Commercial 

Airplanes 777

Service Bulletin

SPECIAL ATTENTION

Number: 777-31-0187

Original Issue: November 29, 2012

ATA System: 3161

SUBJECT: INDICATING/RECORDING SYSTEMS - Primary Display System - Display Unit

Replacement and Software Change

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

BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET

Copyright © 2012 Boeing.

Unpublished Work. All Rights Reserved.

Treatment of this document and its content is governed by contract with Boeing. Rights to use this document

are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The

Boeing Company.

Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, DreamlinerTM,

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BLANK PAGE
Table of Contents

Summary ...................................................... 5

1. PLANNING INFORMATION ........................................ 9

A. Effectivity ................................................ 9

1. Airplanes ............................................. 9

2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

E. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2. Data Supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . . 17

K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

M. Software Accomplishment Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

A. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

C. Parts Necessary for Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2. Parts and Materials Supplied by the Operator . . . . . . . . . . . . . . . . . . . . . . . . 19

3. Parts Modified and Reidentified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4. Parts Removed and Not Replaced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 20

3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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BOEING SERVICE BULLETIN 777-31-0187

BLANK PAGE
Commercial 

Airplanes 777

Service Bulletin

SPECIAL ATTENTION

Summary Number: 777-31-0187

Original Issue: November 29, 2012

ATA System: 3161

SUBJECT: INDICATING/RECORDING SYSTEMS - Primary Display System - Display Unit

Replacement and Software Change

BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY.

CONCURRENT REQUIREMENTS

None.

BACKGROUND

This service bulletin gives instructions to replace the existing Phase 3 Display Units (DU)s with new Phase 3A

DUs and install new DU database (DB) software. If this change is not done, the DUs will remain susceptible to

High Intensity Radiated Field (HIRF) emissions. This could cause loss of data on the screen or cause the screen

to flicker which could result in intermittent indications in the flight deck.

It was reported that during the Electromagnetic Interference (EMI) certification test procedures of the wireless

broadband systems, the existing Phase 3 DUs were susceptible to HIRF emissions at field intensities below the

necessary HIRF Qualification Test levels. This problem caused the DU to flicker or the data on the DU screen

to go out of view temporarily. The new Phase 3A DU reduces its susceptibility to HIRF emissions and also

incorporates a product improvement to increase the video brightness level of the lower grey shades.

The new DU DB software allows the usage of the latest Phase 3A DU. Without this software update, operators

will not be able to use the Phase 3A DU. Operators are advised to install the new DU DB software because it

will work with the latest DU and all previous versions of the DUs. This will help in the situation where an operator

uses both old and new DUs.

Boeing Service Related Problem (SRP) 777-SRP-31-0048 is related to this service bulletin.

More data about this change is in Service Letter 777-SL-31-038.

This table is provided to operators for planning purposes only. Refer to the applicable sections for more

information.

Planning Data Affected Reference

Spares Affected Yes Paragraph 1.A.2., Spares Affected

AD Related Yes Paragraph 1.E., Compliance

Weight and Balance Change No Paragraph 1.H., Weight and Balance Changes

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Planning Data Affected Reference

Electrical Load Changed No Paragraph 1.I., Electrical Load Data

Publications Affected Yes Paragraph 1.K., Publications Affected

Airplane Flight Operations Affected (Flight Crew No Paragraph 1.K., Publications Affected

Operations Manual and/or FAA Approved Airplane Flight Manual)

Kits/Parts Required No Paragraph 2.C.1., Kits/Parts

Paragraph 2.C.2., Parts and Materials Supplied

by the Operator

Operator Supplied Material Yes

Paragraph 2.F., Special Tooling Necessary to

do this Service Bulletin

Special Tooling Required No

ACTION (PRR 62777-82S)

Work Package 1 - Software Installation:

Install the DU DB software into the left and right Airplane Information Management System (AIMS) Core Processor

Module/Graphics Generator (CPM/GG).

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

Work Package 2 - Display Unit Replacement:

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

In the flight compartment, in the forward instrument panel, replace the existing non-video Phase 3 DUs with new

non-video Phase 3A DUs.

Group 1, Configuration 1; Group 2, Configuration 2:

In the flight compartment, in the forward instrument panel, replace the existing video Phase 3 DUs with new

video Phase 3A DUs.

EFFECTIVITY

777-200/200LR/300/300ER, 777F Airplane(s). Refer to Paragraph 1.A.1., Airplanes, for the list of affected

airplane(s).

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.

Boeing recommends that the change given in this service bulletin be done within 60 months after the original

issue date of this service bulletin.

INDUSTRY SUPPORT INFORMATION

Boeing warranty remedies are not available for the configuration changes given in this service bulletin.

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BOEING SERVICE BULLETIN 777-31-0187
MANPOWER

Refer to Paragraph 1.G., Manpower.

MATERIAL INFORMATION

Operator Supplied Parts/Materials.

Refer to Paragraph 2.A., Material - Price and Availability.

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BLANK PAGE
Commercial 

Airplanes 777

Service Bulletin

SPECIAL ATTENTION

Number: 777-31-0187

Original Issue: November 29, 2012

ATA System: 3161

SUBJECT: INDICATING/RECORDING SYSTEMS - Primary Display System - Display Unit

Replacement and Software Change

BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY.

1. PLANNING INFORMATION

A. Effectivity

1. Airplanes

Refer to Service Bulletin Index D624W001 Part 3 for Airplane Variable Number, Line Number, and

Serial Number data.

This service bulletin is for the airplane(s) shown below. An equivalent change is on subsequent

production airplanes. Refer to PRR 62777-82S for data about this change.

GROUP CONFIGURATION DESCRIPTION

1 - 777-300 and 777-300ER airplanes.

1 Airplanes with the three non-video and three video Phase 3 DUs.

2 Airplanes without the Phase 3 DUs.

2 - 777-200, 777-200LR and 777F airplanes.

1 Airplanes with the six non-video Phase 3 DUs.

2 Airplanes with the three non-video and three video Phase 3 DUs.

3 Airplanes without the Phase 3 DUs.

Airplane Models:

777-200, 777-200LR, 777-300, 777-300ER, 777F

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Variable Number Group

WA001 - WA017 2

WA076 - WA080 2

WA086 - WA093 2

WA101 - WA104 2

WA116 - WA119 2

WA131 - WA137 2

WA171 - WA175 2

WA196 - WA198 2

WA206 - WA212 2

WA221 - WA223 2

WA231 - WA232 2

WA241 - WA250 2

WA261 - WA266 2

WA281 - WA283 2

WA301 - WA304 2

WB001 - WB021 2

WB031 - WB046 2

WB051 - WB088 2

WB101 - WB106 2

WB121 - WB125 2

WB131 - WB148 2

WB151 - WB155 2

WB161 - WB177 2

WB181 - WB194 2

WB201 - WB215 2

WB231 - WB247 2

WB271 - WB273 2

WB276 - WB286 2

WB291 - WB302 2

WB306 - WB307 2

WB311 - WB337 2

WB341 - WB342 2

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BOEING SERVICE BULLETIN 777-31-0187
Variable Number Group

WB366 - WB368 2

WB371 - WB388 2

WB406 2

WB411 - WB413 2

WB416 - WB439 2

WB446 - WB453 2

WB476 2

WB481 - WB484 2

WB501 - WB512 1

WB531 - WB537 1

WB551 - WB554 1

WB591 - WB597 1

WB601 - WB606 1

WB611 - WB622 1

WB631 - WB638 1

WB646 - WB649 1

WC051 - WC073 2

WC101 - WC104 2

WC111 - WC120 2

WC221 - WC224 2

WC241 - WC243 2

WC281 - WC290 2

WC301 - WC308 2

WC361 - WC364 2

WC371 - WC374 2

WC381 - WC395 2

WC441 2

WC446 - WC449 2

WC456 - WC459 2

WC486 - WC493 2

WC506 - WC508 2

WC521 - WC522 2

WC531 - WC536 2

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BOEING SERVICE BULLETIN 777-31-0187
Variable Number Group

WC546 - WC548 2

WC556 2

WC566 - WC567 2

WC571 - WC574 2

WC581 2

WC586 2

WC591 - WC592 2

WD001 - WD002 2

WD011 - WD018 2

WD031 - WD036 2

WD046 - WD055 2

WD066 - WD075 2

WD081 - WD089 2

WD091 2

WD096 2

WD101 - WD105 2

WD111 2

WD116 - WD117 2

WD501 - WD513 1

WD521 - WD541 1

WD546 - WD554 1

WD561 - WD573 1

WD581 - WD599 1

WD606 - WD609 1

WD621 - WD632 1

WD651 - WD665 1

WD671 - WD677 1

WD691 - WD709 1

WD741 - WD752 1

WD761 - WD771 1

WD786 - WD788 1

WD796 - WD819 1

WD826 - WD837 1

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BOEING SERVICE BULLETIN 777-31-0187
Variable Number Group

WD846 - WD867 1

WD871 - WD888 1

WD911 - WD917 1

WD921 - WD923 1

WD936 - WD941 1

WD946 - WD955 1

WD966 - WD970 1

WD981 - WD982 1

WD986 - WD987 1

WD991 1

WD996 1

WE001 - WE004 1

WE011 - WE012 1

WE021 - WE026 1

WE031 - WE034 1

WE051 - WE055 1

WE071 - WE072 1

WE081 - WE084 1

WE091 - WE093 1

WE126 - WE137 1

WE151 - WE159 1

WE176 - WE177 1

WE186 - WE204 1

WE216 - WE217 1

WE226 - WE230 1

WE236 - WE240 1

WE251 - WE253 1

WE261 1

WE271 1

WF001 - WF004 2

WF016 - WF021 2

WF031 - WF035 2

WF046 - WF062 2

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BOEING SERVICE BULLETIN 777-31-0187
Variable Number Group

WF075 - WF077 2

WF081 - WF088 2

WF096 - WF101 2

WF106 - WF109 2

WF111 - WF114 2

WF121 - WF124 2

WF131 2

WF136 - WF137 2

WF146 2

WF151 2

2. Spares Affected

Examine your spares supply for the parts or components identified below. If any parts or components

are found, refer to Paragraph 3.B., Work Instructions for the recommended action.

Part Number

4091900-931

4091900-933

B. Concurrent Requirements

None.

C. Reason

This service bulletin gives instructions to replace the existing Phase 3 Display Units (DU)s with new

Phase 3A DUs and install new DU database (DB) software. If this change is not done, the DUs will

remain susceptible to High Intensity Radiated Field (HIRF) emissions. This could cause loss of data

on the screen or cause the screen to flicker which could result in intermittent indications in the flight

deck.

It was reported that during the Electromagnetic Interference (EMI) certification test procedures of the

wireless broadband systems, the existing Phase 3 DUs were susceptible to HIRF emissions at field

intensities below the necessary HIRF Qualification Test levels. This problem caused the DU to flicker

or the data on the DU screen to go out of view temporarily. The new Phase 3A DU reduces its

susceptibility to HIRF emissions and also incorporates a product improvement to increase the video

brightness level of the lower grey shades.

The new DU DB software allows the usage of the latest Phase 3A DU. Without this software update,

operators will not be able to use the Phase 3A DU. Operators are advised to install the new DU DB

software because it will work with the latest DU and all previous versions of the DUs. This will help in

the situation where an operator uses both old and new DUs.

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BOEING SERVICE BULLETIN 777-31-0187
Boeing Service Related Problem (SRP) 777-SRP-31-0048 is related to this service bulletin.

More data about this change is in Service Letter 777-SL-31-038.

D. Description

Work Package 1 - Software Installation:

Install the DU DB software into the left and right Airplane Information Management System (AIMS)

Core Processor Module/Graphics Generator (CPM/GG).

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

Work Package 2 - Display Unit Replacement:

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

In the flight compartment, in the forward instrument panel, replace the existing non-video Phase 3 DUs

with new non-video Phase 3A DUs.

Group 1, Configuration 1; Group 2, Configuration 2:

In the flight compartment, in the forward instrument panel, replace the existing video Phase 3 DUs with

new video Phase 3A DUs.

The work in this service bulletin is done in the maintenance zone(s) given below.

Group 1:

Affected Maintenance Zones

Model Zone

777-300, 777-300ER 211, 212

Group 2:

Affected Maintenance Zones

Model Zone

777-200, 777-200LR, 777F 211, 212

E. 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.

Boeing recommends that the change given in this service bulletin be done within 60 months after the

original issue date of this service bulletin.

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BOEING SERVICE BULLETIN 777-31-0187
F. 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.

G. Manpower

Work Package 1 can be done before or at the same time as Work Package 2, but Work Package 2

cannot be done before Work Package 1.

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:

• 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.

Work Package 1 - Software Installation

Task Number of Persons Task Hours Elapsed Hours

Software Installation 1 1.00 1.00

TOTAL FOR EACH AIRPLANE 1.00 1.00

This estimate gives general service bulletin incorporation time. The specific software data transfer times

can be found in 777 AMM 20-15-11.

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

Work Package 2 - Display Unit Replacement

Task Number of Persons Task Hours Elapsed Hours

Open Access 1 0.25 0.25

Display Unit Replacement 1 0.50 0.50

Close Access 1 0.50 0.50

Test 1 0.40 0.40

TOTAL FOR EACH AIRPLANE 1.65 1.65

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BOEING SERVICE BULLETIN 777-31-0187
The time to make the change to the DUs in accordance with Honeywell SB 4091900-31-0002 Service

Bulletin is not included.

H. Weight and Balance Changes

None.

I. Electrical Load Data

Not changed.

J. References

1. Existing Data:

a. Engineering Change Memo PRR 62777-82S

b. Boeing Service Letter 777-SL-31-038

c. Boeing Service Related Problem (SRP) 777-SRP-31-0048

d. Service Bulletin Index D624W001

e. 777 Aircraft Maintenance Manual (AMM) 20-15-11, 31-41-02, 31-61-01, 45-10-00

f. Honeywell Service Bulletin Honeywell SB 4091900-31-0002

NOTE: The supplier was told to send copies of the service bulletin to each operator.

2. Data Supplied with this Service Bulletin:

None.

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

Drawing Number Title

233W2101 Panel Arrangement Forward

The table above lists applicable drawings used to prepare this service bulletin. The drawings are

not necessary to make the specified changes, and are not supplied with this service bulletin. The

drawings may not be applicable to all airplane configurations or operators.

K. Publications Affected

1. Publications:

Publication Chapter-Section

777 Aircraft Maintenance Manual 31-61

777 Wiring Diagram Manual Equipment List

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BOEING SERVICE BULLETIN 777-31-0187
Publication Chapter-Section

777 Illustrated Parts Catalog 31-61, 46-00, 46-01

2. 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.

L. Interchangeability and Intermixability of Parts

Refer to Paragraph 2.C., Parts Necessary for Each Airplane, for interchangeability and intermixability

information.

M. Software Accomplishment Summary

1. System affected by this change: Primary Display System Display Units

2. Software changes which affect operational procedures: None.

3. Other software improvements:

– The video brightness table is loaded into the firmware for the DU to address a customer

satisfaction issue with the DU video contrast when switching back and forth between the

Ground Maneuver Camera System (GMCS) and the Navigation Display (ND) format during

ambient lighting conditions.

– A voltage value in a data table for the Airplane Information Management System (AIMS)

Graphics Generator (GG) is changed to allow the DU to better handle a HIRF situation.

More data about this change is in Service Letter 777-SL-31-038.

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BOEING SERVICE BULLETIN 777-31-0187
2. MATERIAL INFORMATION

A. Material - Price and Availability

The operator can supply the parts and materials shown in Paragraph 2.C., Parts Necessary for Each

Airplane. As an alternative, operators can purchase the parts from Boeing Spares. This service bulletin

does not show the Boeing price and supply data.

B. Industry Support Information

Boeing warranty remedies are not available for the configuration changes given in this service bulletin.

C. Parts Necessary for Each Airplane

1. Kits/Parts

None.

2. Parts and Materials Supplied by the Operator

Hardware

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

No hardware parts are necessary.

Group 1, Configuration 1; Group 2, Configuration 2:

Part Number / QTY Name Existing Part Number Notes

Specification

4091900-941 3 Display Unit 4091900-931 (a) (b) (c)

4091900-943 3 Display Unit (Video) 4091900-933 (a) (b) (c)

(a) This part is used in production.

(b) You can get the new part by reworking the existing part in accordance with Honeywell SB 4091900-31-

0002 Service Bulletin.

(c) The Display Unit can be obtained directly from the supplier: Honeywell Air Transport Systems (V58960),

21111 North 19th Avenue, Phoenix, Arizona 85027, USA.

Group 2, Configuration 1:

Part Number / QTY Name Existing Part Number Notes

Specification

4091900-941 6 Display Unit 4091900-931 (a) (b) (c)

(a) This part is used in production.

(b) You can get the new part by reworking the existing part in accordance with Honeywell SB 4091900-31-

0002 Service Bulletin.

(c) The Display Unit can be obtained directly from the supplier: Honeywell Air Transport Systems (V58960),

21111 North 19th Avenue, Phoenix, Arizona 85027, USA.

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Software

Media Set Part Num- Media Set Name Software Part Number Software Name Notes

ber

(a) (b) (c)

(d)

PS4077999-904 31 DU DB 3106-HNP-01W-04 DU DB

(a) This software part number is used in production. Operators may already have this media set.

(b) Do not install previous versions of this software after installation of the new software part number.

(c) Do not mix different part numbers of this software on the airplane. All CPM/GGs must contain the new

software.

(d) The media set can be obtained directly from the supplier: Honeywell Air Transport Systems (V58960),

21111 North 19th Avenue, Phoenix, Arizona 85027, USA

3. Parts Modified and Reidentified

None.

4. Parts Removed and Not Replaced

None.

D. Parts Necessary to Change Spares

None.

E. Special Tooling - Price and Availability

None.

F. 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 Paragraph 1.J., References, can be necessary. Examine

operator tool supply to make sure all necessary tools are available.

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BOEING SERVICE BULLETIN 777-31-0187
3. ACCOMPLISHMENT INSTRUCTIONS

A. GENERAL INFORMATION

CAUTION: KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF METAL

PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED MATERIAL,

METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE BUNDLES CAN CAUSE

DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES CAN CAUSE SPARKS OR

OTHER ELECTRICAL DAMAGE.

NOTE: 1. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., 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 Paragraph 1.G., Manpower. Work Package 1 can be

done before or at the same time as Work Package 2, but Work Package 2 cannot

be done before Work Package 1.

4. These work instructions refer to procedures included in other Boeing documents.

When the words "refer to" are used and the operator has an accepted alternative

procedure, the accepted alternative procedure can be used. When the words "in

accordance with" are included in the instruction, the procedure in the Boeing document

must be used.

5. Refer to 777 AMM 20-15-11 for on-airplane software installation maintenance

practices and data transfer times, as accepted procedures.

6. 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.

B. WORK INSTRUCTIONS

WORK PACKAGE 1 - SOFTWARE INSTALLATION

1. Install the Display Unit (DU) Database (DB) software shown below into the left and right Airplane

Information Management System (AIMS) Core Processor Module/Graphics Generator (CPM/GG).

Refer to 777 AMM 31-41-02 as an accepted procedure.

Software Name Software Part Number Media Set Part Number More Data

DU DB 3106-HNP-01W-04 PS4077999-904 (a)

(a) There are four CPM/GGs. There are two CPM/GGs (M10 and M11) in the left AIMS cabinet and two

CPM/GGs (M10 and M11) in the right AIMS cabinet. You install software in each CPM/GG.

2. Put the airplane back to a serviceable condition.

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BOEING SERVICE BULLETIN 777-31-0187
Group 1-2, Configuration 1; Group 2, Configuration 2:

WORK PACKAGE 2 - DISPLAY UNIT REPLACEMENT

1. Group 1-2, Configuration 1; Group 2, Configuration 2:

In the flight compartment, in the forward instrument panel, replace the existing non-video Phase

3 DUs with new non-video Phase 3A DUs. Refer to 777 AMM 31-61-01 as an accepted procedure.

Part Name New Part Number Existing Part Number More Data

Display Unit 4091900-941 4091900-931 (a)

(a) You can get the new part by reworking the existing part in accordance with Honeywell SB 4091900-31-

0002 Service Bulletin.

2. Group 1, Configuration 1; Group 2, Configuration 2:

Replace the existing video Phase 3 DUs with new video Phase 3A DUs. Refer to 777 AMM 31-61-01

as an accepted procedure.

Part Name New Part Number Existing Part Number More Data

Display Unit (Video) 4091900-943 4091900-933 (a)

(a) You can get the new part by reworking the existing part in accordance with Honeywell SB 4091900-31-

0002 Service Bulletin.

3. Do the DU installation test. Refer to 777 AMM 31-61-01 as an accepted procedure.

4. Put the airplane back to a serviceable condition.

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BOEING SERVICE BULLETIN 777-31-0187