# Boeing Alert Service Bulletin 767-35A0057: Revision 1

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- Title as filed: U.S. DOT/FAA - Service Information - 3
- Pages: 23
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Commercial 
Airplanes
767
Service Bulletin
ALERT
Number: 767-35A0057
Original Issue: October 08, 2009
Revision 1: November 17, 2011
ATA System: 3511
SUBJECT: OXYGEN - Crew Oxygen System - Crew Oxygen Mask Stowage Box Unit -
Inspect/Replace
Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15
CFR 730-774). 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.
9E991ECCN:
BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET
Copyright © 2009 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Unpublished Work - All Rights Reserved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, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner,
BBJ, DC-8, DC-9, DC-10, KC-10, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and the
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Table of Contents
Revision Transmittal Sheet ............................................ 5
Summary ...................................................... 7
1. PLANNING INFORMATION ........................................ 1 1
A. Effectivity ............................................... 1 1
1. Airplanes ............................................ 1 1
2. Spares Affected ........................................ 1 1
B. Concurrent Requirements ...................................... 1 2
C. Reason ................................................ 1 2
D. Description .............................................. 1 2
E. Compliance .............................................. 1 2
F. Approval ............................................... 1 3
G. Manpower .............................................. 1 3
H. Weight and Balance Changes .................................... 1 3
I. Electrical Load Data ......................................... 1 4
J. References .............................................. 1 4
1. Existing Data .......................................... 1 4
2. Data supplied with this Service Bulletin ............................ 1 4
3. Installation Drawings Used in the Preparation of this Service Bulletin ............ 1 4
K. Publications Affected ........................................ 1 4
L. Interchangeability and Intermixability of Parts ........................... 1 4
2. MATERIAL INFORMATION ........................................ 1 5
A. Material - Price and Availability ................................... 1 5
B. Industry Support Information .................................... 1 5
C. Parts Necessary For Each Airplane ................................. 1 5
1. Kits/Parts ............................................ 1 5
2. Parts and Materials Supplied by the Operator ........................ 1 5
3. Parts Modified and Reidentified ................................ 1 5
4. Parts Removed and Not Replaced .............................. 1 6
D. Parts Necessary to Change Spares ................................. 1 6
E. Special Tooling - Price and Availability ............................... 1 6
F. Special Tooling Necessary to do this Service Bulletin ....................... 1 6
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 1 7
A. GENERAL INFORMATION ..................................... 1 7
B. WORK INSTRUCTIONS ....................................... 1 8
FIGURE 1: FLIGHT COMPARTMENT - CREW OXYGEN MASK STOWAGE BOX UNIT - INSPECTION
.................................................. 2 0
FIGURE 2: FLIGHT COMPARTMENT - CREW OXYGEN MASK STOWAGE BOX UNIT - REPLACEMENT
.................................................. 2 2
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Commercial 
Airplanes
767
Service Bulletin
ALERT
Revision Transmittal SheetNumber: 767-35A0057Original Issue: October 08, 2009
Revision 1: November 17, 2011
ATA System: 3511
SUBJECT: OXYGEN - Crew Oxygen System - Crew Oxygen Mask Stowage Box Unit -
Inspect/Replace
This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION
More work is necessary on airplanes inspected in accordance with the original issue of this service bulletin that
did not have affected serial numbers. Verify maintenance inspection records or re-inspect the crew oxygen mask
stowage box units in accordance with Zodiac Services (Intertechnique) Service Bulletin MXP1/4-35-175 R02.
More work is necessary on the airplanes inspected in accordance with the original issue of this service bulletin
that have changed crew oxygen mask stowage box units. Re-inspect in accordance with Zodiac
Services(Intertechnique) Service Bulletin MXP1/4-35-175 R02.
REASON FOR REVISION
Revision 1 is sent to perform a General Visual Inspection for affected serial numbers in accordance with revision
02 of Zodiac Services (Intertechnique) Service Bulletin MXP1/4-35-175 and change the serial number of inspected
crew oxygen mask stowage box units.
This revision is set to make the changes below:
1. Replaced references to Intertechnique (Avox-Eros Services, INC), Service Bulletin MXP1/4-35-175, Rev 0
with references to Zodiac Services (Intertechnique) Service Bulletin MXP1/4-35-175, Rev 02.
2. Summary:
– Compliance: Added FAA Notice of Proposed Rule Making 2010-NM-094-AD.
– Industry Support Information: Included reference to Zodiac Services (Intertechnique) Service
BulletinMXP1/4-35-175, Rev 02.
3. Part 1. B., Concurrent Requirements: Updated to show current supplier service bulletin, MXP1/4-35-175
as Revision 02.
4. Part 1. C., Reason: Added identification of the reason for revision 1.
5. Part 1. D., Description: Added information that additional work is needed for airplanes that have accomplished
the original issue of this service bulletin.
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6. Part 1. E., Compliance: Added FAA Notice of Proposed Rule Making 2010-NM-094-AD.
7. Part 1. J., References: Updated the revision level of the supplier service bulletin and added FAA Notice of
Proposed Rule Making 2010-NM-094-AD.
8. Part 3. Accomplishment Instructions, B., Work Instructions:
– Step 2, Part (a.), changed "Go to step 7" to "Go to step 11" and added steps.
– Added Step 3, Close the valve on the crew oxygen cylinder.
– Step 10, Added " If not previously accomplished".
9. Figure 1, changed footnotes (b) and (c).
10. Figure 2, added footnote (c).
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.
REVISION HISTORY
October 08, 2009Original Issue:
November 17, 2011Revision 1:
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Commercial 
Airplanes
767
Service Bulletin
ALERT
SummaryNumber: 767-35A0057Original Issue: October 08, 2009
Revision 1: November 17, 2011
ATA System: 3511
SUBJECT: OXYGEN - Crew Oxygen System - Crew Oxygen Mask Stowage Box Unit -
Inspect/Replace
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
Refer to Paragraph 1.B., Concurrent Requirements.
BACKGROUND
Boeing has been notified by the supplier that a limited quantity of crew oxygen mask stowage box units, part
number MXP147, manufactured between 12 July 2007 and 20 November 2007, were possibly delivered with a
burr in the inlet fitting. This burr may break loose during test or operation and may pose an ignition source or
cause an inlet valve to jam restricting the flow of oxygen. If this service bulletin is not accomplished, a burr may
break loose during test or operation and pose an ignition source or cause an inlet valve to jam, restricting the
flow of oxygen.
Boeing Service Related Problem (SRP) 767-SRP-35-0044 is related to this service bulletin.
ACTION
Perform a General Visual Inspection of the crew oxygen mask stowage box units. The crew oxygen mask
stowage box units do not need to be fully removed to do the inspection. Loosen the four quarter turn fasteners
and lift the crew oxygen mask stowage box unit enough to read the serial number. Perform a General Visual
Inspection for affected serial numbers identified in the Zodiac Services (Intertechnique) service bulletin,
MXP1/4-35-175 Rev 02.
Crew oxygen mask stowage box units that do not have affected serial numbers require no further action. Stow
the crew oxygen mask stowage box unit. Tighten the four quarter turn fasteners.
Crew oxygen mask stowage box units that have affected serial numbers are to be replaced. Perform functional
testing on all replaced crew oxygen mask stowage box units.
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Crew oxygen mask stowage box units that have been inspected in accordance with the original issue of this
service bulletin that did not have affected serial numbers require verification of maintenance records inspection
or re-inspection of the crew oxygen mask stowage box unit in accordance with Zodiac Services
(Intertechnique)service bulletin MXP1/4-35-175 R02.
EFFECTIVITY
767-200, -300 Airplanes. Refer to Paragraph 1.A.1., Airplanes for the list of affected airplanes.
COMPLIANCE
Federal Aviation Administration (FAA) Notice of Proposed Rule Making 2010-NM-094-AD, is related to this
service bulletin.
Boeing recommends that the inspection and any applicable replacement given in this service bulletin be done
within 24 months after the original issue date of this service bulletin.
INDUSTRY SUPPORT INFORMATION
Boeing warranty remedies are not available for the operator action(s) given in this service bulletin. Please refer
to Zodiac Services (Intertechnique), Service Bulletin MXP1/4-35-175, Rev 02 for more information.
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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Commercial 
Airplanes
767
Service Bulletin
ALERT
Number: 767-35A0057
Original Issue: October 08, 2009
Revision 1: November 17, 2011
ATA System: 3511
SUBJECT: OXYGEN - Crew Oxygen System - Crew Oxygen Mask Stowage Box Unit -
Inspect/Replace
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
This service bulletin is for the airplanes shown below.
Refer to Service Bulletin Index Document D624T001 Part 3 for Airplane Variable Number, Line
Number, and Serial Number data.
DESCRIPTIONCONFIGURATIONGROUP
767-200/-300 Airplanes-1
Airplane Models:
767-200, 767-300
GroupVariable Number
1VR108
1VS907
2. Spares Affected
Examine your spares supply for the parts or components identified in Paragraph 2.C., Parts
Necessary for Each Airplane. If any parts or components are found, refer to Paragraph 2.C. for
the recommended use.
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B. Concurrent Requirements
The service bulletin listed below must be done before or at the same time as this service bulletin:
DescriptionService BulletinCompany
Provides inspection information and list of
affected serial numbers.
MXP1/4-35-175, Rev. 02Zodiac Services
(Intertechnique)
C. Reason
Boeing has been notified by the supplier that a limited quantity of crew oxygen mask stowage box units,
part number MXP147, manufactured between 12 July 2007 and 20 November 2007, were possibly
delivered with a burr in the inlet fitting. This burr may break loose during test or operation and may
pose an ignition source or cause an inlet valve to jam restricting the flow of oxygen. If this service
bulletin is not accomplished, a burr may break loose during test or operation and pose an ignition source
or cause an inlet valve to jam, restricting the flow of oxygen.
Boeing Service Related Problem (SRP) 767-SRP-35-0044 is related to this service bulletin.
Revision 1 is sent to add a crew oxygen mask stowage box unit inspection in accordance with revision
02 of Zodiac Services (Intertechnique) Service Bulletin MXP1/4-35-175.
D. Description
Perform a General Visual Inspection of the crew oxygen mask stowage box units. The crew oxygen
mask stowage box units do not need to be fully removed to do the inspection. Loosen the four quarter
turn fasteners and lift the crew oxygen mask stowage box unit enough to read the serial number.
Perform a General Visual Inspection for affected serial numbers identified in the Zodiac Services
(Intertechnique) service bulletin, MXP1/4-35-175 Rev 02.
Crew oxygen mask stowage box units that do not have affected serial numbers require no further
action. Stow the crew oxygen mask stowage box unit. Tighten the four quarter turn fasteners.
Crew oxygen mask stowage box units that have affected serial numbers are to be replaced. Perform
functional testing on all replaced crew oxygen mask stowage box units.
More work is necessary on airplanes changed in accordance with the original issue of this service
bulletin to inspect the crew oxygen mask stowage box unit in accordance with revision 02 of Zodiac
Services (Intertechnique) Service Bulletin MXP1/4-35-175.
The work in this service bulletin is done in the maintenance zone(s) given below.
Affected Maintenance Zones
ZoneModel
211, 212767-200, 767-300
E. Compliance
Federal Aviation Administration (FAA) Notice of Proposed Rule Making 2010-NM-094-AD, is related
to this service bulletin.
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Boeing recommends that the inspection and any applicable replacement given in this service bulletin
be done within 24 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 inspection for each crew
oxygen mask stowage box unit. 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 find the tools.
Elapsed HoursTask HoursNumber of PersonsTask
0.250.251Open Access
0.750.751Figure 1
1.001.001Figure 2
1.501.501Test
1.001.001Close Access
2.00 (b)2.00 (b)INSPECTION ONLY TOTAL FOR EACH
AIRPLANE
4.50 (a), (b)4.50 (a), (b)INSPECTION AND REPLACEMENT TOTAL
FOR EACH AIRPLANE
(a) The time to package and return the affected crew oxygen mask stowage box unit in accordance
with Zodiac Services (Intertechnique), Service Bulletin MXP1/4-35-175 Rev 02 is not included.
(b) The time to perform the General Visual Inspection in accordance with Zodiac Services
(Intertechnique), Service Bulletin MXP1/4-35-175 Rev 02 is not included.
H. Weight and Balance Changes
None.
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I. Electrical Load Data
Not changed.
J. References
1. Existing Data
a. Service Related Problem (SRP) 767-SRP-35-0044
b. 767 Aircraft Maintenance Manual (AMM) 23-51-00, 35-00-00, 35-11-00, 35-11-51, 52-51-00
c. Standard Overhaul Practices Manual (SOPM) 20-70-01
d. Zodiac Services (Intertechnique), Service Bulletin MXP1/4-35-175, Rev. 02
NOTE: The supplier was told to send copies of the service bulletin to each operator.
e. FAA Notice of Proposed Rule Making 2010-NM-094-AD.
2. Data supplied with this Service Bulletin
None.
3. Installation Drawings Used in the Preparation of this Service Bulletin
TitleDrawing Number
EQUIPMENT INSTALLATION - CREW OXYGEN232T8002
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
1. Publications:
None.
2. Damage Tolerance Based Structural Inspections:
Boeing has evaluated 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
Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts.
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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. Refer to Zodiac Services (Intertechnique) service bulletin, MXP1/4-35-175 Rev 02.
B. Industry Support Information
Boeing warranty remedies are not available for the operator action(s) given in this service bulletin.
Please refer to Zodiac Services (Intertechnique), Service Bulletin MXP1/4-35-175, Rev 02 for more
information.
C. Parts Necessary For Each Airplane
1. Kits/Parts
None.
2. Parts and Materials Supplied by the Operator
NotesNameQTYPart Number /
Specification
(c), (a), (e)Crew oxygen mask stowage box unit3Part number
MXP147
(b), (d)Cap - Protective, Aluminum, Flare-
less Tube
1-3BACC14AG5
(b), (d)Plug - Protective, Aluminum, Flare-
less Tube
1-3BACP20BG5
(a) Package and return affected serial number crew oxygen mask stowage box units in ac-
cordance with Zodiac Services (Intertechnique) Service Bulletin MXP1/4-35-175 Rev 02.
(b) The quantity can vary depending on the work sequence. The maximum is listed for con-
current accomplishment of all crew oxygen mask stowage box units. One is required if
work is done in serial.
(c) Intertechnique, 61 Rue Pierre Curie, Boite Postale 1, 78734 Plaisir Cedex, France, Cage
Code F5341, Phone: 01 30 54 82 00. (Avox-Eros Services, INC., 6734 Valjean Avenue,
Van Nuys, CA., 91406-5818, Cage Code 55912, Phone: 818-435-0945, Fax: 818-435-
0995.)
(d) Caplugs LLC., DBA Mokon Div Caplugs, 2150 Elmwood Ave., Buffalo, NY., 14207-7198,
Cage Code 99017, Phone: 716-876-9855, Fax: 716-874-1680.
(e) Crew oxygen mask stowage box units can be ordered from Zodiac Services (Intertech-
nique) per service bulletin, MXP1/4-35-175 Rev 02.
3. Parts Modified and Reidentified
See Zodiac Services (Intertechnique) Service Bulletin MXP1/4-35-175, Rev 02.
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4. Parts Removed and Not Replaced
None.
D. Parts Necessary to Change Spares
Boeing has canvassed Boeing Spares and Operator Spares inventory and determined there to be
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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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. A General Visual Inspection is defined as: A visual examination of an interior or
exterior area, installation or assembly to detect obvious damage, failure or irregularity.
This level of inspection is made from within touching distance unless otherwise
specified. A mirror may be necessary to enhance visual access to all exposed surfaces
in the inspection area. This level of inspection is made under normally available
lighting conditions such as daylight, hangar lighting, flashlight or drop-light and may
require removal or opening of access panels or doors. Stands, ladders or platforms
may be required to gain proximity to the area being checked.
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.
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B. WORK INSTRUCTIONS
WARNING: MAKE SURE THAT THE OXYGEN SYSTEM IS DEACTIVATED AND THE OXYGEN
CYLINDERS ARE FULLY CLOSED. IF THE OXYGEN SYSTEM IS NOT DEACTIVATED
AND THE OXYGEN CYLINDERS ARE NOT FULLY CLOSED, THE OXYGEN SYSTEM
MAY BE PRESSURIZED. IF WORK IS DONE ON A PRESSURIZED OXYGEN SYSTEM,
INJURY TO PERSONNEL OR DAMAGE TO EQUIPMENT CAN OCCUR.
WARNING: CLOSE THE SHUTOFF VALVE ON THE CREW OXYGEN CYLINDERS SLOWLY. FIRE
CAN RESULT IF VALVE IS CLOSED TOO QUICKLY. THIS CAN CAUSE INJURY TO
PERSONS AND DAMAGE TO THE AIRPLANE AND EQUIPMENT.
CAUTION: DO NOT TIGHTEN THE SHUTOFF VALVE ON THE CREW OXYGEN CYLINDERS
MORE THAN 25 POUND-INCHES. THIS CAN CAUSE DAMAGE TO THE SHUTOFF
VALVE.
CAUTION: MAXIMUM PERMITTED OPEN TIME FOR OXYGEN TUBES, HOSES AND
COMPONENTS IS 5 MINUTES.
CAUTION: OXYGEN SYSTEM COMPONENTS REQUIRE SPECIAL CARE AND HANDLING
PROCEDURES. REVIEW THE SAFETY AND MAINTENANCE PROCESSES SHOWN
IN 767 AMM 35-00-00 PRIOR TO MAKING ANY CHANGES TO THE OXYGEN SYSTEM.
1. Open access to flight compartment, refer to 767 AMM 52-51-00 as an accepted procedure.
2. Perform a General Visual Inspection of the crew oxygen mask stowage box units in accordance
with Figure 1.
– (a.) No more work is required for crew oxygen mask stowage box units that do not have
affected serial numbers. Return the crew oxygen mask stowage box unit to its installed position
and tighten the four quarter turn fasteners on the crew oxygen mask stowage box unit. Go to
step 11.
– (b.) Crew oxygen mask stowage box units that have affected serial numbers require
replacement. Go to step 3.
– (c.) Crew oxygen mask stowage box units that have affected serial numbers which were
changed in accordance with the original issue of this service bulletin require additional work.
Accomplish Zodiac Services (Intertechnique) service bulletin MXP1/4-35-175 R02.
3. Open access to the crew oxygen cylinders. Close the shutoff valve.
4. Detach crew oxygen mask from the affected crew oxygen mask stowage box unit, retain for
re-installation. Refer to 767 AMM 35-11-51 as an accepted procedure.
5. Replace affected crew oxygen mask stowage box units in accordance with Figure 2.
NOTE: The oxygen supply line hose and wire bundle length will allow pulling the crew oxygen
mask stowage box unit up onto the console before the disconnections are made.
BOEING PROPRIETARY -
Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 08, 2009
767-35A0057Revision 1: November 17, 2011
18 of 23
BOEING SERVICE BULLETIN 767-35A0057
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### Page 19

WARNING: OPEN THE SHUTOFF VALVE ON THE CREW OXYGEN CYLINDERS SLOWLY. FIRE
CAN RESULT IF VALVE IS OPENED TOO QUICKLY. THIS CAN CAUSE INJURY TO
PERSONS AND DAMAGE TO THE AIRPLANE AND EQUIPMENT.
CAUTION: DO NOT TIGHTEN THE SHUTOFF VALVE ON THE CREW OXYGEN CYLINDERS
MORE THAN 25 POUND-INCHES. THIS CAN CAUSE DAMAGE TO THE SHUTOFF
VALVE.
6. Re-attach the crew oxygen mask to the crew oxygen mask stowage box unit and tighten the four
quarter turn fasteners on the crew oxygen mask stowage box unit. Refer to 767 AMM 35-11-51
as an accepted procedure.
7. Slowly turn the crew oxygen cylinder shutoff valve until fully opened.
8. Close crew oxygen cylinder shutoff valve one-fourth of a turn. Install Lock wire on the shutoff
valves.
9. Close access to the crew oxygen cylinders.
10. Perform oxygen system testing:
– If not previously accomplished, do a crew oxygen system pressure indication test refer to 767
AMM 35-11-00 as an accepted procedure.
– If not previously accomplished, do a crew oxygen high pressure leakage test refer to 767
AMM 35-11-00 as an accepted procedure.
– If not previously accomplished, do a crew oxygen stowage box test refer to 767 AMM 35-11-00
as an accepted procedure.
– If not previously accomplished, do a crew oxygen mask/regulator test refer to 767 AMM
35-11-00 as an accepted procedure.
– If not previously accomplished, verify the oxygen mask microphone test has been completed
refer to 767 AMM 23-51-00 part g as an accepted procedure.
11. Close access to flight compartment, refer to 767 AMM 52-51-00 as an accepted procedure.
12. Put the airplane back to a serviceable condition.
BOEING PROPRIETARY -
Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 08, 2009
767-35A0057Revision 1: November 17, 2011
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BOEING SERVICE BULLETIN 767-35A0057
ALERTALERT

### Page 20 (OCR)

BOEING SERVICE BULLETIN 767-35A0057
ALERT  ALERT
FLIGHT COMPARTMENT
SERIAL NUMBER (2
TYPICAL  TYPICAL
FIGURE 1: FLIGHT COMPARTMENT - CREW OXYGEN MASK STOWAGE BOX UNIT - INSPECTION
(SHEET 1 OF 2)
Original Issue: October 08, 2009
Revision 1 November 17, 2011  Copyright © Unpublished Work - See page 1 for details.  BOEING PROPRIETARY -  767-35A0057  20 of 23

### Page 21

MORE DATAQTYIDENTIFICATIONNAMETASKSTEP
(a)4MXP147CREW OXYGEN
MASK STOWAGE BOX
UNIT
Loosen1
(b), (c)4MXP147CREW OXYGEN
MASK STOWAGE BOX
UNIT
Inspect2
(a) The four quarter turn fasteners on the crew oxygen mask stowage box unit.
(b) General Visual Inspection for affected part number with serial numbers in accordance with Zodiac Services
(Intertechnique) service bulletin MXP1/4-35-175 Rev 02.
(c) The serial number tag is on the forward side of the crew oxygen stowage box unit. The number can be
read when lifting the box up to expose it. It is not necessary to detach the supply line.
FIGURE 1: FLIGHT COMPARTMENT - CREW OXYGEN MASK STOWAGE BOX UNIT - INSPECTION
(SHEET 2 OF 2)
BOEING PROPRIETARY -
Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 08, 2009
767-35A0057Revision 1 November 17, 2011
21 of 23
BOEING SERVICE BULLETIN 767-35A0057
ALERTALERT

### Page 22 (OCR)

BOEING SERVICE BULLETIN 767-35A0057
ALERT  ALERT
B
FLIGHT COMPARTMENT
TYPICAL  1863937
FIGURE 2: FLIGHT COMPARTMENT - CREW OXYGEN MASK STOWAGE BOX UNIT - REPLACEMENT
(SHEET 1 OF 2)
Original Issue: October 08, 2009
Revision 1 November 17, 2011  BOEING PROPRIETARY -
Copyright © Unpublished Work - See page 1 for details.

### Page 23

WARNING: DO NOT WORK ON THE PRESSURIZED OXYGEN SYSTEM WHEN THERE IS OIL, GREASE,
FLAMMABLE SOLVENTS, LINT, METAL FILINGS, OR OTHER COMBUSTIBLE MATERIALS IN
THE AREA. THESE MATERIALS CAN CAUSE A FIRE OR AN EXPLOSION WHEN THEY ARE
NEAR PRESSURIZED OXYGEN. REFER TO 767 MAINTENANCE MANUAL SUBJECTS 35-00-00
AND 35-11-00 AS ACCEPTED PROCEDURES.
CAUTION: OXYGEN SYSTEM COMPONENTS REQUIRE SPECIAL HANDLING AND PROCESSING.
RETURN ANY CONTAMINATED EQUIPMENT TO VENDOR.
CAUTION: OPEN EXPOSURE OF THE OXYGEN SYSTEM IS TO BE KEPT TO A MINIMUM. TO PROTECT
THE INTEGRITY OF THE OXYGEN SYSTEM, COVER AND SEAL OPEN LINES WITH SUITABLE
PLASTIC BAG, CAP, OR PLUG.
MORE DATAQTYIDENTIFICATIONNAMETASKSTEP
(a), (c)3MXP147CREW OXYGEN
MASK STOWAGE BOX
UNIT
Remove1
(a), (b), (c)3MXP147CREW OXYGEN
MASK STOWAGE BOX
UNIT
Install (Changed)2
(a) Refer to 767 AMM 35-11-51 as an accepted procedure.
(b) If the oxygen flex hose that attaches at the bottom of the crew oxygen mask stowage box unit is not to
be connected to the new crew oxygen mask stowage box unit within 5 minutes, refer to 767 AMM 35-00-
00 and SOPM 20-70-01 as accepted procedures.
(c) Refer to Zodiac Services (Intertechnique) Service Bulletin MXP1/4-35-175, Rev 02 for detailed instructions.
FIGURE 2: FLIGHT COMPARTMENT - CREW OXYGEN MASK STOWAGE BOX UNIT - REPLACEMENT
(SHEET 2 OF 2)
BOEING PROPRIETARY -
Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 08, 2009
767-35A0057Revision 1 November 17, 2011
23 of 23
BOEING SERVICE BULLETIN 767-35A0057
ALERTALERT

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