# Boeing Service Bulletin B787-81205-SB420045-00

Copy: Revision 002 ("B787-81205-SB420045-00, Issue 002"), 16 pages: PDF https://openairdocs.org/files/sha256/1c/3c/1c3c63643d1896ca1638f6d37bea64a026b4d568ed20500ce438a14d0f79cf7f; text https://openairdocs.org/service-documents/boeing/b787-81205-sb420045-00/file/1c3c63643d18.md. Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2020-0205; AD 2020-06-14 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Boeing](https://openairdocs.org/service-documents/boeing.md)
- Type: Service bulletin (Service Bulletin)
- Number: B787-81205-SB420045-00
- Latest revision known: B787-81205-SB420045-00, Issue 002, dated February 14, 2020 (OpenAirDocs)
- Page: https://openairdocs.org/service-documents/boeing/b787-81205-sb420045-00

## ADs that cite it (1) (OpenAirDocs)

Newest first, with the revision each names, as OpenAirDocs read it from the AD's text.

- [AD 2020-06-14](https://openairdocs.org/ad/2020-06-14.md), effective Apr 7, 2020: Revisions 001 and 002

## Text (16 pages)

Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2020-0205; AD 2020-06-14 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

Alert Service Bulletin B787-81205-SB420045-00 INTEGRATED MODULAR
AVIONICS - Common Core System - Time Manager Power Cycle Reset
Issue 002, 14 Feb 2020B787-81205-SB420045-00Publication:
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET
Copyright © 2020 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 Unpublished Work.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
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 controller of 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, 787-9, 787-10 Airplanes. Refer to Data Module SB B787-A-42-00-0045-00A-932A-D, Paragraph 1.,
Effectivity for the list of affected airplanes.
B787-81205-SB420045-00TITLE PAGE
Issue 002, 14 Feb 2020
Page 1 of 16
EXPORT CONTROLLED ECCN: 9E991
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details.
2.0
B787-81205-SB420045-00
Issue 002, 14 Feb 2020
AIRCRAFT SERVICE BULLETIN

### Page 2

Table of Contents
Page
Revision Transmittal Information  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PLANNING INFORMATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1. Effectivity  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
A. Airplanes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
B. Spares Affected  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2. Concurrent Requirements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3. Reason  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4. Description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5. Compliance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6. Approval  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7. Manpower  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8. Weight and Balance Changes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9. Electrical Load Data  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
10. References  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
A. Existing Data:  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
B. Data Supplied with this Service Bulletin:  . . . . . . . . . . . . . . . . . . . . . . . . . . 11
C. Installation Requirement Modules Used in the Preparation of this Service Bulletin:  . . . 11
11. Publications Affected  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
12. Interchangeability and Intermixability of Parts  . . . . . . . . . . . . . . . . . . . . . . . . . 12
13. Software Accomplishment Summary  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
MATERIAL INFORMATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1. Material - Price and Availability  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2. Industry Support Information  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3. Parts Necessary for Each Airplane  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
A. Kits/Parts:  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
B. Parts and Materials Supplied by the Operator:  . . . . . . . . . . . . . . . . . . . . . . . 13
C. Parts Modified and Reidentified:  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
D. Parts Removed and Not Replaced:  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4. Parts Necessary to Change Spares  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5. Special Tooling - Price and Availability  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6. Special Tooling Necessary to do this Service Bulletin  . . . . . . . . . . . . . . . . . . . . . 14
ACCOMPLISHMENT INSTRUCTIONS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1. GENERAL INFORMATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2. WORK INSTRUCTIONS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
B787-81205-SB420045-00TABLE OF CONTENTS
Issue 002, 14 Feb 2020
Page 2 of 16
EXPORT CONTROLLED ECCN: 9E991
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET. See title page for details.
B787-81205-SB420045-00
Issue 002, 14 Feb 2020
AIRCRAFT SERVICE BULLETIN

### Page 3

Alert Service Bulletin B787-81205-SB420045-00
List of Effective Data Modules
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN
IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND
Alert:
THIS DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD,
SEND THIS DOCUMENT TO THE NEW OWNER.
Description
Group 1:
Table 1  List of Effective Data Modules - Alert Service Bulletin B787-81205-SB420045-00
Issue DateIssue StatusIssueData Module – Information Name
2020-02-14Changed002B787-A-42-00-0045-00A-00SA-D – List of Effective Data Modules
2020-02-14New001B787-A-42-00-0045-00A-931B-D – Revision Transmittal Information
2020-02-14Changed002B787-A-42-00-0045-00A-932A-D – PLANNING INFORMATION
2020-02-14Changed002B787-A-42-00-0045-00A-934A-D – MATERIAL INFORMATION
2020-02-14Changed002B787-A-42-00-0045-00A-933A-D – ACCOMPLISHMENT INSTRUCTIONS
B787-A-42-00-0045-00A-00SA-DApplicable To:
Issue 002, 14 Feb 2020End of data moduleModel 787
See Applicability of this data module
Page 3 of 16
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B787-81205-SB420045-00
Issue 002, 14 Feb 2020
AIRCRAFT SERVICE BULLETIN

### Page 4

Alert Service Bulletin B787-81205-SB420045-00
Revision Transmittal Information
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN
IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND
Alert:
THIS DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD,
SEND THIS DOCUMENT TO THE NEW OWNER.
References
TitleReference
EffectivitySB B787-A-42-00-0045-00A-932A-D Issue 002,
Paragraph 1.
ComplianceSB B787-A-42-00-0045-00A-932A-D Issue 002,
Paragraph 5.
ReasonSB B787-A-42-00-0045-00A-932A-D Issue 002,
Paragraph 3.
Existing DataSB B787-A-42-00-0045-00A-932A-D Issue 002,
Paragraph 10.A.
Work InstructionsSB B787-A-42-00-0045-00A-933A-D Issue 002, Step 2.
AirplanesSB B787-A-42-00-0045-00A-932A-D Issue 002,
Paragraph 1.A.
Description
Group 1:
This revision includes all pages of the service bulletin.
1. COMPLIANCE INFORMATION RELATED TO THIS REVISION
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.
Effects of this revision on Airplanes on which SB B787-81205-SB420045-00 Issue 001 was previsouly done:
None
2. REASON FOR REVISION
This Issue is sent to clarify the compliance requirements and work instructions.
These sections were changed:
B787-A-42-00-0045-00A-931B-DApplicable To:
Issue 001, 14 Feb 2020Model 787
See Applicability of this data module
Page 4 of 16
EXPORT CONTROLLED ECCN: 9E991
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B787-81205-SB420045-00
Issue 002, 14 Feb 2020
AIRCRAFT SERVICE BULLETIN

### Page 5

1. Data Module SB B787-A-42-00-0045-00A-932A-D, Paragraph 1., Effectivity - Updated Effectivity paragraph
to clarify open ended airplane line number and variable number effectivity and applicability statements.
2. Data Module SB B787-A-42-00-0045-00A-932A-D, Paragraph 5., Compliance - Updated compliance
table.
3. Data Module SB B787-A-42-00-0045-00A-932A-D, Paragraph 3., Reason - Removed Multi-Operator
Message (MOM) reference.
4. Data Module SB B787-A-42-00-0045-00A-932A-D, Paragraph 10.A., Existing Data - Removed Multi-
Operator Message (MOM) reference.
5. Data Module SB B787-A-42-00-0045-00A-933A-D, Step 2., Work Instructions - Updated work instructions
to clarify the steps.
Footnotes in tables may be renumbered if footnotes are moved, added or deleted. Change marks will only
be added at locations where changes were made to the content; Footnotes that were only renumbered will
not have change marks added.
Change marks are added, except in Data Module SB B787-A-42-00-0045-00A-932A-D, Paragraph 1.A.,
Airplanes and format changes, to show the location of all content changes.
3. REVISION HISTORY
Table 1  
January 28, 2020Issue 1:
February 14, 2020Issue 2:
B787-A-42-00-0045-00A-931B-DApplicable To:
Issue 001, 14 Feb 2020End of data moduleModel 787
See Applicability of this data module
Page 5 of 16
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B787-81205-SB420045-00
Issue 002, 14 Feb 2020
AIRCRAFT SERVICE BULLETIN

### Page 6

Alert Service Bulletin B787-81205-SB420045-00
PLANNING INFORMATION
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN
IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND
Alert:
THIS DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD,
SEND THIS DOCUMENT TO THE NEW OWNER.
References
TitleReference
Parts Necessary for Each AirplaneSB B787-A-42-00-0045-00A-934A-D Issue 002,
Paragraph 3.
AC GENERATION AND BUS CONTROL787 AMM 24-22-00
Description
Group 1:
1. Effectivity
A. Airplanes
This bulletin is applicable to 787-8, 787-9, 787-10 Airplane(s), line number(s) 6-1106, 1109, 1119-1131, 1135
in 1 Group(s). Where the effectivity is presented with hyphens between line numbers, the airplane applicabil-
ity means "through" and "inclusive", e.g. line numbers 1-9 means line numbers 1 through 9 inclusive.
The Effectivity of this service bulletin is open ended and includes all 787-8, 787-9, 787-10 Airplanes. Affected
airplane line numbers not shown will be added to the effectivity as the later line numbers/Variable Numbers
are added to Maintenance Performance Toolbox.
The Variable Numbers and Group information for the applicable airplanes is given below. Refer to CN-
AA83560C for data about this change.
NOTE: The Variable Number table below includes all affected airplanes up to Line Number 1135. Affected
airplanes after Line Number 1135 will show up as available as they are added to Maintenance Per-
formance Toolbox. 
Table 1  
DESCRIPTIONCONFIGURATIONGROUP
All 787-8, 787-9 and 787-10 Airplanes requiring power cycling.-1
Airplane Models: 787-10, 787-8, 787-9
Table 2
B787-A-42-00-0045-00A-932A-DApplicable To:
Issue 002, 14 Feb 2020Model 787
See Applicability of this data module
Page 6 of 16
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Issue 002, 14 Feb 2020
AIRCRAFT SERVICE BULLETIN

### Page 7

GroupVariable Number
1ZA006
1ZA100-ZA105
1ZA116-ZA124
1ZA135-ZA144
1ZA152-ZA156
1ZA175-ZA189
1ZA195-ZA204
1ZA215-ZA225
1ZA230-ZA256
1ZA260-ZA277
1ZA285-ZA296
1ZA317-ZA324
1ZA327
1ZA334-ZA335
1ZA341-ZA342
1ZA380-ZA389
1ZA430-ZA439
1ZA445-ZA489
1ZA506-ZA516
1ZA536-ZA545
1ZA560-ZA567
1ZA576-ZA580
1ZA586
1ZA588-ZA593
1ZA610-ZA617
1ZA650-ZA652
1ZA655-ZA663
1ZA665-ZA677
1ZA680-ZA685
1ZA695-ZA698
1ZA715-ZA716
GroupVariable Number
1ZA718-ZA719
1ZA740-ZA741
1ZA768-ZA769
1ZA778-ZA779
1ZA783-ZA784
1ZA817-ZA831
1ZA839
1ZA841-ZA842
1ZA846-ZA848
1ZA853-ZA863
1ZA873-ZA876
1ZA881-ZA888
1ZA916-ZA920
1ZA949-ZA950
1ZA954-ZA959
1ZA963-ZA966
1ZA968-ZA972
1ZA990
1ZB001-ZB012
1ZB021-ZB043
1ZB047-ZB061
1ZB077-ZB081
1ZB097-ZB121
1ZB127-ZB136
1ZB167-ZB191
1ZB197-ZB198
1ZB217
1ZB219-ZB220
1ZB224-ZB229
1ZB234-ZB242
1ZB246-ZB248
GroupVariable Number
1ZB251-ZB258
1ZB261-ZB262
1ZB265-ZB282
1ZB299
1ZB302-ZB305
1ZB332-ZB338
1ZB362-ZB379
1ZB407-ZB435
1ZB446-ZB467
1ZB536-ZB543
1ZB545-ZB547
1ZB558-ZB586
1ZB603-ZB618
1ZB646-ZB649
1ZB656-ZB669
1ZB676-ZB681
1ZB688-ZB707
1ZB733-ZB735
1ZB738-ZB740
1ZB742-ZB745
1ZB749-ZB751
1ZB753-ZB757
1ZB763-ZB769
1ZB771-ZB775
1ZB778-ZB821
1ZB828-ZB845
1ZB858-ZB863
1ZB874-ZB876
1ZB887
1ZB890
1ZB893-ZB922
B787-A-42-00-0045-00A-932A-DApplicable To:
Issue 002, 14 Feb 2020Model 787
See Applicability of this data module
Page 7 of 16
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B787-81205-SB420045-00
Issue 002, 14 Feb 2020
AIRCRAFT SERVICE BULLETIN
Table 2

### Page 8

GroupVariable Number
1ZB924
1ZB926-ZB927
1ZB934-ZB952
1ZB967-ZB971
1ZB977-ZB991
1ZB993-ZB997
1ZC001-ZC020
1ZC036-ZC048
1ZC061-ZC070
1ZC101-ZC106
1ZC116-ZC118
1ZC126-ZC129
1ZC151-ZC152
1ZC155-ZC162
1ZC211-ZC219
1ZC221-ZC227
1ZC236-ZC238
1ZD001-ZD009
1ZD012-ZD024
1ZD027
GroupVariable Number
1ZD038
1ZD048
1ZE001-ZE010
1ZE013-ZE014
1ZE016-ZE017
1ZE019
1ZE031-ZE032
1ZE040-ZE045
1ZE048
1ZE075
1ZE085-ZE086
1ZE090-ZE091
1ZE095-ZE096
1ZE100
1ZE105-ZE107
1ZE110
1ZE115
1ZE150
1ZE165-ZE166
1ZE170-ZE171
GroupVariable Number
1ZE195-ZE198
1ZE220-ZE234
1ZE236-ZE237
1ZE270-ZE273
1ZE310-ZE315
1ZE340-ZE341
1ZE350-ZE362
1ZE375
1ZE380-ZE381
1ZE383-ZE384
1ZE415-ZE418
1ZE425-ZE428
1ZE435-ZE438
1ZE455-ZE456
1ZE481
1ZE486-ZE488
1ZE576-ZE577
1ZE586
--
--
B. Spares Affected
None.
2. Concurrent Requirements
None.
3. Reason
This service bulletin is sent to provide operators with airplane power cycling instructions to prevent possible
loss of stale data monitoring function of Common Core System (CCS) when the airplane is powered con-
tinuously for an extended amount of time. If the changes in this service bulletin are not done, undetect-
ed/unannunciated loss of Common Data Network (CDN) message age validation, combined with a CDN
switch failure, could lead to erroneous flight critical data being routed and displayed as valid data, which
could lead to potential inability for the flight crew to maintain Continued Safe Flight and Landing (CSFL).
B787-A-42-00-0045-00A-932A-DApplicable To:
Issue 002, 14 Feb 2020Model 787
See Applicability of this data module
Page 8 of 16
EXPORT CONTROLLED ECCN: 9E991
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B787-81205-SB420045-00
Issue 002, 14 Feb 2020
AIRCRAFT SERVICE BULLETIN
Table 2

### Page 9

Boeing analysis and testing has identified a potential condition in which the Error Detection Encoding (EDE)
age validation will become disabled without detection after approximately 51 days of continuous airplane
electrical power application.
Undetected and/or unannunciated loss of CDN message age validation combined with a network switch
failure could lead to stale data being consumed by airplane systems on the network, although no system
level effects have been reported in service and analysis shows the probability of the undetected switch
failure to be "Extremely Remote."
A single network switch failure, combined with 51 days of continuous airplane electrical power application,
has been identified to be a potential scenario in which critical data may be adversely affected. While this
scenario is highly unlikely in the fleet, Boeing has identified airplane power cycling requirements to eliminate
the possibility of these two items happening concurrently.
Boeing Service Related Problem (SRP) 787 42-0013 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 787-FTD-42-20001 is related to this service bulletin.
Issue 002 is sent to clarify compliance requirements and work instructions.
4. Description
Airplane Electrical Power Cycle: Do Deactivate Airplane Electrical Power, Activate Airplane Electrical
Power and repeat Deactivate Airplane Electrical Power at specified interval.
Effects of this revision on Airplanes on which SB B787-81205-SB420045-00 Issue 001 was previously
done:
None.
The work in this service bulletin is done in the maintenance zone(s) given below.
Table 3  
Affected Maintenance Zones
ZoneModel
211, 212787-10, 787-8, 787-9
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.
Accomplish the required action, based on the applicable condition in Table 4 in accordance with the Accom-
plishment Instructions.
B787-A-42-00-0045-00A-932A-DApplicable To:
Issue 002, 14 Feb 2020Model 787
See Applicability of this data module
Page 9 of 16
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Issue 002, 14 Feb 2020
AIRCRAFT SERVICE BULLETIN

### Page 10

Table 4  Deactivate Airplane Electrical Power
Repeat Interval
(Not to Exceed)
Compliance TimeActionCondition
25 daysWithin 3 days after
the Issue 2 date of
this service bulletin
Do PART 1: Deactivate
Airplane Electrical Power
Airplanes with electrical
power applied for 37 or
more consecutive days or
airplanes whose power
history cannot be deter-
mined as of the Issue 2
date of this service bulletin
25 daysWithin 14 days af-
ter the Issue 2 date
of this service bul-
letin
Do PART 1: Deactivate
Airplane Electrical Power
Airplanes with electrical
power applied for 25 or
more but less than 37
consecutive days as of the
Issue 2 date of this service
bulletin
25 daysWithin 25 days af-
ter the Issue 2 date
of this service bul-
letin.
Do PART 1: Deactivate
Airplane Electrical Power
Airplanes with electrical
power applied for less than
25 consecutive days as of
the Issue 2 date of this
service bulletin
25 daysWithin 24 days af-
ter the date of the
original airworthi-
ness certificate or
original export cer-
tificate of airworthi-
ness
Do PART 1: Deactivate
Airplane Electrical Power
Airplanes with an original
airworthiness certificate or
original export certificate
of airworthiness dated on
or after the Issue 2 date of
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 air-
planes 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
The table below shows an estimate of the task hours necessary to do this change for each airplane. This
estimate is for direct labor only, done by an experienced crew. Adjust the estimate with operator task hour
data if necessary. The estimate does not include lost time. These are some examples of lost time:
B787-A-42-00-0045-00A-932A-DApplicable To:
Issue 002, 14 Feb 2020Model 787
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AIRCRAFT SERVICE BULLETIN

### Page 11

– Time to adjust to the workplace
– Time to schedule the work
– Time to inspect the work
– Time to cure the materials
– Time to make the parts
– Time to find the tools
Table 5  Airplane Electrical Power Cycle
Elapsed HoursTask HoursNumber of Per-
sons
Task
0.60.61Airplane Electrical
Power Cycle
0.60.6TOTAL FOR EACH AIRPLANE
8. Weight and Balance Changes
None.
9. Electrical Load Data
Not changed.
10. References
A. Existing Data:
1. Change Notice CN-AA83560C
2. Aircraft Maintenance Manual (AMM) 787 AMM 24-22-00
3. Boeing Fleet Team Digest (FTD) 787-FTD-42-20001
4. Boeing Service Related Problem (SRP) 787 42-0013
B. Data Supplied with this Service Bulletin:
None.
C. Installation Requirement Modules Used in the Preparation of this Service Bulletin:
None.
11. Publications Affected
None.
Damage Tolerance Based Structural Inspections:
Boeing has evaluated the repairs 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-42-00-0045-00A-932A-DApplicable To:
Issue 002, 14 Feb 2020Model 787
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12. Interchangeability and Intermixability of Parts
Refer to Data Module SB B787-A-42-00-0045-00A-934A-D, Paragraph 3., Parts Necessary for Each Airplane,
for interchangeability and intermixability information.
13. Software Accomplishment Summary
1. System affected by this change: None.
2. Software changes which affect operational procedures: None.
3. Other software improvements: None.
B787-A-42-00-0045-00A-932A-DApplicable To:
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Alert Service Bulletin B787-81205-SB420045-00
MATERIAL INFORMATION
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN
IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND
Alert:
THIS DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD,
SEND THIS DOCUMENT TO THE NEW OWNER.
References
TitleReference
ReferencesSB B787-A-42-00-0045-00A-932A-D Issue 002,
Paragraph 10.
Description
Group 1:
1. Material - Price and Availability
None.
2. Industry Support Information
Boeing warranty remedies are not available for the suggestions and/or information given in this service
bulletin.
3. Parts Necessary for Each Airplane
A. Kits/Parts:
None.
B. Parts and Materials Supplied by the Operator:
None.
C. Parts Modified and Reidentified:
None.
D. Parts Removed and Not Replaced:
None.
4. Parts Necessary to Change Spares
None.
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### Page 14

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-42-00-0045-00A-932A-D, Paragraph 10.,
References, can be necessary. Examine operator tool supply to make sure all necessary tools are available.
B787-A-42-00-0045-00A-934A-DApplicable To:
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### Page 15

Alert Service Bulletin B787-81205-SB420045-00
ACCOMPLISHMENT INSTRUCTIONS
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN
IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND
Alert:
THIS DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD,
SEND THIS DOCUMENT TO THE NEW OWNER.
References
TitleReference
ReferencesSB B787-A-42-00-0045-00A-932A-D Issue 002,
Paragraph 10.
ComplianceSB B787-A-42-00-0045-00A-932A-D Issue 002,
Paragraph 5.
AC GENERATION AND BUS CONTROL787 AMM 24-22-00
Procedure
Group 1:
1. GENERAL INFORMATION
NOTE: 1. Manual titles are referred to by acronyms. Refer to Data Module SB B787-A-42-00-0045-00A-
932A-D, Paragraph 10., References, for definition of the acronyms.
2. Obey all of the warnings and cautions given in the specified manual sections.
3. 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.
4. The compliance times for the actions in Step 2., Work Instructions are in Data Module SB B787-
A-42-00-0045-00A-932A-D, Paragraph 5., Compliance.
5. Some steps in the Work Instructions are labeled as Required for Compliance (RC). If this service
bulletin is mandated by an Airworthiness Directive (AD), then the steps labeled as RC, including
sub-steps under an RC step and any figures identified in an RC step, must be done to comply
with the AD. If a step or sub-step is labeled "RC Exempt," then the RC requirement is removed
from that step or sub-step. An Alternative Method of Compliance (AMOC) is required for any
deviations to RC steps, including sub-steps and identified figures. Steps not labeled as RC may
be deviated from using accepted methods in accordance with the operator's maintenance or
inspection program without obtaining approval of an AMOC. This is provided that the RC steps,
including sub-steps and identified figures, can still be done as specified, and the airplane can
be put back in an airworthy condition.
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Issue 002, 14 Feb 2020Model 787
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### Page 16

2. WORK INSTRUCTIONS
A. AIRPLANE ELECTRICAL POWER CYCLE
RC - Do PART 1: Deactivate Airplane Electrical Power(1)
PART 1: Deactivate Airplane Electrical Power
(a) Do Electrical Power Deactivation. Refer to 787 AMM 24-22-00 Electrical Power (Task
Selection) - Deactivation as accepted procedures.
(b) Wait a minimum of five minutes.
(2) Do Electrical Power Activation. Refer to 787 AMM 24-22-00 Electrical Power (Task Selection) - Ac-
tivation as accepted procedures.
(3) Put the airplane back to a serviceable condition.
B787-A-42-00-0045-00A-933A-DApplicable To:
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