# Boeing Alert Service Bulletin 727-35A0031: No revision named

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- Document: [Boeing Alert Service Bulletin 727-35A0031](https://openairdocs.org/service-documents/boeing/727-35a0031.md)
- Title as filed: U.S. DOT/FAA - SB-727-35A0031-00
- Pages: 30
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## Text

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### Page 1

Commercial 
Airplanes
727
Service Bulletin
ALERT
Number: 727-35A0031
Original Issue: July 18, 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Unpublished Work.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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Table of Contents
Summary ...................................................... 5
1. PLANNING INFORMATION ........................................ 9
A. Effectivity ................................................ 9
1. Airplanes ............................................. 9
2. Spares Affected ........................................ 1 3
B. Concurrent Requirements ...................................... 1 4
C. Reason ................................................ 1 4
D. Description .............................................. 1 4
E. Compliance .............................................. 1 4
F. Approval ............................................... 1 5
G. Manpower .............................................. 1 5
H. Weight and Balance Changes .................................... 1 5
I. Electrical Load Data ......................................... 1 5
J. References .............................................. 1 6
1. Existing Data: ......................................... 1 6
2. Data Supplied with this Service Bulletin: ........................... 1 6
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 1 6
K. Publications Affected ........................................ 1 6
L. Interchangeability and Intermixability of Parts ........................... 1 6
M. Software Accomplishment Summary ................................ 1 7
2. MATERIAL INFORMATION ........................................ 1 9
A. Material - Price and Availability ................................... 1 9
B. Industry Support Information .................................... 1 9
C. Parts Necessary for Each Airplane ................................. 1 9
1. Kits/Parts ............................................ 1 9
2. Parts and Materials Supplied by the Operator ........................ 1 9
3. Parts Modified and Reidentified ................................ 2 0
4. Parts Removed and Not Replaced .............................. 2 0
D. Parts Necessary to Change Spares ................................. 2 0
E. Special Tooling - Price and Availability ............................... 2 0
F. Special Tooling Necessary to do this Service Bulletin ....................... 2 0
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 1
A. GENERAL INFORMATION ..................................... 2 1
B. WORK INSTRUCTIONS ....................................... 2 1
FIGURE 1: FLIGHT COMPARTMENT - CAPTAINS OXYGEN HOSE ASSEMBLY - REPLACEMENT . 23
FIGURE 2: FLIGHT COMPARTMENT - FIRST OFFICERS OXYGEN HOSE ASSEMBLY - REPLACEMENT
.................................................. 2 5
FIGURE 3: FLIGHT COMPARTMENT - FIRST OBSERVERS OXYGEN HOSE ASSEMBLY - REPLACEMENT
.................................................. 2 7
FIGURE 4: FLIGHT COMPARTMENT - SECOND OBSERVERS OXYGEN HOSE ASSEMBLY -
REPLACEMENT ........................................ 2 9
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Commercial 
Airplanes
727
Service Bulletin
ALERT
SummaryNumber: 727-35A0031Original Issue: July 18, 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) 727-SRP-35-0050 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 727 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 24855-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
727, 727-100, -100C, -200, -200F, 727C 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 727-35A0031
ALERT  ALERT
STA
259
REMOVE HOSE
INSTALL HOSE
REMOVE HOSE
INSTALL HOSE
REMOVE HOSE
INSTALL HOSE
REMOVE HOSE
INSTALL HOSE
TYPICAL
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Commercial 
Airplanes
727
Service Bulletin
ALERT
Number: 727-35A0031
Original Issue: July 18, 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 24855-RS for data about this change.
This service bulletin is for the airplane(s) shown below.
Refer to Service Bulletin Index D6-9825 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:
727, 727-100, 727-100C, 727-200, 727-200F, 727C
GroupVariable Number
1E0001 - E0042
1E0101 - E0140
1E0201 - E0216
1E0301 - E0351
1E0401 - E0423
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GroupVariable Number
1E3001 - E3006
1E3011 - E3014
1E3021 - E3040
1E3059
1E3061 - E3077
1E3101 - E3103
1E3111 - E3118
1E3141 - E3152
1E3171 - E3177
1E3201 - E3206
1E3221 - E3224
1E3241 - E3290
1E3341 - E3350
1E3401 - E3421
1E3451 - E3452
1E3471 - E3474
1E3501 - E3513
1E3516 - E3523
1E3551 - E3553
1E3571 - E3578
1E3601 - E3604
1E3621 - E3622
1E3651 - E3655
1E3677
1E3681 - E3684
1E3701 - E3704
1E3751 - E3755
1E3781 - E3784
1E5001 - E5011
1E5031 - E5068
1E5101 - E5116
1E5141 - E5143
1E5161 - E5164
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GroupVariable Number
1E5201 - E5203
1E5221 - E5245
1E5251 - E5252
1E5271 - E5281
1E5301 - E5306
1E5351 - E5353
1E5381 - E5382
1E5401 - E5424
1E5426 - E5429
1E5433
1E5435
1E5451 - E5455
1E5481 - E5483
1E5501 - E5502
1QA001 - QA046
1QA051 - QA099
1QA101 - QA199
1QA201 - QA225
1QA301 - QA349
1QA351 - QA376
1QA378
1QA401 - QA499
1QA501 - QA537
1QA551 - QA579
1QA581 - QA585
1QA601 - QA688
1QA701 - QA753
1QA801 - QA805
1QA851 - QA899
1QA901 - QA946
1QA949
1QB001 - QB002
1QB031 - QB049
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GroupVariable Number
1QB051 - QB068
1QB101 - QB110
1QB114 - QB119
1QB121 - QB149
1QB151 - QB158
1QB201 - QB220
1QB301 - QB316
1QB351 - QB352
1QB401 - QB407
1QB451 - QB458
1QB501 - QB575
1QB601 - QB629
1QB651
1QB701 - QB705
1QB801 - QB810
1QB901 - QB904
1QD001 - QD012
1QD031 - QD046
1QD085 - QD088
1QD101 - QD105
1QD121 - QD127
1QD141 - QD149
1QD161 - QD164
1QD191 - QD192
1QD201 - QD239
1QD281 - QD284
1QD301 - QD305
1QD321 - QD330
1QD351
1QD401 - QD403
1QD407
1QD410
1QD421 - QD427
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GroupVariable Number
1QD441 - QD453
1QD471 - QD475
1QD501 - QD518
1QD551 - QD558
1QD571 - QD572
1QD581 - QD583
1QD601 - QD607
1QD621 - QD624
1QD641
1QD661 - QD663
1QD681 - QD685
1QD691 - QD692
1QD701 - QD702
1QD711 - QD717
1QD741
1QD761 - QD769
1QD781 - QD782
1QD791
1QD801 - QD804
1QD821 - QD828
1QD901 - QD910
1QD931 - QD932
1QD951 - QD954
1QD971 - QD973
1QD991 - QD992
1QE001 - QE002
1QL001 - QL008
1QL031 - QL032
1QL081
1QL501 - QL515
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.
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Part Number
10-60174-26 or -9
10-60174-25 or -8
10-60174-36
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 hoses located in the flight compartment.
Boeing Service Related Problem (SRP) 727-SRP-35-0050 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 727 FTD 35-12001 is related to this service bulletin.
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, 2-23727, 727-100, 727-100C, 727-
200, 727-200F, 727C
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.
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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.
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.
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J. References
1. Existing Data:
a. Engineering Change Memo PRR 24855-RS
b. Service Related Problem (SRP) 727-SRP-35-0050
c. Fleet Team Digest 727 FTD 35-12001
d. 727 Aircraft Maintenance Manual (AMM) 25-10-01, 35-00-00
2. Data Supplied with this Service Bulletin:
None.
3. Installation Drawings Used in the Preparation of this Service Bulletin:
TitleDrawing Number
TUBING INSTL - OXYGEN, SECTION 51.65-20900
PROD. ILLUST. TUBING INSTL - SECT 41 CAB FLOOR & UPPER
LH. CAB STA. 178-303.9.
65-25419 Sheets 1, 2,
4, 201, and 210.
PROD. ILLUST. TUBING INSTL - UPPER RH. CAB STA. 178-303.9
SECT. 41.
65-25420 Sheets 1, 2,
3, 201, 210, and 211.
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
35-10727 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.
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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 60B50059-640, -641, -639 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
Captain10-60174-26, or 37001-640
(a), (d), (e), (f)
Hose Assembly, (30 inch length)160B50059-640 or
38001- 640 (c), (g)
1st Officer10-60174-25,or 37001- 641
(b), (d), (e), (f)
Hose Assembly, (24 inch length)160B50059-641 or
38001- 641 (c), (h)
1st Observer10-60174-36, 37001-36 (d),
(e), (f)
Hose Assembly (36 inch length)160B50059-639 or
38001- 639 (c), (i)
2nd Observ-
er
10-60174-36, 37001-36 (d),
(e), (f)
Hose Assembly (36 inch length)160B50059-639 or
38001- 639 (c), (i)
(a) Existing optional part number 10-60174-9 or 37001- 640.
(b) Existing optional part number 10-60174-8 or 37001-641.
(c) 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.
(d) This part is not used in production.
(e) Discard the existing part.
(f) You can not use the existing part to replace the new or changed part.
(g) Supplier part number 38001- 640.
(h) Supplier part number 38001- 641.
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NotesExisting Part NumberNameQTYPart Number /
Specification
(i) Supplier part number 38001- 639.
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 727 AMM 35-00-00.
1. Remove sidewall and ceiling panels as needed to gain access to the applicable oxygen flex hose.
Refer to 727 AMM 25-10-01 as an accepted procedure.
a. For the Captain and First Officer locations, refer to Figures 1 and 2.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 18, 2013
727-35A0031
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BOEING SERVICE BULLETIN 727-35A0031
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### Page 22

b. For the First and Second Observer locations, refer to Figures 3 and 4.
2. Turn off and depressurize the crew oxygen system, refer to 727 AMM 35-00-00 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 727 AMM 35-00-00 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 727 AMM 35-00-00 as an accepted procedure.
7. Install removed sidewall and ceiling panels as applicable, refer to 727 AMM 25-10-01 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: July 18, 2013
727-35A0031
22 of 30
BOEING SERVICE BULLETIN 727-35A0031
ALERTALERT

### Page 23 (OCR)

BOEING SERVICE BULLETIN 727-35A0031
ALERT  ALERT
STA
259
SIA  227  STA  211  STA  196
TYPICAL  2221920
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: July 18, 2013
PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  727-35A0031
Work - See page 1 for details.  23 of 30

### Page 24

More DataQtyIdentificationNameTaskStep
Refer to 727 AMM
35-00-00 as an ac-
cepted procedure.
110-60174-26  (10-
60174-9 optional)
HOSE ASSEMBLYRemove1
Refer to 727 AMM
35-00-00 as an ac-
cepted procedure.
160B50059-640HOSE 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: July 18, 2013
727-35A0031
24 of 30
BOEING SERVICE BULLETIN 727-35A0031
ALERTALERT

### Page 25 (OCR)

BOEING SERVICE BULLETIN 727-35A0031
ALERT  ALERT
STA
259
STA  STA
196
TYPICAL  2221940
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: July 18, 2013
PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  727-35A0031
Work - See page 1 for details.  25 of 30

### Page 26

More DataQtyIdentificationNameTaskStep
Refer to 727 AMM
35-00-00 as an ac-
cepted procedure.
110-60174-25  (10-
60174-8 optional)
HOSE ASSEMBLYRemove1
Refer to 727 AMM
35-00-00 as an ac-
cepted procedure.
160B50059-641HOSE 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: July 18, 2013
727-35A0031
26 of 30
BOEING SERVICE BULLETIN 727-35A0031
ALERTALERT

### Page 27 (OCR)

BOEING SERVICE BULLETIN 727-35A0031
ALERT  ALERT
STA
259
STA
S-11
S-16
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 3: FLIGHT COMPARTMENT - FIRST OBSERVERS OXYGEN HOSE ASSEMBLY - REPLACEMENT
(SHEET 1 OF 2)
Original Issue: July 18, 2013
PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  727-35A0031
Work - See page 1 for details.  27 of 30

### Page 28

More DataQtyIdentificationNameTaskStep
Refer to 727 AMM
35-00-00 as an ac-
cepted procedure.
110-60174-36HOSE ASSEMBLYRemove1
Refer to 727 AMM
35-00-00 as an ac-
cepted procedure.
160B50059-639HOSE ASSEMBLYInstall (New)2
FIGURE 3: FLIGHT COMPARTMENT - FIRST 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: July 18, 2013
727-35A0031
28 of 30
BOEING SERVICE BULLETIN 727-35A0031
ALERTALERT

### Page 29 (OCR)

BOEING SERVICE BULLETIN 727-35A0031
ALERT  ALERT
STA
259
STA
259
STA
277
STA
294
S-11-
S-16
TYPICAL  2221949
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 - SECOND OBSERVERS OXYGEN HOSE ASSEMBLY - REPLACEMENT
(SHEET 1 OF 2)
Original Issue: July 18, 2013
PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  727-35A0031
Work - See page 1 for details.  29 of 30

### Page 30

More DataQtyIdentificationNameTaskStep
Refer to 727 AMM
35-00-00 as an ac-
cepted procedure.
110-60174-36HOSE ASSEMBLYRemove1
Refer to 727 AMM
35-00-00 as an ac-
cepted procedure.
160B50059-639HOSE ASSEMBLYInstall (New)2
FIGURE 4: FLIGHT COMPARTMENT - SECOND 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: July 18, 2013
727-35A0031
30 of 30
BOEING SERVICE BULLETIN 727-35A0031
ALERTALERT

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