27-00-0021-00A-932A-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 13 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN 12. Interchangeability and Intermixability of Parts**  Refer to Data Module SB B787-A-27-00-0021-00A-934A-D, Paragraph 3., Parts Necessary for Each Airplane, for interchangeability and intermixability information. **13. Software Accomplishment Summary** Not Affected.

**B787-A-27-00-0021-00A-932A-D Applicable To:**  **Issue 001, 20 Mar 2014 End of data module**  Model 787 See Applicability of this data module **Page 14 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB270021-00 **MATERIAL INFORMATION**

THIS ALERT SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN DATA MODULE SB B787-A-27-00-0021-00A-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-27-00-0021-00A-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, and Paragraph 4., Parts Necessary to Change Spares. Refer to Moog SB P683A0001-27-01 for additional information. **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] P683A0001-03 Slat Skew Detection Mechanism Assembly (DMA) 2 P683A0001-04

*[1] Refer to Moog SB P683A0001-27-01 for warranty and part ordering information. *[2] One slat skew DMA is required for Slat No. 5 and one slat skew DMA is required for Slat No. 8.

**B787-A-27-00-0021-00A-934A-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 15 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN C. Parts Modified and Reidentified:**  Table 2 **Notes New Part Number**  **Name QTY**  **Existing Part Number**  *[1] 145Z0201-15-1 Slat No. 5 1 145Z0201-11-8 145Z0201-16-1 Slat No. 8 1 145Z0201-12-8 145Z0201-25-1 Slat No. 5 1 145Z0201-21-4 145Z0201-26-1 Slat No. 8 1 145Z0201-22-4 145Z0201-25-2 Slat No. 5 1 145Z0201-21-3 145Z0201-26-2 Slat No. 8 1 145Z0201-22-3 145Z0201-25-3 Slat No. 5 1 145Z0201-21-5 145Z0201-26-3 Slat No. 8 1 145Z0201-22-5 145Z0201-25-4 Slat No. 5 1 145Z0201-21-8 145Z0201-26-4 Slat No. 8 1 145Z0201-22-8 145Z0201-25-5 Slat No. 5 1 145Z0201-21-9 145Z0201-26-5 Slat No. 8 1 145Z0201-22-9 145Z0201-27-1 Slat No. 5 1 145Z0201-31-1 145Z0201-28-1 Slat No. 8 1 145Z0201-32-1 145Z0201-37-2 Slat No. 5 1 145Z0201-33-1 145Z0201-38-2 Slat No. 8 1 145Z0201-34-1 *[1] You cannot use the existing part to replace the new or changed part. **D. Parts Removed and Not Replaced:** None. **4. Parts Necessary to Change Spares** To get the parts shown below, refer to Paragraph 1., Material - Price and Availability. Table 3 **QTY Name**  **Part Number** 2*[1] Slat Skew Detection Mechanism Assembly (DMA) P683A0001-04

*[1] One slat skew DMA is required for Slat No. 5 and one slat skew DMA is required for Slat No. 8.

**B787-A-27-00-0021-00A-934A-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 16 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN 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-27-00-0021-00A-932A-D, Paragraph 10., References, can be necessary. Examine operator tool supply to make sure all necessary tools are available.

**B787-A-27-00-0021-00A-934A-D Applicable To:**  **Issue 001, 20 Mar 2014 End of data module**  Model 787 See Applicability of this data module **Page 17 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**

## Alert Service Bulletin B787-81205-SB270021-00 **ACCOMPLISHMENT INSTRUCTIONS**

THIS ALERT SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN DATA MODULE SB B787-A-27-00-0021-00A-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-27-00-0021-00A-932A-D Issue 001, Paragraph 10. Manpower SB B787-A-27-00-0021-00A-932A-D Issue 001, Paragraph 7. Compliance SB B787-A-27-00-0021-00A-932A-D Issue 001, Paragraph 5. Standard Wiring Practices Manual SWPM 20-10-11 Standard Wiring Practices Manual SWPM 20-10-12 Standard Wiring Practices Manual SWPM 20-10-19 BOLT AND NUT INSTALLATION SOPM 20-50-01 APPLICATION OF STENCILS, INSIGNIA, SILK SCREEN, PART NUMBERING AND IDENTIFICATION MARKINGS SOPM 20-50-10

OUTBOARD LEADING EDGE SLAT SKEW MECHANISM 787 AMM 27-89-03

OUTBOARD LEADING EDGE SLAT SKEW LANYARD 787 AMM 27-89-04



## Procedure **Group 1: 1. GENERAL INFORMATION** 

**B787-A-27-00-0021-00A-933A-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 18 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN 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-27-00-0021-00A932A-D, Paragraph 10., References, for definition of the acronyms. 2. Obey all of the warnings and cautions given in the specified manual sections. 3. The work instructions are divided into work packages. Task Hours and Elapsed Hours for each package are given in Data Module SB B787-A-27-00-0021-00A-932A-D, Paragraph 7., Manpower. You can do each work package independently. 4. 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 – 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 Airplane 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 Airplane Maintenance Manual (AMM).– Non-standard torque values for maintenance tasks are included in the applicable installation step. 5. Use the approved fastener, process and material substitutions in accordance with SRM Chapter 51. 6. Refer to the SWPM 20-10-11 and SWPM 20-10-12 for the wire installation procedures, and SWPM 20-10-19 for the wire separation requirements, as accepted procedures. 7. If the length of any fastener specified in this service bulletin does not meet the installationstandards in SRM Chapter 51, then a fastener of the same specification, or an approved substitute, with a length which meets the installation standards in SRM Chapter 51 may be used. In addition, washers may be installed for fastener grip length in accordance with SRM Chapter 51. Refer to SOPM 20-50-01 for alternate full threaded fasteners (screws) needed for installation in this service bulletin. 8. 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.

**B787-A-27-00-0021-00A-933A-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 19 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**9. 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. 10. 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. 11. 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. 12. If shading is used, shaded areas in Figures are to separate the non-critical and non-authoritative information from the critical and authoritative information. 13. The compliance times for the actions in Step 2., Work Instructions are in Data Module SB B787- A-27-00-0021-00A-932A-D, Paragraph 5., Compliance.

**2. WORK INSTRUCTIONS A. WORK PACKAGE 1 - Slat No. 5 DMA Replacement**  Remove the slat skew DMA from Slat No. 5. Refer to 787 AMM 27-89-03, Outboard Leading Edge Slat Skew Detection Mechanism Assembly - Removal, as an accepted procedure. (1) (2) Install the new slat skew DMA, part number P683A0001-04, in Slat No. 5. Refer to 787 AMM 27-89- 03, Outboard Leading Edge Slat Skew Detection Mechanism Assembly - Installation, as an accepted procedure. (3) Mark the existing identification plate on Slat No. 5 with the new part number using the part numbersprovided in Table 1, Slat No. 5 Part Identification, to indicate that this service bulletin has been accomplished. Refer to SOPM 20-50-10, Vibroengraving (Code VE), as an accepted procedure. Table 1 Slat No. 5 Part Identification**New Part Number Name**  **Existing Part Number** 145Z0201-15-1 Slat No. 5 145Z0201-11-8 145Z0201-25-1 Slat No. 5 145Z0201-21-4 145Z0201-25-2 Slat No. 5 145Z0201-21-3 145Z0201-25-3 Slat No. 5 145Z0201-21-5 145Z0201-25-4 Slat No. 5 145Z0201-21-8 145Z0201-25-5 Slat No. 5 145Z0201-21-9 145Z0201-27-1 Slat No. 5 145Z0201-31-1 145Z0201-37-2 Slat No. 5 145Z0201-33-1 (4) Do the Outboard Leading Edge Slat Skew Lanyard - Functional Test. Refer to 787 AMM 27-89-04 as an accepted procedure.

**B787-A-27-00-0021-00A-933A-D Applicable To:**  **Issue 001, 20 Mar 2014** Model 787 See Applicability of this data module **Page 20 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN B. WORK PACKAGE 2 - Slat No. 8 DMA Replacement**  Remove the slat skew DMA from Slat No. 8. Refer to 787 AMM 27-89-03, Outboard Leading Edge Slat Skew Detection Mechanism Assembly - Removal, as an accepted procedure. (1) (2) Install the new slat skew DMA, part number P683A0001-04, in Slat No. 8. Refer to 787 AMM 27-89- 03, Outboard Leading Edge Slat Skew Detection Mechanism Assembly - Installation, as an accepted procedure. (3) Mark the existing identification plate on Slat No. 8 with the new part number using the part numbersprovided in Table 2, Slat No. 8 Part Identification, to indicate that this service bulletin has been accomplished. Refer to SOPM 20-50-10, Vibroengraving (Code VE), as an accepted procedure. Table 2 Slat No. 8 Part Identification
**New Part Number Name**  **Existing Part Number** 145Z0201-16-1 Slat No. 8 145Z0201-12-8 145Z0201-26-1 Slat No. 8 145Z0201-22-4 145Z0201-26-2 Slat No. 8 145Z0201-22-3 145Z0201-26-3 Slat No. 8 145Z0201-22-5 145Z0201-26-4 Slat No. 8 145Z0201-22-8 145Z0201-26-5 Slat No. 8 145Z0201-22-9 145Z0201-28-1 Slat No. 8 145Z0201-32-1 145Z0201-38-2 Slat No. 8 145Z0201-34-1 (4) Do the Outboard Leading Edge Slat Skew Lanyard - Functional Test. Refer to 787 AMM 27-89-04 as an accepted procedure. C. Put the airplane back to a serviceable condition.

**B787-A-27-00-0021-00A-933A-D Applicable To:**  **Issue 001, 20 Mar 2014 End of data module**  Model 787 See Applicability of this data module **Page 21 of 21** EXPORT CONTROLLED ECCN: 9E991 BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details. **B787-81205-SB270021-00 Issue 001, 20 Mar 2014**  **AIRCRAFT SERVICE BULLETIN**