# Boeing Service Bulletin A3538: No revision named

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- Document: [Boeing Service Bulletin A3538](https://openairdocs.org/service-documents/boeing/a3538.md)
- Title as filed: U.S. DOT/FAA - SB-707-00A3538-00
- Pages: 28
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## Text

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### Page 1

Commercial 
Airplanes
707
Service Bulletin
ALERT
Number: A3538
Original Issue: October 02, 2013
ATA System: 3511 3512
SUBJECT: OXYGEN - Flight Crew Oxygen System - Low Pressure Oxygen Flex 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.
9E991ECCN:
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET
Copyright © 2013 Boeing.
Unpublished Work. All Rights Reserved.
Treatment of this document and its content is governed by contract with Boeing. Rights to use this document
are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The
Boeing Company.
Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner,
BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and
Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in
connection with this document unless provided in writing by Boeing.
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2.0

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Table of Contents
Summary ...................................................... 5
1. PLANNING INFORMATION ........................................ 9
A. Effectivity ................................................ 9
1. Airplanes ............................................. 9
2. Spares Affected ........................................ 1 3
B. Concurrent Requirements ...................................... 1 3
C. Reason ................................................ 1 3
D. Description .............................................. 1 4
E. Compliance .............................................. 1 4
F. Approval ............................................... 1 4
G. Manpower .............................................. 1 4
H. Weight and Balance Changes .................................... 1 5
I. Electrical Load Data ......................................... 1 5
J. References .............................................. 1 5
1. Existing Data: ......................................... 1 5
2. Data Supplied with this Service Bulletin: ........................... 1 5
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 1 5
K. Publications Affected ........................................ 1 6
L. Interchangeability and Intermixability of Parts ........................... 1 6
M. Software Accomplishment Summary ................................ 1 6
2. MATERIAL INFORMATION ........................................ 1 7
A. Material - Price and Availability ................................... 1 7
B. Industry Support Information .................................... 1 7
C. Parts Necessary for Each Airplane ................................. 1 7
1. Kits/Parts ............................................ 1 7
2. Parts and Materials Supplied by the Operator ........................ 1 7
3. Parts Modified and Reidentified ................................ 1 8
4. Parts Removed and Not Replaced .............................. 1 8
D. Parts Necessary to Change Spares ................................. 1 8
E. Special Tooling - Price and Availability ............................... 1 8
F. Special Tooling Necessary to do this Service Bulletin ....................... 1 8
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 1 9
A. GENERAL INFORMATION ..................................... 1 9
B. WORK INSTRUCTIONS ....................................... 1 9
FIGURE 1: FLIGHT COMPARTMENT - CAPTAINS OXYGEN HOSE ASSEMBLY - REPLACEMENT . 21
FIGURE 2: FLIGHT COMPARTMENT - FIRST OFFICERS OXYGEN HOSE ASSEMBLY - REPLACEMENT
.................................................. 2 3
FIGURE 3: FLIGHT COMPARTMENT - OBSERVERS OXYGEN HOSE ASSEMBLY - REPLACEMENT
.................................................. 2 5
FIGURE 4: FLIGHT COMPARTMENT - NAVIGATORS OXYGEN HOSE ASSEMBLY - REPLACEMENT
.................................................. 2 7
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Commercial 
Airplanes
707
Service Bulletin
ALERT
SummaryNumber: A3538Original Issue: October 02, 2013
ATA System: 3511 3512
SUBJECT: OXYGEN - Flight Crew Oxygen System - Low Pressure Oxygen Flex 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 flex hoses
that may be subjected to electrical current. If the changes in this service bulletin are not done, an electrical
grounding condition can result, causing the hose to melt or burn and release smoke and/or fire into the flight
compartment.
This service bulletin will replace low pressure oxygen flex hoses with non-conductive low pressure oxygen flex
hoses located in the flight compartment.
Boeing Service Related Problem (SRP) 707-SRP-35-0050 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 707 FTD 35-12001 is related to this service bulletin.
This table is provided to operators for planning purposes only. Refer to the applicable sections for more
information.
ReferenceAffectedPlanning Data
Paragraph 1.A.2., Spares AffectedYesSpares Affected
Paragraph 1.E., Compliance and Paragraph
1.F., Approval
YesAD Related
Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change
Paragraph 1.I., Electrical Load DataNoElectrical Load Changed
Paragraph 1.K., Publications AffectedYesPublications Affected
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ReferenceAffectedPlanning Data
Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew
Operations Manual and/or FAA Approved Air-
plane Flight Manual)
Paragraph 2.C.1., Kits/PartsNoKits/Parts Required
Paragraph 2.C.2., Parts and Materials Supplied
by the Operator
YesOperator Supplied Material
Paragraph 2.F., Special Tooling Necessary to
do this Service Bulletin
NoSpecial Tooling Required
ACTION (PRR 18115-RS)
Remove applicable ceiling and sidewall lining panels in the flight compartment as needed to gain access to the
affected low pressure oxygen flex hoses and replace conductive hoses with new non-conductive hoses. Perform
leak detection procedure and functional test the oxygen system. Install removed ceiling and sidewall panels as
needed.
EFFECTIVITY
707-100, -100B, -200, -300, -300B, -300C, -400, 720, -720B Airplane(s). Refer to Paragraph 1.A.1., Airplanes,
for the list of affected airplane(s).
COMPLIANCE
The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service
bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin
mandatory.
Boeing recommends that the change given in this service bulletin be done within 36 months after the original
issue date of this service bulletin.
INDUSTRY SUPPORT INFORMATION
Boeing warranty remedies are not available for the configuration changes given in this service bulletin.
MANPOWER
Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION
Operator Supplied Parts/Materials.
Refer to Paragraph 2.C.2., for parts and materials supplied by the operator.
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BOEING SERVICE BULLETIN A3538
ALERT  ALERT
REMOVE
INSTALL  REMOVE
INSTALL
REMOVE
INSTALL
REMOVE
INSTALL
STA
294
STA
251
STA  227  STA  227  INBD
STA  STA
178  178
B
LEFT SIDE  RIGHT SIDE
2199331
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Commercial 
Airplanes
707
Service Bulletin
ALERT
Number: A3538
Original Issue: October 02, 2013
ATA System: 3511 3512
SUBJECT: OXYGEN - Flight Crew Oxygen System - Low Pressure Oxygen Flex 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
This service bulletin is for the airplane(s) shown below. An equivalent change is on subsequent
production airplanes. Refer to PRR 18115-RS for data about this change.
This service bulletin is for the airplane(s) shown below.
Refer to Service Bulletin Index D6-1647 Part 3 for Airplane Variable Number, Line Number, and
Serial Number data.
DESCRIPTIONCONFIGURATIONGROUP
All Airplanes with possible conductive oxygen flex hoses installed-1
Airplane Models:
707-100, 707-100B, 707-200, 707-300, 707-300B, 707-300C, 707-400, 720, 720B
GroupVariable Number
1B0001 - B0029
1B0101 - B0125
1B0201 - B0203
1B0301 - B0306
1B0401 - B0402
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GroupVariable Number
1B0501 - B0515
1B2001 - B2008
1B2091 - B2092
1B2101 - B2116
1B2191 - B2194
1B2199
1B2201 - B2227
1B2401 - B2403
1B2501 - B2502
1B2551 - B2553
1B2601 - B2608
100001 - 00002
100004 - 00006
100101
100103 - 00113
100115 - 00153
100201 - 00205
100301 - 00305
100401 - 00449
100471 - 00475
100501 - 00513
100601
100701 - 00703
102001 - 02020
102101 - 02121
102201 - 02207
102301 - 02303
102401 - 02418
104001 - 04005
104020 - 04022
104101 - 04106
104201 - 04218
104271 - 04272
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GroupVariable Number
104301 - 04303
105001 - 05060
105101 - 05138
105201 - 05208
105301 - 05312
105401
105601 - 05605
105631 - 05635
105701 - 05703
105801 - 05802
105821 - 05827
105831 - 05833
105851 - 05854
105891 - 05892
105921 - 05923
105941 - 05942
105961 - 05970
106001 - 06002
106101
106401 - 06404
106451
106461
107001 - 07017
107041 - 07059
107071 - 07081
107101 - 07109
107181
107191
107201 - 07215
107251 - 07271
107401 - 07407
107451 - 07458
107501 - 07504
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GroupVariable Number
107601 - 07626
107661 - 07662
107681 - 07684
107701 - 07702
107801 - 07821
107901 - 07907
108001 - 08008
108021
108051 - 08056
108071 - 08077
108101 - 08104
108121 - 08129
108141 - 08144
108151 - 08153
108171 - 08173
108191 - 08192
108201 - 08210
108221 - 08224
108241 - 08244
108251
108261
108271
108301 - 08320
108324 - 08330
108333
108401 - 08410
108451 - 08452
108471 - 08475
108501 - 08502
108551 - 08553
108581 - 08582
109001 - 09006
109101 - 09107
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GroupVariable Number
109161 - 09167
109201 - 09204
109221 - 09223
109227
109231 - 09232
109251
109271
109281
109286 - 09290
109411
109421
109438
109441
2. Spares Affected
Examine your spares supply for the parts identified below. If any parts are found, refer to Paragraph
2.C.1., Kits/Parts for the recommended action.
Part Number
10-60174-24 or -36
B. Concurrent Requirements
None.
C. Reason
The changes provided in this service bulletin will help prevent damage to the low pressure oxygen flex
hoses that may be subjected to electrical current. If the changes in this service bulletin are not done,
an electrical grounding condition can result, causing the hose to melt or burn and release smoke and/or
fire into the flight compartment.
This service bulletin will replace low pressure oxygen flex hoses with non-conductive low pressure
oxygen flex hoses located in the flight compartment.
Boeing Service Related Problem (SRP) 707-SRP-35-0050 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 707 FTD 35-12001 is related to this service bulletin.
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D. Description
Remove applicable ceiling and sidewall lining panels in the flight compartment as needed to gain access
to the affected low pressure oxygen flex hoses and replace conductive hoses with new non-conductive
hoses. Install removed ceiling and sidewall panels as needed and functional test the oxygen system.
The work in this service bulletin is done in the maintenance zone(s) given below.
Affected Maintenance Zones
ZoneModel
2-21, 2-22, 2-23707-100, 707-100B, 707-200,
707-300, 707-300B, 707-300C,
707-400, 720, 720B
E. Compliance
The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to
this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this
service bulletin mandatory.
Boeing recommends that the change given in this service bulletin be done within 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.
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Elapsed HoursTask HoursNumber of PersonsTask
3.106.202Open Access
1.001.001Figure 1
1.001.001Figure 2
1.001.001Figure 3
1.001.001Figure 4
0.550.551Test
3.006.002Close Access
10.6516.75TOTAL FOR EACH AIRPLANE
H. Weight and Balance Changes
None.
I. Electrical Load Data
Not applicable.
J. References
1. Existing Data:
a. Engineering Change Memo PRR 18115-RS
b. Service Related Problem (SRP) 707-SRP-35-0050
c. Fleet Team Digest 707 FTD 35-12001
d. 707 Maintenance Manual (AMM) Subject 35-0-0, 35-1-0, 25-2-31
2. Data Supplied with this Service Bulletin:
None.
3. Installation Drawings Used in the Preparation of this Service Bulletin:
TitleDrawing Number
TUBING INSTL. - OXYGEN SEC. 4165-01656
PROD. ILLUST. TUBING INSTL. - SECTION 41. CAPTAIN AND
FIRST OFFICER
50-2541- 5PI Sheets
21-10, 21-11, 21-12,
21-13, 21-14, 21-15,
21-16
PROD. ILLUST. TUBING INSTL. - SECTION 41. OBSERVER AND
NAVIGATOR
50-2541- 5PI Sheets
23-10, 23-11, 23-12
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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:
Chapter-SectionPublication
35-1707 Illustrated Parts Catalog
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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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
Inspect the airplane to determine the flight crew oxygen system configuration. Refer to the Table
in 2.C.2., and for each crew member location found determine if a new oxygen flex hose assembly
is required. The total number of hose assemblies 60B50059-642 required to change one airplane
is the sum of the individual locations with hose assemblies requiring replacement.
2. Parts and Materials Supplied by the Operator
The following parts or materials are necessary to do the change in this service bulletin. Parts and
materials in the manuals given in Paragraph 1.J., References, can also be necessary. Examine
operator part and material supply to make sure all necessary parts and materials are available.
NotesExisting Part NumberNameQTYPart Number /
Specification
Captain10-60174-24 or 37001- 642
(a), (c), (d), (e)
Hose Assembly (36 inch)160B50059-642 (b),
(f)
1st Officer10-60174-24 or 37001- 642
(a), (c), (d), (e)
Hose Assembly (36 inch)160B50059-642 (b),
(f)
Observer10-60174-24 or 37001- 642
(a), (c), (d), (e)
Hose Assembly (36 inch)160B50059-642 (b),
(f)
Navigator10-60174-24 or 37001- 642
(a), (c), (d), (e)
Hose Assembly (36 inch)160B50059-642 (b),
(f)
(a) Existing optional part number 10-60174-36 or 37001-36.
(b) Hydraflow, 1881 W. Malvern Ave., Fullerton, CA., 92833-2403 (USA) , Cage Code 24984, TEL: (714)
773-2600, FAX: (714) 773-6351, email: www.hydraflowusa.com.
(c) This part is not used in production.
(d) Discard the existing part.
(e) You can not use the existing part to replace the new or changed part.
(f) Supplier part number 38001- 642.
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3. Parts Modified and Reidentified
None.
4. Parts Removed and Not Replaced
None.
D. Parts Necessary to Change Spares
None.
E. Special Tooling - Price and Availability
None.
F. Special Tooling Necessary to do this Service Bulletin
No special tools or equipment are necessary to do the change in this service bulletin. But, maintenance
and overhaul tools in the manuals given in Paragraph 1.J., References, can be necessary. Examine
operator tool supply to make sure all necessary tools are available.
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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. Unless shown differently, these dimensions and tolerances are used:
– 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. The instructions in Paragraph 3.B., Work Instructions and the figures can include
operation of tools or test equipment. Boeing Engineering Tool Drawings, the Illustrated
Tool and Equipment Manual, and the Special Tool and Ground Handling Drawing
Index contain data on versions of the tools or test equipment that you can use. It is
permitted to use replaced tools. It is not permitted to use superseded tools.
6. 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.
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.
8. Shaded areas in Figures are to separate the non-critical and non-authoritative
information from the critical and authoritative information.
B. WORK INSTRUCTIONS
CAUTION: OXYGEN SYSTEM COMPONENTS REQUIRE SPECIAL CARE AND HANDLING
PROCEDURES. REVIEW THE SAFETY AND MAINTENANCE PROCEDURES SHOWN
IN 707 AMM 35-0-0.
1. Remove sidewall and ceiling panels as needed to gain access to the applicable oxygen flex hose.
Refer to 707 AMM 25-2-31 as an accepted procedure.
a. For the Captain and First Officer locations, refer to Figures 1 and 2.
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b. For the Observer and Navigator locations, refer to Figures 3 and 4.
2. Turn off and depressurize the crew oxygen system, refer to 707 AMM 35-1-0 as an accepted
procedure.
3. Remove the existing conductive oxygen hose assemblies in accordance with Figures 1, 2, 3, and
4.
NOTE: Ensure the hose assembly elbows and unions do not move during hose removal.
Orientation of the elbows and unions are essential in maintaining proper clearances with
other structure.
4. Install the applicable new non-conductive oxygen hose assemblies in accordance with Figures 1,
2, 3, and 4.
NOTE: Ensure the hose assembly elbows and unions do not move during hose installation.
Orientation of the elbows and unions are essential in maintaining proper clearances with
other structure.
5. Turn on and pressurize the crew oxygen system, refer to 707 AMM 35-1-0 as an accepted
procedure.
6. Do a leak detection procedure on the new non-conductive oxygen hose and functional test the
flight crew oxygen system, refer to 707 AMM 35-1-0 as an accepted procedure.
7. Install removed sidewall and ceiling panels as applicable, refer to 707 AMM 25-2-31 as an accepted
procedure.
8. Put the airplane back to a serviceable condition.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: October 02, 2013
A3538
20 of 28
BOEING SERVICE BULLETIN A3538
ALERTALERT

### Page 21 (OCR)

BOEING SERVICE BULLETIN А3538
ALERT  ALERT
STA
312
STA
243
STA
TYPICAL  203
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.
FIGURE 1: FLIGHT COMPARTMENT - CAPTAINS OXYGEN HOSE ASSEMBLY - REPLACEMENT
(SHEET 1 OF 2)
Original Issue: October 02, 2013
PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  A3538
Work - See page 1 for details.  21 of 28

### Page 22

More DataQtyIdentificationNameTaskStep
Refer to 707 AM 35-
0-0 as an accepted
procedure.
110-60174-24HOSE ASSEMBLYRemove1
Refer to 707 AM 35-
0-0 as an accepted
procedure.
160B50059-642HOSE ASSEMBLYInstall (New)2
FIGURE 1: FLIGHT COMPARTMENT - CAPTAINS OXYGEN HOSE ASSEMBLY - REPLACEMENT
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: October 02, 2013
A3538
22 of 28
BOEING SERVICE BULLETIN A3538
ALERTALERT

### Page 23 (OCR)

BOEING SERVICE BULLETIN А3538
ALERT  ALERT
STA
227
STA
178  TYPICAL
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.
FIGURE 2: FLIGHT COMPARTMENT - FIRST OFFICERS OXYGEN HOSE ASSEMBLY - REPLACEMENT
(SHEET 1 OF 2)
Original Issue: October 02, 2013
PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  A3538
Work - See page 1 for details.  23 of 28

### Page 24

More DataQtyIdentificationNameTaskStep
Refer to 707 AM 35-
0-0 as an accepted
procedure.
110-60174-24HOSE ASSEMBLYRemove1
Refer to 707 AM 35-
0-0 as an accepted
procedure.
160B50059-642HOSE ASSEMBLYInstall (New)2
FIGURE 2: FLIGHT COMPARTMENT - FIRST OFFICERS OXYGEN HOSE ASSEMBLY - REPLACEMENT
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: October 02, 2013
A3538
24 of 28
BOEING SERVICE BULLETIN A3538
ALERTALERT

### Page 25 (OCR)

BOEING SERVICE BULLETIN A3538
ALERT  ALERT
STA
312
STA
178
S-13-
S-16 -
STA
277
STA
251  TYPICAL  2221815
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.
FIGURE 3: FLIGHT COMPARTMENT - OBSERVERS OXYGEN HOSE ASSEMBLY - REPLACEMENT
(SHEET 1 OF 2)
Original Issue: October 02, 2013
PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  A3538
Work - See page 1 for details.  25 of 28

### Page 26

More DataQtyIdentificationNameTaskStep
Refer to 707 AM 35-
0-0 as an accepted
procedure.
110-60174-24HOSE ASSEMBLYRemove1
Refer to 707 AM 35-
0-0 as an accepted
procedure.
160B50059-642HOSE ASSEMBLYInstall (New)2
FIGURE 3: FLIGHT COMPARTMENT - OBSERVERS OXYGEN HOSE ASSEMBLY - REPLACEMENT
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: October 02, 2013
A3538
26 of 28
BOEING SERVICE BULLETIN A3538
ALERTALERT

### Page 27 (OCR)

BOEING SERVICE BULLETIN А3538
ALERT  ALERT
STA
294
S-5
STA
277
STA
294
S-8
S-12
TYPICAL  2221816
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.
FIGURE 4: FLIGHT COMPARTMENT - NAVIGATORS OXYGEN HOSE ASSEMBLY - REPLACEMENT
(SHEET 1 OF 2)
Original Issue: October 02, 2013
PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  A3538
Work - See page 1 for details.  27 of 28

### Page 28

More DataQtyIdentificationNameTaskStep
Refer to 707 AM 35-
0-0 as an accepted
procedure.
110-60174-24HOSE ASSEMBLYRemove1
Refer to 707 AM 35-
0-0 as an accepted
procedure.
160B50059-642HOSE ASSEMBLYInstall (New)2
FIGURE 4: FLIGHT COMPARTMENT - NAVIGATORS OXYGEN HOSE ASSEMBLY - REPLACEMENT
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: October 02, 2013
A3538
28 of 28
BOEING SERVICE BULLETIN A3538
ALERTALERT

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