Commercial 

Airplanes 777

Service Bulletin

ALERT

Number: 777-35A0029

Original Issue: June 06, 2012

Revision 1: April 29, 2013

ATA System: 3523

SUBJECT: OXYGEN - Supernumerary Oxygen System - Pressurized Oxygen System Low Pressure

Oxygen Hose Replacement

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Unpublished Work.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.

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BLANK PAGE
Table of Contents

Revision Transmittal Sheet ............................................ 5

Summary ...................................................... 7

1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

E. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2. Data Supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . . 14

K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

M. Software Accomplishment Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

A. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

C. Parts Necessary for Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2. Parts and Materials Supplied by the Operator . . . . . . . . . . . . . . . . . . . . . . . . 16

3. Parts Modified and Reidentified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4. Parts Removed and Not Replaced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 17

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

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

B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

FIGURE 1: STOWAGE BOX LOW PRESSURE OXYGEN HOSE REPLACEMENTS . . . . . . . . . 21

FIGURE 2: LOW PRESSURE OXYGEN HOSE REPLACEMENTS . . . . . . . . . . . . . . . . . . . 24

FIGURE 3: SUPERNUMERARY INTERIOR RESTORATION . . . . . . . . . . . . . . . . . . . . . . 27

APPENDIX A: OXYGEN HOSE TO STOWAGE BOX INSTALLATION . . . . . . . . . . . . . . . . . . . 29

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ALERT ALERT

BLANK PAGE
Commercial 

Airplanes 777

Service Bulletin

ALERT

Revision Transmittal Sheet Number: 777-35A0029

Original Issue: June 06, 2012

Revision 1: April 29, 2013

ATA System: 3523

SUBJECT: OXYGEN - Supernumerary Oxygen System - Pressurized Oxygen System Low Pressure

Oxygen Hose Replacement

This revision includes all pages of the service bulletin.

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.

More work is necessary on the airplane(s) changed in accordance with the original issue of this service bulletin

which did not remove low pressure oxygen hoses 57034-08A050140 and did not install non-conductive low

pressure oxygen hoses 57034-33N040140. These airplanes must replace the low pressure oxygen hose

assemblies in accordance with Figure 1.

No more work is necessary on the airplane(s) changed in accordance with the original issue of this service

bulletin if low pressure oxygen hoses 57034-08A050140 were removed and non-conductive low pressure oxygen

hoses 57034-33N040140 were installed.

REASON FOR REVISION

This revision is sent to correct the reference to the part numbers of the low pressure oxygen hoses in Figure 1.

These sections were changed:

1. Summary, Compliance, Added possible AD paragraph.

2. Paragraph 1.E., Compliance, Added possible AD paragraph.

3. Paragraph 1.K., Publications Affected, Added publications.

4. Figure 1, Changed step table.

Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity, to show the location

of important changes.

Pages with no vertical lines have no important changes.

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REVISION HISTORY

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
Commercial 

Airplanes 777

Service Bulletin

ALERT

Summary Number: 777-35A0029

Original Issue: June 06, 2012

Revision 1: April 29, 2013

ATA System: 3523

SUBJECT: OXYGEN - Supernumerary Oxygen System - Pressurized Oxygen System Low Pressure

Oxygen Hose Replacement

THIS BULLETIN 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 THIS SERVICE BULLETIN TO

THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO

THE NEW OWNER.

CONCURRENT REQUIREMENTS

None.

BACKGROUND

The changes provided in this service bulletin will help prevent damage to the low pressure oxygen hoses that

may be subjected to electrical current. An electrical current condition in the low pressure oxygen hose can cause

the low pressure oxygen hose to melt or burn. This could result in smoke and/or fire in the supernumerary area.

This service bulletin will replace low pressure oxygen hoses with non-conductive low pressure oxygen hoses

located in the supernumerary area. The replacement of the low pressure oxygen hoses will prevent electrical

current from passing through the low pressure oxygen hose internal anti-collapse spring which can cause the

low pressure oxygen hose to melt or burn.

Boeing Service Related Problem (SRP) 777-SRP-35-0050 is related to this service bulletin.

Boeing Fleet Team Digest (FTD) 777 FTD 35-11003 is related to this service bulletin.

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

information.

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

information.

Planning Data Affected Reference

Spares Affected No Paragraph 1.A.2., Spares Affected

Paragraph 1.E., Compliance and Paragraph

1.F., Approval

AD Related Yes

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 Yes Paragraph 2.C.1., Kits/Parts

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

by the Operator

Operator Supplied Parts/Material No

Paragraph 2.F., Special Tooling Necessary to

do this Service Bulletin

Special Tooling Required No

ACTION

Remove the stowage boxes for the oxygen masks. Remove ceiling panels. Replace the existing low pressure

oxygen hoses with the new non-conductive low pressure oxygen hoses. Perform a leak test.

EFFECTIVITY

777F Airplanes with pressurized supernumerary oxygen systems. Refer to Paragraph 1.A.1., Airplanes, for the

list of affected airplanes.

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 36 months after the original

issue date of this service bulletin.

INDUSTRY SUPPORT INFORMATION

Boeing warranty remedies are available for airplanes in warranty as of September 30, 2011. Please refer to

Paragraph 2.B., Industry Support Information.

MANPOWER

Airplanes Total Task Hours Elapsed Hours

TOTAL FOR 6.60 6.60

EACH AIRPLANE

MATERIAL INFORMATION

Boeing Supplied Kits/Parts.

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

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ALERT ALERT

BLANK PAGE
Commercial 

Airplanes 777

Service Bulletin

ALERT

Number: 777-35A0029

Original Issue: June 06, 2012

Revision 1: April 29, 2013

ATA System: 3523

SUBJECT: OXYGEN - Supernumerary Oxygen System - Pressurized Oxygen System Low Pressure

Oxygen Hose Replacement

THIS BULLETIN 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 THIS SERVICE BULLETIN TO

THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO

THE NEW OWNER.

1. PLANNING INFORMATION

A. Effectivity

1. Airplanes

Refer to Service Bulletin Index Document D624T001 Part 3 for Airplane Variable Number,

LineNumber, and Serial Number data.

This service bulletin is for the airplane(s) shown below.

GROUP CONFIGURATION DESCRIPTION

1 - 777F airplanes with pressurized supernumerary oxygen systems.

2 - 777F airplanes which have incorporated service bulletin 777-35-0025.

Airplane Models:

777F

Variable Number Group

WF001 2

WF004 2

WF046 - WF059 1

WF075 1

WF121 1

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2. Spares Affected

None.

B. Concurrent Requirements

None.

C. Reason

The changes provided in this service bulletin will help prevent damage to the low pressure oxygen

hoses that may be subjected to electrical current. An electrical current condition in the low pressure

oxygen hose can cause the low pressure oxygen hose to melt or burn. This could result in smoke

and/or fire in the supernumerary area.

This service bulletin will replace low pressure oxygen hoses with non-conductive low pressure oxygen

hoses located in the supernumerary area. The replacement of the low pressure oxygen hoses will

prevent electrical current from passing through the low pressure oxygen hose internal anti-collapse

spring which can cause the low pressure oxygen hose to melt or burn.

Revision 01 is sent to correct the reference to the part numbers of the low pressure oxygen hoses in

Figure 1.

Boeing Service Related Problem (SRP) 777-SRP-35-0050 is related to this service bulletin.

D. Description

Remove the stowage boxes for the oxygen masks. Remove ceiling panels. Replace the existing low

pressure oxygen hoses with the new non-conductive low pressure oxygen hoses. Perform a leak test.

Revision 01 - More work is necessary on the airplane(s) changed in accordance with the original issue

of this service bulletin which did not remove low pressure oxygen hoses 57034-08A050140 and did

not install non-conductive low pressure oxygen hoses 57034-33N040140. These airplanes must replace

the low pressure oxygen hose assemblies in accordance with Figure 1. No more work is necessary on

the airplane(s) changed in accordance with the original issue of this service bulletin if low pressure

oxygen hoses 57034-08A050140 were removed and non-conductive low pressure oxygen hoses

57034-33N040140 were installed.

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

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

Affected Maintenance Zones

Model Zone

777F 215, 216

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.

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
Boeing recommends that the change given in this service bulletin be done within 36 months after the

original issue date of 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.

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 inspect the work

• Time to cure the materials

• Time to make the parts

• Time to find the tools.

Task Number of Persons Task Hours Elapsed Hours

Open Access 1 0.25 0.25

FIGURE 1 1 2.75 2.75

FIGURE 2 1 1.25 1.25

Test 1 0.35 0.35

FIGURE 3 1 1.75 1.75

Close Access 1 0.25 0.25

TOTAL FOR EACH AIRPLANE 6.60 6.60

H. Weight and Balance Changes

None.

I. Electrical Load Data

Not changed.

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
J. References

1. Existing Data:

a. Boeing Service Related Problem (SRP) 777-SRP-35-0050

b. Standard Overhaul Practices Manual (SOPM) 20-50-10, 20-70-01

c. 777 Aircraft Maintenance Manual (AMM) 25-21-07, 35-00-00, 35-23-15

2. Data Supplied with this Service Bulletin:

None.

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

Drawing Number Title

413W1100 Ceiling Installation - Section 41, Lowered Ceiling

435W5101 Stowage Installation - Ceiling Mounted

474W2020 Flex Hose Installation - Gaseous Oxygen, Supernumerary

474W2630 Oxygen Box Installation, Supernumerary

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 35-23

777 Illustrated Parts Catalog 11-32, 23-42, 25-28, 33-23, 35-23

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

Not affected.

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
2. MATERIAL INFORMATION

A. Material - Price and Availability

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

are encouraged to share schedule requirements with Boeing for incorporation of the service bulletin.

The kits are subject to the terms and conditions of the Boeing standard purchase order acknowledgment.

Prices are in United States Dollars. Terms: Net 30 days.

Reference this service bulletin and submit your purchase order by one of these methods:

1. Order on-line via ATA Spec 2000 or The Boeing PART Page

2. Fax to (206) 662-7145

REFER TO THE BOEING PART PAGE ON MYBOEINGFLEET.COM OR CONTACT FIRST RESPONDER

AT FR@BOEING.COM FOR THE LATEST REORDER LEAD TIME (ROLT) AND PRICE INFORMATION

Unit Price as of

the original issue

date of this Service Bulletin (US

Dollars)

ROLT as of the

original issue

date of this Service Bulletin (Calendar Days)

Kit Number Name Date QTY

005W3542-1 Top Kit 7/10/2012 12 139 1450.00

B. Industry Support Information

Boeing warranty remedies are available for 777 airplanes in warranty as of September 30, 2011. For

task hour reimbursement for airplanes in warranty as of that date, send a warranty claim to Boeing

Commercial Airplanes Group - Warranties. The kits for airplanes in warranty as of that date will be

supplied at no charge. Send a purchase order for the kits to Boeing Spares. Please refer to this service

bulletin number and reference the airplane variable numbers in your purchase order.

C. Parts Necessary for Each Airplane

1. Kits/Parts

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

NOTE: One top kit and the items shown in Paragraph 2.C.2., Parts are necessary for each

airplane. The Top Kit is divided into Figure kits for each installation figure shown in the

table below.

Figure Kit

Top Kit 1 2

005W3542-1 1 1

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
ALL

KIT 005W3542-1

Notes

Existing Part

Name Number

Figure

New Part Number

1 2

Qty

57034-33N040140 4 . HOSE ASSY 57034-08A050140 (a) (b)

57034-33N040215 . 2 HOSE ASSY 57034-08A050215 (a) (b)

57034-34N040270 . 1 HOSE ASSY 57034-09A050270 (a) (b)

(a) This part is used in production.

(b) You cannot use the existing part to replace the new or changed part.

2. Parts and Materials Supplied by the Operator

None.

3. Parts Modified and Reidentified

The parts shown below are changed as shown in this service bulletin. The quantity (QTY) is the

number of parts changed on each airplane.

Existing Part QTY Name New Part Number Notes

Number

Stowage Assembly - - (a) (b) (c)

Ceiling Mounted

435W5100-7B 1

Stowage Assembly - - (a) (b) (d)

Ceiling Mounted

435W5100-8B 1

(a) Make the change in accordance with this service bulletin.

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

the change done in accordance with this service bulletin was made.

(c) The equivalent production part number is 435W5100-17B.

(d) The equivalent production part number is 435W5100-18B.

4. Parts Removed and Not Replaced

None.

D. Parts Necessary to Change Spares

None.

E. Special Tooling - Price and Availability

None.

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
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 777-35A0029

ALERT ALERT

BLANK PAGE
3. ACCOMPLISHMENT INSTRUCTIONS

A. GENERAL INFORMATION

CAUTION: READ AND OBEY THE SAFETY PRECAUTIONARY AND GENERAL INSTRUCTIONS

FOR THE OXYGEN SYSTEM BEFORE YOU DO THE MAINTENANCE. REF TO 777

AMM 35-00-00 AS AN ACCEPTED PROCEDURE.

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. Unless shown differently, these dimensions and tolerances are used:

– Linear dimensions are in inches

– Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus

or minus 0.03 inch

– Torque limits to tighten nuts and bolts are in SRM Chapter 51

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. If it is necessary to remove more parts for access, you can remove those parts. If

you can get access without removing identified parts, it is not necessary to remove

all of the identified parts. Jacking and shoring limitations must be observed.

6. Where the work instructions include installation of a kept part, a new or serviceable

part with the same part number can be installed as an alternative to the kept part.

7. 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.

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ALERT ALERT
B. WORK INSTRUCTIONS

WARNING: DO NOT PERMIT OIL, GREASE, DIRT OR OTHER FLAMMABLE MATERIALS TO GET

NEAR THE PRESSURE OXYGEN SYSTEM. THESE MATERIALS CAN CAUSE A FIRE

OR AN EXPLOSION WHEN THEY ARE NEAR PRESSURIZED OXYGEN.

CAUTION: SPECIAL CARE MUST BE USED WHEN OXYGEN COMPONENTS ARE HANDLED

AND WORKED WITH. BEFORE WORK IS DONE OF THE OXYGEN SYSTEM, READ

THE SAFETY AND MAINTENANCE PROCEDURES. REFER TO 777 AMM 35-00-00

AND SOPM 20-70-01 AS ACCEPTED PROCEDURES.

CAUTION: USE ONLY OXYGEN CLEAN COMPONENTS IN THE OXYGEN SYSTEM. IF YOU DO

NOT USE OXYGEN CLEAN COMPONENTS, A FIRE OR EXPLOSION CAN OCCUR.

THIS CAN CAUSE DAMAGE TO EQUIPMENT OR INJURIES TO PERSONS.

CAUTION: MAXIMUM PERMITTED OPEN TIME FOR OXYGEN TUBES, HOSES AND

COMPONENTS IS 5 MINUTES.

CAUTION: KEEP A GAP BETWEEN THE ELECTRICAL WIRING AND THE OXYGEN HOSES TO

PREVENT CHAFFING. THIS CAN CAUSE DAMAGE TO THE ELECTRICAL WIRING

OR OXYGEN HOSES. REFER TO 777 AMM 35-00-00 AS AN ACCEPTED PROCEDURE.

1. Replace stowage box low pressure oxygen hoses in accordance with FIGURE 1.

2. Replace low pressure oxygen hoses in the supernumerary ceiling area in accordance with FIGURE

2.

3. Perform leak test. Refer to 777 AMM 35-00-00 as an accepted procedure.

4. Restore supernumerary interior in accordance with FIGURE 3.

5. Put the airplane back into a serviceable condition.

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
FIGURE 1: STOWAGE BOX LOW PRESSURE OXYGEN HOSE REPLACEMENTS

(SHEET 1 OF 3)

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
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 each airplane.

Step Task Name Identification Qty More Data

Refer to 777 AMM

35-23-15 as an accepted procedure.

Oxygen masks do

not need to be removed.

STOWAGE BOX AS- - 4

SEMBLY

1 Remove / Keep

Refer to 777 AMM

35-00-00 as an accepted procedure.

2 Remove HOSE ASSY 57034-08A050140 4

FIGURE 1: STOWAGE BOX LOW PRESSURE OXYGEN HOSE REPLACEMENTS

(SHEET 2 OF 3)

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ALERT ALERT
Step Task Name Identification Qty More Data

Refer to 777 AMM

35-00-00 as an accepted procedure.

Refer to APPENDIX

A for more information.

3 Install (New) HOSE ASSY 57034-33N040140 4

Temporary install

Stowage Box. (a)

STOWAGE BOX AS- - 4

SEMBLY

4 Install (Temporary)

Mark on a non-decorative surface that

the service bulletin

has been done. Refer to SOPM 20-50-

10 Code M as an

accepted procedure.

STOWAGE ASSEM- - -

BLY - CEILING

MOUNTED

5 Identify

(a) Final installation will be done after the leak test.

FIGURE 1: STOWAGE BOX LOW PRESSURE OXYGEN HOSE REPLACEMENTS

(SHEET 3 OF 3)

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
FIGURE 2: LOW PRESSURE OXYGEN HOSE REPLACEMENTS

(SHEET 1 OF 3)

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
FIGURE 2: LOW PRESSURE OXYGEN HOSE REPLACEMENTS

(SHEET 2 OF 3)

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
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 each airplane.

Step Task Name Identification Qty More Data

Refer to 777 AMM

25-21-07as an accepted procedure.

1 Remove / Keep CEILING PANELS - -

Refer to 777 AMM

35-00-00 as an accepted procedure.

2 Remove HOSE ASSY 57034-08A050215 2

Refer to 777 AMM

35-00-00 as an accepted procedure.

3 Install (New) HOSE ASSY 57034-33N040215 2

Refer to 777 AMM

35-00-00 as an accepted procedure.

4 Remove HOSE ASSY 57034-09A050270 1

Refer to 777 AMM

35-00-00 as an accepted procedure.

5 Install (New) HOSE ASSY 57034-34N040270 1

FIGURE 2: LOW PRESSURE OXYGEN HOSE REPLACEMENTS

(SHEET 3 OF 3)

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
FIGURE 3: SUPERNUMERARY INTERIOR RESTORATION

(SHEET 1 OF 2)

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
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 each airplane.

Step Task Name Identification Qty More Data

Refer to 777 AMM

25-21-07as an accepted procedure.

1 Install (Kept) CEILING PANELS - -

Refer to 777 AMM

35-23-15 as an accepted procedure.

STOWAGE BOX AS- - 4

SEMBLY

2 Install (Kept)

FIGURE 3: SUPERNUMERARY INTERIOR RESTORATION

(SHEET 2 OF 2)

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT
1. Torque B-Nut to 190 + 2/- 9 inch-lbs. Refer to 777 AMM 35-00-00 as an accepted procedure.

2. Ensure a 0.002 inch minimum clearance between B-Nut and Stowage Box fitting. See the figure below.

APPENDIX A: OXYGEN HOSE TO STOWAGE BOX INSTALLATION

(SHEET 1 OF 1)

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BOEING SERVICE BULLETIN 777-35A0029

ALERT ALERT