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Commercial

Airplane

Group 777

SPECIAL ATTENTION

Service Bulletin

Number: 777-29-0032

Date: August 09, 2007

ATA System: 2911

SUBJECT: HYDRAULIC POWER - Main Hydraulic Systems - Nose Landing Gear Alternate 

Extension Hydraulic Tube - Change

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Unpublished Work - All Rights Reserved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 777-29-0032

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 Table of Contents

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BOEING SERVICE BULLETIN 777-29-0032

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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

G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2. Data supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . 16

3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . 16

K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . 16

2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

C. Parts Necessary For Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2. Parts and Materials Supplied by the Operator: . . . . . . . . . . . . . . . . . . . . . . 17

3. Parts Modified and Reidentified: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4. Parts Removed and Not Replaced: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . 18

3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

FIGURE 1: Main Equipment Center - Hydraulic Tube - Access and Change . . . . . . . . . . . . . . 20
 Table of Contents

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BOEING SERVICE BULLETIN 777-29-0032

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Commercial

Airplane

Group 777

SPECIAL ATTENTION

Service Bulletin

Number: 777-29-0032 Summary

Date: August 09, 2007

ATA System: 2911

SUBJECT: HYDRAULIC POWER - Main Hydraulic Systems - Nose Landing Gear Alternate 

Extension Hydraulic Tube - Change

BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY.

CONCURRENT REQUIREMENTS

None.

BACKGROUND

This change prevents damage to the subject hydraulic tube and possible fire caused by arcing of an external 

power connector in the P30 panel. If this service bulletin is not accomplished, there is a risk of fire and personal 

injury during ground operations if hydraulic fluid contacts an external power connector after arcing occurs. 

An operator reported a fire in the main equipment center after the maintenance crew connected external power. 

The cause of the fire was traced to a failure of an external power connector in the P30 panel, which caused hightemperature arcing and splatter of molten copper on an adjacent hydraulic tube. The molten copper splatter 

created a hole in the tube, and hydraulic fluid sprayed into the power connector and caught on fire.

At the time of the fire, the airplane was at the gate and passengers were deplaning. The fire department 

responded to the fire and extinguished it. Five firemen were taken to the hospital because of fume inhalation. 

There were no injuries to the passengers, flight crew, or ground crew.

Boeing Service Related Problem (SRP) 777-SRP-24-0120 is related to this service bulletin.

ACTION (PRR 62777-46S)

In the main equipment center, wrap self-fusing fire resistant silicone tape around the section of the nose landing 

gear alternate extension hydraulic tube that is adjacent to the P30 panel.

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 777-29-0032

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 this service bulletin be done within 36 months from the date on this service bulletin.

INDUSTRY SUPPORT INFORMATION

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

MANPOWER

MATERIAL INFORMATION

Operator Supplied Parts/Materials.

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

Airplanes Total Task Hours Elapsed Hours

All 2.00 2.00
 

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BOEING SERVICE BULLETIN 777-29-0032

P30 EXTERNAL

POWER PANEL RIGHT POWER

MANAGEMENT

PANEL, P210

WRAP SILICONE

TAPE AROUND

HYDRAULIC

TUBE

E4 RACK

MAIN EQUIPMENT CENTER

(RACKS E3, E4)

SEE A

FWD

A

FWD

U83746
 

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BOEING SERVICE BULLETIN 777-29-0032

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Commercial

Airplane

Group 777

SPECIAL ATTENTION

Service Bulletin

Number: 777-29-0032

Date: August 09, 2007

ATA System: 2911

SUBJECT: HYDRAULIC POWER - Main Hydraulic Systems - Nose Landing Gear Alternate 

Extension Hydraulic Tube - Change

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 PRR 62777-46S 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 CHINA (BEJ)

1 WA241–WA250

AIR FRANCE (AFA)

1 WB311–WB335 WD521–WD533 WD546–WD549

GROUP CONFIGURATION DESCRIPTION

1 - All affected airplanes
 

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AIR INDIA (AIN)

1 WA007 WB058–WB059 WB070

AIR NEW ZEALAND (ANZ)

1 WC486–WC491

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–WD565

AMERICAN AIRLINES (AAL)

1 WB416–WB439 WC051–WC073

ASIANA AIRLINES (AAR)

1 WC111–WC117

AUSTRIAN (AUL)

1 WB271–WB273

BOEING AIRCRAFT TRADING (BTU)

1 WA079–WA080

BRITISH AIRWAYS (BAB)

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

CATHAY PACIFIC AIRWAYS (CAT)

1 WA001 WA101–WA104 WB501–WB512

CHINA SOUTHERN AIRLINES (GUN)

1 WA116–WA119 WB121–WB125 WC441

CONTINENTAL AIRLINES (CAL)

1 WB371–WB388

DELTA AIR LINES (DAL)

1 WB446–WB453

EGYPTAIR (EGP)

1 WB151–WB155

EL AL ISRAEL AIRLINES (ELA)

1 WC101–WC104

EMIRATES (EAD)

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

WD581–WD589 WD606–WD608 WD621–WD627

ETIHAD AIRWAYS (ETI)

1 WD671–WD675
 

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EVA AIR (EVA)

1 WD651–WD653

ILFC (ILF)

1 WB342

JAL DOMESTIC (JAS)

1 WA206–WA212

JAL INTERNATIONAL (JAL)

1 WA171–WA175 WA281–WA282 WB591–WB597 WC241–WC243

WC301–WC308 WD501–WD506

KENYA AIRWAYS (KEN)

1 WC456–WC458

KLM - ROYAL DUTCH AIRLINES (KLM)

1 WC381–WC393

KOREAN AIR (KAL)

1 WB131–WB142 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–WC448 WD001–WD002

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

TAAG (ANGOLA AIRLINES) (ANG)

1 WC546

THAI AIRWAYS INTERNATIONAL (TII)

1 WA086–WA093 WB601–WB606

UNITED AIRLINES (UAL)

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

WB051–WB057 WB060–WB069 WB071 WB074–WB088
 

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VARIG AIRLINES (VAR)

1 WA008 WA011 WB072–WB073

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–WA282 1

WA301–WA304 1

WB001–WB021 1

WB031–WB046 1

WB051–WB088 1

WB101–WB106 1

WB121–WB125 1

WB131–WB142 1

WB151–WB155 1

WB161–WB177 1

WB181–WB194 1

WB201–WB215 1

WB231–WB247 1

WB271–WB273 1

WB276–WB286 1

WB291–WB302 1

WB306–WB307 1

WB311–WB337 1

WB341–WB342 1

WB366–WB368 1
 

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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–WC117 1

WC241–WC243 1

WC281–WC290 1

WC301–WC308 1

WC361–WC364 1

WC371–WC374 1

WC381–WC393 1

WC441 1

WC446–WC448 1

WC456–WC458 1

WC486–WC491 1

WC506–WC508 1

WC521–WC522 1

WC546 1

WD001–WD002 1

WD501–WD506 1

WD521–WD533 1

WD546–WD549 1

WD561–WD565 1

WD581–WD589 1

WD606–WD608 1

Variable Group
 

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2. Spares Affected

None.

B. Concurrent Requirements

None.

C. Reason

This change prevents damage to the subject hydraulic tube and possible fire caused by arcing of an 

external power connector in the P30 panel. If this service bulletin is not accomplished, there is a risk 

of fire and personal injury during ground operations if hydraulic fluid contacts an external power 

connector after arcing occurs. 

An operator reported a fire in the main equipment center after the maintenance crew connected 

external power. The cause of the fire was traced to a failure of an external power connector in the 

P30 panel, which caused high-temperature arcing and splatter of molten copper on an adjacent 

hydraulic tube. The molten copper splatter created a hole in the tube, and hydraulic fluid sprayed into 

the power connector and caught on fire.

At the time of the fire, the airplane was at the gate and passengers were deplaning. The fire 

department responded to the fire and extinguished it. Five firemen were taken to the hospital because 

of fume inhalation. There were no injuries to the passengers, flight crew, or ground crew.

Boeing Service Related Problem (SRP) 777-SRP-24-0120 is related to this service bulletin.

D. Description

In the main equipment center, wrap self-fusing fire resistant silicone tape around the section of the 

nose landing gear alternate extension hydraulic tube that is adjacent to the P30 panel.

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 this service bulletin be done within 36 months from the date on this service 

bulletin.

WD621–WD627 1

WD651–WD653 1

WD671–WD675 1

Variable Group
 

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BOEING SERVICE BULLETIN 777-29-0032

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

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 examine the work

— Time to cure the materials

— Time to make the parts

— Time to find the tools.

H. Weight and Balance Changes

None.

I. Electrical Load Data

Not changed.

J. References

1. Existing Data:

a. Engineering Change Memo PRR 62777-46S

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

c. Boeing Service Related Problem (SRP) 777-SRP-24-0120

d. Standard Overhaul Practices Manual (SOPM) 20-30-03, 20-50-10

Task

Number of 

Persons Task-Hours Elapsed Hours

Remove external power 1 0.50 0.50

Figure 1 1 1.50 1.50

TOTAL FOR EACH AIRPLANE 2.00 2.00
 

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BOEING SERVICE BULLETIN 777-29-0032

2. Data supplied with this Service Bulletin:

None.

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

These drawings were used to prepare this service bulletin. These drawings are not necessary 

to make the specified changes, and are not supplied with this service bulletin. These drawings 

may not be applicable to all airplane configurations or operators.

K. Publications Affected

L. Interchangeability and Intermixability of Parts

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

information.

Drawing Number Title

208W4149 Tubing Installation Cargo Floor Beams STA 332.5 - 652

272W4190 Tubing Installation - Hydraulic, Section 41

Publication Chapter-Section

777 Illustrated Parts Catalog 29-11
 

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BOEING SERVICE BULLETIN 777-29-0032

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:

3. Parts Modified and Reidentified:

4. Parts Removed and Not Replaced:

None.

D. Parts Necessary to Change Spares

None.

E. Special Tooling - Price and Availability

None.

Part Number / 

Specification QTY Name Notes

Scotch 70 7 ft. Electrical Tape, Self-Fusing, 

Silicone Rubber

(a)

(a) 3M Company (V76381)

3M Center

St. Paul, Minnesota 55144-1000

Existing Part 

Number QTY Name New Part Number Notes

272W4190-93 1 Tube Assy - (a) (b) (c)

272W4190-168 1 Tube Assy - (a) (b) (c)

(a) Make the change given in this service bulletin.

(b) There is no equivalent Boeing part number for the changed part. Identify on the part that 

the change given in this service bulletin was made.

(c) The equivalent production part number is 272W4190-192.
 

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BOEING SERVICE BULLETIN 777-29-0032

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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3. ACCOMPLISHMENT INSTRUCTIONS

A. GENERAL INFORMATION

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. 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

1. Remove primary and secondary external power from the airplane. Refer to 777 AMM 24-22-00 

as an accepted procedure.

2. Get access to and change the hydraulic tube as given in Figure 1.

3. Put the airplane back to a serviceable condition.
 FIGURE 1: Main Equipment Center - Hydraulic Tube - Access and Change

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FIGURE 1: Main Equipment Center - Hydraulic Tube - Access and Change

E4 RACK

E2 RACK

E4 RACK

E2 RACK

P210 RIGHT POWER

MANAGEMENT PANEL

12 LOCATIONS

FWD

FWD A

SEE A

SEE B

1 7

2 6

U84492

(SHEET 1 OF 3)
 FIGURE 1: Main Equipment Center - Hydraulic Tube - Access and Change

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BOEING SERVICE BULLETIN 777-29-0032

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 Remove/Keep Fasteners - 12

2 Remove/Keep Floor Panel Assy 284W8165-14 1

3 Clean Hydraulic Tube 272W4190-93 or 

272W4190-168

1 Solvent clean the area 

where the tape will be 

installed. Refer to SOPM 

20-30-03 as an accepted 

procedure.

4 Install (New) Electrical Tape Scotch 70 - (a)

PERMASWAGE

FITTING

13.0 ± 0.5

0.5

MAXIMUM

5

3

B

4

FWD

U85500

(SHEET 2 OF 3)
 FIGURE 1: Main Equipment Center - Hydraulic Tube - Access and Change

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BOEING SERVICE BULLETIN 777-29-0032

5 Apply Service Bulletin 

Number

- - Apply the service bulletin 

number to the tube. Do not 

mark on the Scotch 70 tape. 

Refer to SOPM 20-50-10 as 

an accepted procedure.

6 Install (Kept) Floor Panel Assy 284W8165-14 1

7 Install (Kept) Fasteners - 12

(a) Wind a continuous length of tape from one end to the other and back again, for a total of two wraps. 

Make sure that each turn has an overlap of 67% or more. Keep the tension moderate and constant, 

and stretch the tape between 10 and 100%. Do not stretch the tape when you do the last turn. 

Push down on the ends of the tape to make sure they do not lift up before the tape fuses.

STEP TASK NAME IDENTIFICATION QTY MORE DATA

(SHEET 3 OF 3)