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Commercial

Airplane

Group 777

SPECIAL ATTENTION

Service Bulletin

Number: 777-24-0106

Date: July 20, 2007

ATA System: 2409

SUBJECT: ELECTRICAL POWER - Electrical Load Management (ELM) System - Installation of 

Enclosure Trays for Debris Containment

BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET

Copyright © 2007 The Boeing Company

Unpublished Work - All Rights Reserved

Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable 

subject matter. Boeing also claims copyright in this document as a compilation and/or collective work.

This document includes proprietary information owned by The Boeing Company and/or one or more third 

parties. Treatment of the document and the information it contains is governed by contract with Boeing. For 

more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124.

Boeing, 707, 717, 727, 737, 747, 757, 767, 777, BBJ, BOEING BUSINESS JET, DC-8, DC-9, DC-10, MD-10, 

MD-11, MD-80, MD-90, the Boeing logo and the Boeing livery are among the trademarks owned by Boeing or 

its subsidiaries. No intellectual property license (express or implied) is granted in connection with this document 

or otherwise.
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BOEING SERVICE BULLETIN 777-24-0106

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 Table of Contents

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BOEING SERVICE BULLETIN 777-24-0106

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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

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

F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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

H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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 . . . . . . . . . . . . . . . . . . . . . . . . . 17

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

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

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

C. Parts Necessary For Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

1. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2. Parts and Materials Supplied by the Operator: . . . . . . . . . . . . . . . . . . . . . . 20

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

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

D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . 21

3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

FIGURE 1: LOCATION OF THE ELMS POWER PANELS . . . . . . . . . . . . . . . . . . . . . . . 25
 Table of Contents

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BOEING SERVICE BULLETIN 777-24-0106

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Commercial

Airplane

Group 777

SPECIAL ATTENTION

Service Bulletin

Number: 777-24-0106 Summary

Date: July 20, 2007

ATA System: 2409

SUBJECT: ELECTRICAL POWER - Electrical Load Management (ELM) System - Installation of 

Enclosure Trays for Debris Containment

BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY.

CONCURRENT REQUIREMENTS

Refer to Paragraph 1.B., Concurrent Requirements.

BACKGROUND

Accomplishment of the changes in this service bulletin will prevent a possible fire and or smoke and subsequent 

damage to insulation blanket and wiring below Electrical Load Management System (ELMS) panels. An ELMS 

contactor failure in a P100, P200 or P300 power panel can create molten debris. If the molten debris from the 

overheated ELMS contactor is not contained, damage to components from smoke and heat can occur and the 

smoke and heat can cause injury to persons.

One operator reported that an airplane on the ground experienced smoke and heat damage from insulation 

blankets that smouldered after molten debris from a P200 ELMS power panel fell on the insulation blankets. 

When a contactor in the ELMS panel fails and overheats, the heat can cause molten debris to fall out of the 

panel. The bottom of the ELMS panel are open without protection to prevent hot debris from falling on to the 

insulation blankets below the panel.

This service bulletin installs an enclosure tray on the heat shield of the ELMS panel. The enclosure tray will 

contain the debris and prevent hot debris from falling on the blankets and components below the ELMS panel 

in the event of a contactor failure. Containment of the hot debris will prevent damage from smoke and heat and 

reduce the risk to personal safety.

Boeing Service Related Problem (SRP) 777-SRP-24-0131 is related to this service bulletin.

ACTION (PRR62184-1)

Get access to the main equipment center. Change the heat shields on the P100, P200, and P300 power panels 

as given in the related Smiths Aerospace service bulletins. Close access to the main equipment center. Return 

the airplane to a serviceable condition.

EFFECTIVITY

777-200/-200LR/-300/-300ER Airplanes. Refer to Paragraph 1.A.1., Airplanes for the list of affected airplanes. 
 

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BOEING SERVICE BULLETIN 777-24-0106

COMPLIANCE

Boeing recommends that this service bulletin be incorporated within 60 months of the date on this service 

bulletin.

INDUSTRY SUPPORT INFORMATION

At the time of release of this service bulletin, warranty remedies have not been determined. A subsequent 

revision or Information Notice will address the warranty remedies available, if any.

MANPOWER

The time to make the change to the power panels as given in the Smiths service bulletin is not included.

MATERIAL INFORMATION

Boeing Supplied Kits/Parts.

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

Airplanes Total Task Hours Elapsed Hours

Group 1 3.00 3.00
 

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BOEING SERVICE BULLETIN 777-24-0106

WORK PACKAGE 3:

GET ACCESS TO THE P300 POWER PANEL. REMOVE

THE HEAT SHIELD (PROTECTIVE COVER) FROM

THE PANEL. INSTALL THE ENCLOSURE TRAY AS

GIVEN IN THE RELATED SMITHS AEROSPACE

BULLETIN. INSTALL THE CHANGED HEAT SHIELD.

MAIN EQUIPMENT CENTER

WORK PACKAGE 2:

GET ACCESS TO THE P200 POWER

PANEL. REMOVE THE HEAT SHIELD

(PROTECTIVE COVER) FROM THE

PANEL. INSTALL THE ENCLOSURE

TRAY AS GIVEN IN THE RELATED

SMITHS AEROSPACE BULLETIN.

INSTALL THE CHANGED HEAT 

SHIELD.

WORK PACKAGE 1:

GET ACCESS TO THE P100 POWER PANEL.

REMOVE THE HEAT SHIELD (PROTECTIVE

COVER) FROM THE PANEL. INSTALL THE

ENCLOSURE TRAY AS GIVEN IN THE

RELATED SMITHS AEROSPACE BULLETIN.

INSTALL THE CHANGED HEAT SHIELD.

FWD

1420290
 

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BOEING SERVICE BULLETIN 777-24-0106

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July 20, 2007

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Commercial

Airplane

Group 777

SPECIAL ATTENTION

Service Bulletin

Number: 777-24-0106

Date: July 20, 2007

ATA System: 2409

SUBJECT: ELECTRICAL POWER - Electrical Load Management (ELM) System - Installation of 

Enclosure Trays for Debris Containment

BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY.

1. PLANNING INFORMATION

A. Effectivity

1. Airplanes

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

Number, and Serial Number data.

This service bulletin is for the airplanes shown below. An equivalent change is on subsequent 

production airplanes. Refer to PRR62184-1 for data about this change.

Airplane models:

777-200 777-200LR 777-300 777-300ER

IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER

AEROMEXICO (AMX)

1 WB341 WC521–WC522

AIR AUSTRAL (AUX)

1 WB366–WB368

AIR CANADA (ACN)

1 WD031–WD032 WD741–WD745

AIR CHINA (BEJ)

1 WA241–WA250

GROUP CONFIGURATION DESCRIPTION

1 - 777-200/-200LR/-300/-300ER airplanes
 

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BOEING SERVICE BULLETIN 777-24-0106

AIR FRANCE (AFA)

1 WB311–WB335 WD521–WD536 WD546–WD552

AIR INDIA (AIN)

1 WA007 WB058–WB059 WB070 WD011–WD014

WD826–WD828

AIR NEW ZEALAND (ANZ)

1 WC486–WC493

AIRCRAFT MARKETING LTD. (CFK)

1 WA079–WA080

ALITALIA (ALI)

1 WC281–WC290

ALL NIPPON AIRWAYS (ANA)

1 WA131–WA137 WA221–WA223 WA231–WA232 WA301–WA304

WB481–WB484 WB531–WB537 WC506–WC508 WD561–WD571

AMERICAN AIRLINES (AAL)

1 WB416–WB439 WC051–WC073

ASIANA AIRLINES (AAR)

1 WC111–WC119

AUSTRIAN (AUL)

1 WB271–WB273 WC556

BRITISH AIRWAYS (BAB)

1 WA076–WA078 WB001–WB021 WB031–WB046 WB411–WB413

CATHAY PACIFIC AIRWAYS (CAT)

1 WA001 WA101–WA104 WB501–WB512 WD796–WD797

CHINA SOUTHERN AIRLINES (GUN)

1 WA116–WA119 WB121–WB125 WC441

CONTINENTAL AIRLINES (CAL)

1 WB371–WB388 WC221–WC222

DELTA AIR LINES (DAL)

1 WB446–WB453

EGYPTAIR (EGP)

1 WB151–WB155

EL AL ISRAEL AIRLINES (ELA)

1 WC101–WC104 WC566–WC567

EMIRATES (EAD)

1 WA196–WA198 WB101–WB106 WB631–WB638 WB646–WB649

WD046–WD047 WD581–WD594 WD606–WD609 WD621–WD632
 

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BOEING SERVICE BULLETIN 777-24-0106

ETIHAD AIRWAYS (ETI)

1 WD671–WD675

EVA AIR (EVA)

1 WD651–WD657

ILFC (ILF)

1 WB342

JAL INTERNATIONAL (JAL)

1 WA171–WA175 WA206–WA212 WA281–WA283 WB591–WB597

WC241–WC243 WC301–WC308 WD501–WD507

JET AIRWAYS (JPL)

1 WD761–WD766

KENYA AIRWAYS (KEN)

1 WC456–WC459

KLM - ROYAL DUTCH AIRLINES (KLM)

1 WC381–WC395

KOREAN AIR (KAL)

1 WB131–WB144 WB551–WB554

KUWAIT AIRWAYS (KUW)

1 WB306–WB307

MALAYSIA AIRLINES (MAS)

1 WB161–WB177

MID EAST JET (SKL)

1 WB406

PAKISTAN INT'L AIRLINES (PIA)

1 WC446–WC449 WD001–WD002 WD786–WD787

ROYAL BRUNEI AIRLINES (RBA)

1 WB072–WB073

SAUDI ARABIAN AIRLINES (SVA)

1 WB276–WB286 WB291–WB302

SAUDI OGER (SAO)

1 WB476

SINGAPORE AIRLINES (SIA)

1 WB181–WB194 WB201–WB215 WB231–WB247 WB611–WB622

WD691–WD700

TAAG (ANGOLA AIRLINES) (ANG)

1 WC546–WC547
 

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BOEING SERVICE BULLETIN 777-24-0106

THAI AIRWAYS INTERNATIONAL (TII)

1 WA086–WA093 WB601–WB606 WC531–WC535

UNITED AIRLINES (UAL)

1 WA002–WA006 WA009–WA010 WA012–WA017 WA261–WA266

WB051–WB057 WB060–WB069 WB071 WB074–WB088

VARIG AIRLINES (VAR)

1 WA008 WA011

VIETNAM AIRLINES (VIE)

1 WB336–WB337 WC361–WC364 WC371–WC374

IDENTIFICATION BY VARIABLE NUMBER

Variable Group

WA001–WA017 1

WA076–WA080 1

WA086–WA093 1

WA101–WA104 1

WA116–WA119 1

WA131–WA137 1

WA171–WA175 1

WA196–WA198 1

WA206–WA212 1

WA221–WA223 1

WA231–WA232 1

WA241–WA250 1

WA261–WA266 1

WA281–WA283 1

WA301–WA304 1

WB001–WB021 1

WB031–WB046 1

WB051–WB088 1

WB101–WB106 1

WB121–WB125 1

WB131–WB144 1

WB151–WB155 1

WB161–WB177 1

WB181–WB194 1

WB201–WB215 1

WB231–WB247 1

WB271–WB273 1
 

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BOEING SERVICE BULLETIN 777-24-0106

WB276–WB286 1

WB291–WB302 1

WB306–WB307 1

WB311–WB337 1

WB341–WB342 1

WB366–WB368 1

WB371–WB388 1

WB406 1

WB411–WB413 1

WB416–WB439 1

WB446–WB453 1

WB476 1

WB481–WB484 1

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 1

WC101–WC104 1

WC111–WC119 1

WC221–WC222 1

WC241–WC243 1

WC281–WC290 1

WC301–WC308 1

WC361–WC364 1

WC371–WC374 1

WC381–WC395 1

WC441 1

WC446–WC449 1

WC456–WC459 1

WC486–WC493 1

WC506–WC508 1

WC521–WC522 1

WC531–WC535 1

WC546–WC547 1

Variable Group
 

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BOEING SERVICE BULLETIN 777-24-0106

2. Spares Affected

None.

B. Concurrent Requirements

The service bulletin(s)listed below must be done before or at the same time as this service bulletin:

WC556 1

WC566–WC567 1

WD001–WD002 1

WD011–WD014 1

WD031–WD032 1

WD046–WD047 1

WD501–WD507 1

WD521–WD536 1

WD546–WD552 1

WD561–WD571 1

WD581–WD594 1

WD606–WD609 1

WD621–WD632 1

WD651–WD657 1

WD671–WD675 1

WD691–WD700 1

WD741–WD745 1

WD761–WD766 1

WD786–WD787 1

WD796–WD797 1

WD826–WD828 1

Company Service Bulletin Description

Smiths Aerospace 1000ELM-24-666 Gives the procedures to install an enclosure tray on the 

heat shield of the ELMS P100 power panel

Smiths Aerospace 2000ELM-24-667 Gives the procedures to install an enclosure tray on the 

heat shield of the ELMS P200 power panel

Smiths Aerospace 3000ELM-24-668 Gives the procedures to install an enclosure tray on the 

heat shield of the ELMS P300 power panel

Variable Group
 

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BOEING SERVICE BULLETIN 777-24-0106

C. Reason

Accomplishment of the changes in this service bulletin will prevent a possible fire and or smoke and 

subsequent damage to insulation blanket and wiring below Electrical Load Management System 

(ELMS) panels. An ELMS contactor failure in a P100, P200 or P300 power panel can create molten 

debris. If the molten debris from the overheated ELMS contactor is not contained, damage to 

components from smoke and heat can occur and the smoke and heat can cause injury to persons.

One operator reported that an airplane on the ground experienced smoke and heat damage from 

insulation blankets that smouldered after molten debris from a P200 ELMS power panel fell on the 

insulation blankets. When a contactor in the ELMS panel fails and overheats, the heat can cause 

molten debris to fall out of the panel. The bottom of the ELMS panel are open without protection to 

prevent hot debris from falling on to the insulation blankets below the panel.

This service bulletin installs an enclosure tray on the heat shield of the ELMS panel. The enclosure 

tray will contain the debris and prevent hot debris from falling on the blankets and components below 

the ELMS panel in the event of a contactor failure. Containment of the hot debris will prevent damage 

from smoke and heat and reduce the risk to personal safety.

Boeing Service Related Problem (SRP) 777-SRP-24-0131 is related to this service bulletin.

D. Description

Get access to the main equipment center. Change the heat shields on the P100, P200, and P300 

power panels as given in the related Smiths Aerospace service bulletins. Close access to the main 

equipment center. Return the airplane to a serviceable condition.

E. Compliance

Boeing recommends that this service bulletin be incorporated within 60 months of the date on this 

service bulletin.

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.
 

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BOEING SERVICE BULLETIN 777-24-0106

G. Manpower

The changes to the P100 power panel as given in Smiths Aerospace Service Bulletin 1000ELM-24-

666 are not included.

The changes to the P200 power panel as given in Smiths Aerospace Service Bulletin 2000ELM-24-

667 are not included.

The changes to the P300 power panel as given in Smiths Aerospace Service Bulletin 3000ELM-24-

668 are not included.

H. Weight and Balance Changes

I. Electrical Load Data

Not changed.

J. References

1. Existing Data:

a. Engineering Change Memo PRR62184-1

Task

Number of 

Persons Task Hours Elapsed Hours

Open Access 1 0.50 0.50

Close Access 1 0.50 0.50

TOTAL FOR EACH AIRPLANE 1.00 1.00

Task

Number of 

Persons Task Hours Elapsed Hours

Open Access 1 0.50 0.50

Close Access 1 0.50 0.50

TOTAL FOR EACH AIRPLANE 1.00 1.00

Task

Number of 

Persons Task Hours Elapsed Hours

Open Access 1 0.50 0.50

Close Access 1 0.50 0.50

TOTAL FOR EACH AIRPLANE 1.00 1.00

Airplane

Change in Weight 

(Pounds)

Change in Moment 

(Pound-Inches)

777-200 +2.9 +914.8

Airplane

Change in Weight 

(Pounds)

Change in Moment 

(Pound-Inches)

777-300 +2.9 +332.8
 

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BOEING SERVICE BULLETIN 777-24-0106

b. 777 Aircraft Maintenance Manual (AMM) 24-22-00

c. Boeing Drawing 012W6100 

d. Boeing Parts Standards Document D-590

e. Service Related Problem (SRP) 777-SRP-24-0131

f. Smiths Aerospace SB 1000ELM-24-666

g. Smiths Aerospace SB 2000ELM-24-667

h. Smiths Aerospace SB 3000ELM-24-668

2. Data supplied with this Service Bulletin:

None.

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

None.

K. Publications Affected

L. Interchangeability and Intermixability of Parts

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

information.

Publication Chapter-Section

777 Illustrated Parts Catalog 24-09

Component Maintenance Manual 24-08-16, 24-08-36, 24-08-73
 

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BOEING SERVICE BULLETIN 777-24-0106

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BOEING SERVICE BULLETIN 777-24-0106

2. MATERIAL INFORMATION

A. Material - Price and Availability

Boeing can supply the kits shown in Paragraph 2.C., Parts Necessary For Each Airplane, and 

Paragraph 2.D., Parts Necessary to Change Spares, as shown below. If there is a limit to the quantity 

(QTY) of available kits, a supply sequence is given by Spares. More kits become available as shown 

in the Reorder Lead Time (ROLT). ROLT is calculated from the date Boeing gets the purchase order.

B. Industry Support Information

At the time of release of this service bulletin, warranty remedies have not been determined. A 

subsequent revision or Information Notice will address the warranty remedies available, if any.

Kit Number Name Date QTY

ROLT 

(Weeks)

Unit Price thru

Dec 31/07

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

6/29/07 1 16 $1,729.00

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

7/30/07 49 16 $1,729.00

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

8/27/07 50 16 $1,729.00

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

10/23/07 50 16 $1,729.00

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

12/03/07 50 16 $1,729.00

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

1/30/08 50 16 $1,729.00

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

3/31/07 50 16 $1,729.00

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

5/30/08 50 16 $1,729.00

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

7/29/08 50 16 $1,729.00

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

9/30/08 50 16 $1,729.00

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

12/03/08 50 16 $1,729.00

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

1/30/08 50 16 $1,729.00

005W3353-1 Top Kit - ELMS Containment 

Shield Installation

3/30/09 51 16 $1,729.00
 

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BOEING SERVICE BULLETIN 777-24-0106

C. Parts Necessary For Each Airplane

1. Kits/Parts:

NOTE: One top kit and the items shown in Paragraph 2.C.2., Parts and Materials Supplied by

the Operator, are necessary for each airplane.

To get the kits/parts shown below, refer to Paragraph 2.A., Material - Price and Availability.

2. Parts and Materials Supplied by the Operator:

None.

3. Parts Modified and Reidentified:

Refer to the applicable Smiths Aerospace Service Bulletin in the subsequent table.

4. Parts Removed and Not Replaced:

None.

Kit 005W3353 

New Part Number

QTY

-1 Name Notes

005W3353-1 - Top Kit - ELMS Containment Shield Installation (b)

284W2093-1 1 BRACKET ASSY - P100 PANEL HEAT SHIELD

284W2093-3 1 BRACKET ASSY - P200 PANEL HEAT SHIELD

284W2093-5 1 BRACKET ASSY - P300 PANEL HEAT SHIELD

BACR15FP4E3R 

(BACR15BA4AD3C- optional)

24 RIVET, BLIND (a)

(a) If grip length shown is not available at Boeing, fasteners supplied in kits may be one grip length 

longer than indicated. Also, if any fasteners part numbers listed are not available or have been 

superseded, substitute fasteners may be supplied in kits. Boeing Document D-590 and Boeing 

Drawing 012W6100 are used to determine the part numbers used as substitutes.

(b) The enclosure tray is also known as a containment shield or a bracket assembly.

Power Panel Service Bulletin

P100 1000ELM-24-666

P200 2000ELM-24-667

P300 3000ELM-24-668
 

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D. Parts Necessary to Change Spares

Refer to the applicable Smiths Aerospace Service Bulletin in the subsequent table.

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.

Power Panel Service Bulletin

P100 1000ELM-24-666

P200 2000ELM-24-667

P300 3000ELM-24-668
 

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BLANK PAGE
 

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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. You can do each work 

package independently.

4. These work instructions refer to procedures included on 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 "as given 

in" are included in the instruction, the procedure in the Boeing document must be used.

B. WORK INSTRUCTIONS

Work Package 1

1. Remove electrical power from the airplane. Refer to 777 AMM 24-22-00 as an accepted 

procedure.

2. Get access to the main equipment center. Open the 117AL Main Equipment Center Access 

Door.

3. Locate the Electrical Load Management System (ELMS) P100 power panel. See Figure 1.

WARNING: IF THE ELECTRICAL POWER IS NOT REMOVED FROM THE AIRPLANE, THE

POWER PANEL WILL CONTAIN HIGH VOLTAGES AND CURRENTS THAT CAN

CAUSE AND INJURY TO PERSONS AND DAMAGE EQUIPMENT.

4. Change the heat shield as given in the Smiths Aerospace SB 1000ELM-24-666.

5. Close access to the main equipment center. Close the 117AL Main Equipment Center Access 

Door.

6. Restore electrical power to the airplane. Refer to 777 AMM 24-22-00 as an accepted procedure.

7. Put the airplane back to a serviceable condition.
 

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Work Package 2

1. Remove electrical power from the airplane. Refer to 777 AMM 24-22-00 as an accepted 

procedure.

2. Get access to the main equipment center. Open the 117AL Main Equipment Center Access 

Door.

3. Locate the ELMS P200 power panel. See Figure 1.

WARNING: IF THE ELECTRICAL POWER IS NOT REMOVED FROM THE AIRPLANE, THE

POWER PANEL WILL CONTAIN HIGH VOLTAGES AND CURRENTS THAT CAN

CAUSE AND INJURY TO PERSONS AND DAMAGE EQUIPMENT.

4. Change the heat shield as given in the Smiths Aerospace SB 2000ELM-24-667.

5. Close access to the main equipment center. Close the 117AL Main Equipment Center Access 

Door.

6. Restore electrical power to the airplane. Refer to 777 AMM 24-22-00 as an accepted procedure.

7. Put the airplane back to a serviceable condition.

Work Package 3

1. Remove electrical power from the airplane. Refer to 777 AMM 24-22-00 as an accepted 

procedure.

2. Get access to the main equipment center. Open the 117AL Main Equipment Center Access 

Door.

3. Locate the ELMS P300 power panel. See Figure 1.

WARNING: IF THE ELECTRICAL POWER IS NOT REMOVED FROM THE AIRPLANE, THE

POWER PANEL WILL CONTAIN HIGH VOLTAGES AND CURRENTS THAT CAN

CAUSE AND INJURY TO PERSONS AND DAMAGE EQUIPMENT.

4. Change the heat shield as given in the Smiths Aerospace SB 3000ELM-24-668 service bulletin.

5. Close access to the main equipment center. Close the 117AL Main Equipment Center Access 

Door.

6. Restore electrical power to the airplane. Refer to 777 AMM 24-22-00 as an accepted procedure.

7. Put the airplane back to a serviceable condition.
 FIGURE 1: LOCATION OF THE ELMS POWER PANELS

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FIGURE 1: LOCATION OF THE ELMS POWER PANELS

MAIN EQUIPMENT CENTER

(RIGHT, LOOKING AFT)

MAIN EQUIPMENT CENTER

(LEFT, LOOKING AFT)

MAIN EQUIPMENT 

CENTER P100

P200

P300

P200 RIGHT

P300 AUXILIARY

POWER PANEL

POWER PANEL

P100 LEFT

POWER PANEL

FWD

A

SEE A

B

SEE B

SEE B

3

1

2

1420298

(SHEET 1 OF 2)
 FIGURE 1: LOCATION OF THE ELMS POWER PANELS

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BOEING SERVICE BULLETIN 777-24-0106

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY 

numbers shown below are the number of parts necessary for this figure.

STEP TASK NAME IDENTIFICATION QTY MORE DATA

1 Locate ELMS P100 Panel - 1

2 Locate ELMS P200 Panel - 1

3 Locate ELMS P300 Panel - 1

(SHEET 2 OF 2)