Alert Service Bulletin B787-81205-SB270021-00 FLIGHT CONTROLS -

Leading Edge Slat Skew Detection System - Slat Skew Detection Mechanism

Assembly Change

Publication: B787-81205-SB270021-00 Issue 001, 20 Mar 2014

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 Unpublished Work.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 licensed on a per

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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.

TITLE PAGE B787-81205-SB270021-00

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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

TABLE OF CONTENTS B787-81205-SB270021-00

Issue 001, 20 Mar 2014

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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

ICN Used In

ICN-B787-A-000061-A-81205-06990-A-01-1 B787-A-27-00-0021-00A-931C-D Issue 001

Applicable To: B787-A-27-00-0021-00A-00AA-D

Model 787 End of data module Issue 001, 20 Mar 2014

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B787-81205-SB270021-00

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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

Data Module – Information Name Issue Issue Status Issue Date

B787-A-27-00-0021-00A-00AA-D – List of Illustrations 001 New 2014-03-20

B787-A-27-00-0021-00A-00SA-D – List of Effective Data Modules 001 New 2014-03-20

B787-A-27-00-0021-00A-931C-D – Summary 001 New 2014-03-20

B787-A-27-00-0021-00A-932A-D – PLANNING INFORMATION 001 New 2014-03-20

B787-A-27-00-0021-00A-934A-D – MATERIAL INFORMATION 001 New 2014-03-20

B787-A-27-00-0021-00A-933A-D – ACCOMPLISHMENT INSTRUCTIONS 001 New 2014-03-20

Applicable To: B787-A-27-00-0021-00A-00SA-D

Model 787 End of data module Issue 001, 20 Mar 2014

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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

Reference Title

SB B787-A-27-00-0021-00A-932A-D Issue 001, Spares Affected

Paragraph 1.B.

SB B787-A-27-00-0021-00A-932A-D Issue 001, Compliance

Paragraph 5.

SB B787-A-27-00-0021-00A-932A-D Issue 001, Weight and Balance Changes

Paragraph 8.

SB B787-A-27-00-0021-00A-932A-D Issue 001, Electrical Load Data

Paragraph 9.

SB B787-A-27-00-0021-00A-932A-D Issue 001, Publications Affected

Paragraph 11.

SB B787-A-27-00-0021-00A-934A-D Issue 001, Kits/Parts

Paragraph 3.A.

SB B787-A-27-00-0021-00A-934A-D Issue 001, Parts and Materials Supplied by the Operator

Paragraph 3.B.

SB B787-A-27-00-0021-00A-934A-D Issue 001, Special Tooling Necessary to do this Service Bulletin

Paragraph 6.

SB B787-A-27-00-0021-00A-932A-D Issue 001, Effectivity

Paragraph 1.

SB B787-A-27-00-0021-00A-932A-D Issue 001, Manpower

Paragraph 7.

SB B787-A-27-00-0021-00A-934A-D Issue 001, Material - Price and Availability

Paragraph 1.

Applicable To: B787-A-27-00-0021-00A-931C-D

Model 787 Issue 001, 20 Mar 2014

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B787-81205-SB270021-00

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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 

Planning Data Affected Data Module Reference

Data Module SB B787-A-27-00-0021-00A-932AD, Paragraph 1.B., Spares AffectedSpares Affected Yes

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

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

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

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

Data Module SB B787-A-27-00-0021-00A-932AD, Paragraph 11., Publications AffectedAirplane Flight Operations Affected (Flight Crew No

Operations Manual and/or FAA Approved Airplane Flight Manual)

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

Data Module SB B787-A-27-00-0021-00A-934AD, Paragraph 3.B., Parts and Materials Supplied

by the Operator

Operator Supplied Parts/Material Yes

Data Module SB B787-A-27-00-0021-00A-934AD, Paragraph 6., Special Tooling Necessary to

do this Service Bulletin

Special Tooling Required No

Applicable To: B787-A-27-00-0021-00A-931C-D

Model 787 Issue 001, 20 Mar 2014

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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.

Applicable To: B787-A-27-00-0021-00A-931C-D

Model 787 Issue 001, 20 Mar 2014

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AIRCRAFT SERVICE BULLETIN
ICN-B787-A-000061-A-81205-06990-A-01-1

Figure 1 

Applicable To: B787-A-27-00-0021-00A-931C-D

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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

Reference Title

SB B787-A-27-00-0021-00A-933A-D Issue 001, Step 2. Work Instructions

SB B787-A-27-00-0021-00A-934A-D Issue 001, Parts Necessary for Each Airplane

Paragraph 3.

SOPM 20-50-01 BOLT AND NUT INSTALLATION

APPLICATION OF STENCILS, INSIGNIA, SILK

SCREEN, PART NUMBERING AND

IDENTIFICATION MARKINGS

SOPM 20-50-10

SWPM 20-10-11 Standard Wiring Practices Manual

SWPM 20-10-12 Standard Wiring Practices Manual

SWPM 20-10-19 Standard Wiring Practices Manual

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.

Applicable To: B787-A-27-00-0021-00A-932A-D

Model 787 Issue 001, 20 Mar 2014

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AIRCRAFT SERVICE BULLETIN
Table 1 

GROUP CONFIGURATION DESCRIPTION

1 - 787-8 airplanes

Airplane Models: 787-8

Table 2 

Variable Number Group

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 1

Applicable To: B787-A-27-00-0021-00A-932A-D

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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 

Part Number Name

145Z0201-11-8 Slat No. 5

145Z0201-12-8 Slat No. 8

145Z0201-21-4 Slat No. 5

145Z0201-22-4 Slat No. 8

145Z0201-21-3 Slat No. 5

145Z0201-22-3 Slat No. 8

145Z0201-21-5 Slat No. 5

145Z0201-22-5 Slat No. 8

145Z0201-21-8 Slat No. 5

145Z0201-22-8 Slat No. 8

145Z0201-21-9 Slat No. 5

145Z0201-22-9 Slat No. 8

145Z0201-31-1 Slat No. 5

145Z0201-32-1 Slat No. 8

145Z0201-33-1 Slat No. 5

145Z0201-34-1 Slat No. 8

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.

Applicable To: B787-A-27-00-0021-00A-932A-D

Model 787 Issue 001, 20 Mar 2014

See Applicability of this data module

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B787-81205-SB270021-00

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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

Model Zone

787-8 522, 622

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 European

Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on the airplane

in its original Boeing delivery configuration or as modified by other approved Boeing changes.

If an airplane has a non-Boeing modification or repair that affects a component or system also affected by

this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before

incorporating this service bulletin.

7. Manpower

Table 5 WORK PACKAGE 1 - Slat No 5. Slat Skew DMA Replacement

Number of Per- Task Hours Elapsed Hours

sons

Task

Open Access 1 1.00 1.00

Remove DMA 1 1.00 1.00

Install New DMA 1 1.00 1.00

Test 1 1.25 1.25

TOTAL FOR WORK PACKAGE 1 5.25 5.25

Table 6 WORK PACKAGE 2 - Slat No. 8 Slat Skew DMA Replacement

Number of Per- Task Hours Elapsed Hours

sons

Task

Open Access 1 1.00 1.00

Remove DMA 1 1.00 1.00

Applicable To: B787-A-27-00-0021-00A-932A-D

Model 787 Issue 001, 20 Mar 2014

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AIRCRAFT SERVICE BULLETIN
Table 6 WORK PACKAGE 2 - Slat No. 8 Slat Skew DMA Replacement

Number of Per- Task Hours Elapsed Hours

sons

Task

Install new DMA 1 1.00 1.00

Test 1 1.25 1.25

TOTAL FOR WORK PACKAGE 2 5.25 5.25

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 

Publication Chapter-Section

787 Illustrated Parts Data IPD ZA5-22 ZA6-22

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.

Applicable To: B787-A-27-00-0021-00A-932A-D

Model 787 Issue 001, 20 Mar 2014

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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.

Applicable To: B787-A-27-00-0021-00A-932A-D

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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

Reference Title

SB B787-A-27-00-0021-00A-932A-D Issue 001, References

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 

Part Number / QTY Name Existing Part Number Notes

Specification

Slat Skew Detection Mechanism P683A0001-03 *[1] *[2]

Assembly (DMA)

P683A0001-04 2

*[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.

Applicable To: B787-A-27-00-0021-00A-934A-D

Model 787 Issue 001, 20 Mar 2014

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C. Parts Modified and Reidentified:

Table 2 

Existing Part QTY Name New Part Number Notes

Number

145Z0201-11-8 1 Slat No. 5 145Z0201-15-1 *[1]

145Z0201-12-8 1 Slat No. 8 145Z0201-16-1

145Z0201-21-4 1 Slat No. 5 145Z0201-25-1

145Z0201-22-4 1 Slat No. 8 145Z0201-26-1

145Z0201-21-3 1 Slat No. 5 145Z0201-25-2

145Z0201-22-3 1 Slat No. 8 145Z0201-26-2

145Z0201-21-5 1 Slat No. 5 145Z0201-25-3

145Z0201-22-5 1 Slat No. 8 145Z0201-26-3

145Z0201-21-8 1 Slat No. 5 145Z0201-25-4

145Z0201-22-8 1 Slat No. 8 145Z0201-26-4

145Z0201-21-9 1 Slat No. 5 145Z0201-25-5

145Z0201-22-9 1 Slat No. 8 145Z0201-26-5

145Z0201-31-1 1 Slat No. 5 145Z0201-27-1

145Z0201-32-1 1 Slat No. 8 145Z0201-28-1

145Z0201-33-1 1 Slat No. 5 145Z0201-37-2

145Z0201-34-1 1 Slat No. 8 145Z0201-38-2

*[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 

Part Number Name QTY

2 Slat Skew Detection *[1]

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.

Applicable To: B787-A-27-00-0021-00A-934A-D

Model 787 Issue 001, 20 Mar 2014

See Applicability of this data module

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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.

Applicable To: B787-A-27-00-0021-00A-934A-D

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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

Reference Title

SB B787-A-27-00-0021-00A-932A-D Issue 001, References

Paragraph 10.

SB B787-A-27-00-0021-00A-932A-D Issue 001, Manpower

Paragraph 7.

SB B787-A-27-00-0021-00A-932A-D Issue 001, Compliance

Paragraph 5.

SWPM 20-10-11 Standard Wiring Practices Manual

SWPM 20-10-12 Standard Wiring Practices Manual

SWPM 20-10-19 Standard Wiring Practices Manual

SOPM 20-50-01 BOLT AND NUT INSTALLATION

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

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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 installation

standards 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.

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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 service

bulletin. 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 numbers

provided 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

Existing Part Number Name New Part Number

145Z0201-11-8 Slat No. 5 145Z0201-15-1

145Z0201-21-4 Slat No. 5 145Z0201-25-1

145Z0201-21-3 Slat No. 5 145Z0201-25-2

145Z0201-21-5 Slat No. 5 145Z0201-25-3

145Z0201-21-8 Slat No. 5 145Z0201-25-4

145Z0201-21-9 Slat No. 5 145Z0201-25-5

145Z0201-31-1 Slat No. 5 145Z0201-27-1

145Z0201-33-1 Slat No. 5 145Z0201-37-2

(4) Do the Outboard Leading Edge Slat Skew Lanyard - Functional Test. Refer to 787 AMM 27-89-04

as an accepted procedure.

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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 numbers

provided 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

Existing Part Number Name New Part Number

145Z0201-12-8 Slat No. 8 145Z0201-16-1

145Z0201-22-4 Slat No. 8 145Z0201-26-1

145Z0201-22-3 Slat No. 8 145Z0201-26-2

145Z0201-22-5 Slat No. 8 145Z0201-26-3

145Z0201-22-8 Slat No. 8 145Z0201-26-4

145Z0201-22-9 Slat No. 8 145Z0201-26-5

145Z0201-32-1 Slat No. 8 145Z0201-28-1

145Z0201-34-1 Slat No. 8 145Z0201-38-2

(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.

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