# Boeing Alert Service Bulletin 757-35A0015: Boeing Service Bulletin

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- Title as filed: Boeing Service Bulletin
- Pages: 29
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## Text

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### Page 1

Commercial
Airplane
Group
757
Service Bulletin
Number: 757-35A0015 Revision Transmittal SheetDate: September 2, 1999
Revision 2: June 15, 2000
ATA System: 3511
SUBJECT: OXYGEN - Crew Oxygen - Crew Oxygen System Low Pressure Flex Hose Replacement
This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION
No more work is necessary on airplanes changed as shown in Revision 1 of this service bulletin.
REASON FOR REVISION
This revision is sent to advise operators of the following:
The addition of the vendor equivalent oxygen hose part numbers to the Parts Necessary For Each Airplane
section.
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
Original Release: September 2, 1999
Revision 1: November 11, 1999
Revision 2: June 15, 2000
757-35A0015
Revision Transmittal Page 1 of 1

### Page 2

(No text on this page.)

### Page 3

Commercial
Airplane
Group
757
Service Bulletin
Number: 757-35A0015 SummaryDate: September 2, 1999
Revision 2: June 15, 2000
ATA System: 3511
SUBJECT: OXYGEN - Crew Oxygen - Crew Oxygen System Low Pressure Flex Hose Replacement
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. An electrical grounding condition can cause
the hose to melt or burn from smoke and/or fire.
One operator has reported damaged oxygen supply
hoses on the 757 in August of 1997. The damage
occurred due to a short circuit in the Audio Select
Panel. It sent an electrical current through the
support structure to the flight crew, mask stowage
box. This caused the spring inside the low pressure,
oxygen hose to act as an electrical conductor and
heat up. This caused the hose to burn through.
Also, a similar occurrence on a 737, was reported
due to improper maintenance.
This service bulletin will replace low pressure
oxygen hoses with non-conductive hoses located on
the flight deck. The replacement of the oxygen
hoses will help prevent electrical current from
passing through the supporting spring which can
cause the hose to melt or burn from smoke and/or
fire.
Boeing Service Related Problem (SRP)
757-SRP-35-0014 is related to this service bulletin.
ACTION (PRR 54530-213)
Remove the crew oxygen boxes. Replace the
existing low pressure hoses with the new
non-conductive hoses. Install the crew oxygen
boxes. Functional test the system.
EFFECTIVITY
All 757 airplanes, line numbers 1 through 884,
except line numbers 804, 810, 818, 839, 846, 849,
and 855.
COMPLIANCE
Boeing recommends compliance at the earliest
opportunity when manpower, material and facilities
are available.
INDUSTRY SUPPORT INFORMATION
Boeing warranty remedies are not available for the
configuration changes given in this service bulletin.
MANPOWER
Total Elapsed Time
Man-Hours (Hours)
2.5 2.5
MATERIAL INFORMATION
None
757-35A0015
Summary Page 1 of 2

### Page 4

BOEING SERVICE BULLETIN 757-35A0015
(TYPICAL)
FWD
APPLICABLE
BOX HOSES AS
REPLACE OXYGEN
S89342
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 Summary Page 2 of 2

### Page 5

Commercial
Airplane
Group
757
Service Bulletin
Number: 757-35A0015
Date: September 2, 1999
Revision 2: June 15, 2000
ATA System: 3511
SUBJECT: OXYGEN - Crew Oxygen - Crew Oxygen System Low Pressure Flex Hose Replacement
THIS SERVICE 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 D624N001, Part 3 for Airplane Variable Number, Line
Number, and Serial Number data.
This service bulletin is for the airplanes shown below. An equivalent change is on subsequent
production airplanes. Refer to PRR 54530-213 for data about this change.
Airplane Models:
757-200 757-200C 757-200PF
IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER
AEROMEXICO (AMX)
NC066-NC071
AIR EUROPA (ARE)
NA214 NA342 NA345 NA348 NA391 NA396
AIR HOLLAND CHARTER (HOL)
NB071 NB073 NB133 NB137
AIR TRANSAT (AIJ)
NA399 NB145-NB146 NB202 NB239
AIR 2000 (ATZ)
NA022-NA023 NA397 NA441-NA443 NA447 NB131-NB132 NB134
NB321 NB329 NT232
AIRTOURS INT'L AIRWAYS (GUE)
NA005-NA006 NA008 NA011 NB140 NB571
AMERICA WEST AIRLINES (AMW)
NA018-NA020 NA028 NB021-NB023 NB036-NB041
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 Page 1 of 24

### Page 6

BOEING SERVICE BULLETIN 757-35A0015
AMERICAN AIRLINES (AAL)
ND011-ND059 ND111-ND113 ND161-ND166 ND168-ND199 NT731-NT742
AMERICAN TRANS AIR (ATA) (AAT)
NA446 NC058-NC062 NT281-NT283
ANSETT WORLDWIDE AVIATION (AWW)
NB167 NC972
ARKIA ISRAELI AIRLINES (ARK)
NA395
AVIANCA (AVI)
NB148 NB221 NB324 NB326
AZERBAIJAN AIRLINES (AHY)
NT436
BOEING (TBC)
NA001
BRITANNIA AIRWAYS (BRI)
NA406 NB422-NB438 NT431-NT432
BRITANNIA AIRWAYS AB (TNS)
NA024 NA343-NA344 NA346 NB323
BRITISH AIRWAYS (BAB)
NA201-NA204 NA206-NA213 NA215-NA239 NA301-NA305 NA394 NA398
NB322 NB581-NB583 NT401-NT404 NT406
CANADA 3000 AIRLINES (ATW)
NB135 NB142 NB201 NB203-NB204 NB225
CHALLENGE AIR CARGO (CHA)
NC973-NC974
CHINA SOUTHERN AIRLINES (GUN)
NA349 NB061-NB068 NB070 NB261-NB267 NB296
CHINA SOUTHWEST AIRLINES (XIN)
NB291-NB295 NB297-NB299 NB301-NB302 NB327 NT201-NT202
CHINA XINJIANG AIRLINES (XIJ)
NB325 NB328 NT231 NT381-NT383
CONDOR (CDF)
NB079 NE161-NE177
CONTINENTAL AIRLINES (CAL)
ND301-ND322 NT751-NT764
DELTA AIR LINES (DAL)
NA501-NA586 NB001-NB004 NE008 NT701-NT710
EL AL ISRAEL AIRLINES (ELA)
NB072 ND001-ND007 ND401
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 2

### Page 7

BOEING SERVICE BULLETIN 757-35A0015
ESTADO NACIONAL ARGENTINO ENA (ESA)
NB144
ETHIOPIAN AIRLINES (ETH)
NC951 NE201-NE204
FAR EASTERN AIR TRANSPORT (FAT)
NC051 NE301-NE302 NT881-NT883
FINNAIR (FIN)
NT341-NT345
FLYING COLOURS (FLN)
NA445 NB222-NB223 NB226-NB228 NB230 NB330-NB331 NT233-NT234
GREENLANDAIR (GRL)
NA350
IBERIA AIRLINES (IBE)
ND241-ND245 ND247-ND248 NT901-NT903
ICELANDAIR (ICE)
NB224 NC971 ND201-ND203 NT861-NT862
L.T.E. INTERNATIONAL AIRWAYS (LTE)
NA191-NA193
LAPA ARGENTINA (LAZ)
NC052 NC073
LTU (LTU)
NA025-NA026 NA194-NA199 NB446 NB561 NT411-NT412
MEXICANA AIRLINES (CMA)
NC056-NC057 NC072 NT376-NT378
MEXICO'S PRESIDENTIAL AIRCRAFT (MXG)
NA027
MID EAST JET (SKL)
NC161
MONARCH AIRLINES (MON)
NA401-NA405 NA407-NA408
NASA (NAS)
NA002
NATIONAL AIRLINES, INC. (NAB)
NA341 NA347 NA351 NA444 NB139 NB421
ND246 NT405 NT407-NT409
NORTH AMERICAN AIRLINES (NNA)
NB236 NT239
NORTHWEST AIRLINES (NWA)
NC001-NC033 NE311-NE325
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 3

### Page 8

BOEING SERVICE BULLETIN 757-35A0015
PRIVATAIR (PTS)
NB136
ROYAL AIR MAROC (RAM)
NC041-NC042
ROYAL AIRLINES (ROY)
NA352 NA392-NA393
ROYAL BRUNEI AIRLINES (RBA)
NB051-NB052
ROYAL NEPAL AIRLINES (RNA)
ND891 ND895
SAUDI ROYAL FLIGHT (SRF)
NB168
SHANGHAI AIRLINES (SHA)
NE001-NE007
STAR AIR TOURS (SRT)
NA205 NB053
STARFLITE CORPORATION (ZKX)
NB147
TACV-CABO VERDE AIRLINES (TCV)
NC074
TAESA (TES)
NB138
THE YUCAIPA COMPANIES (YUC)
NB312
TRANSAVIA AIRLINES (TAV)
NB451-NB454
TURKMENISTAN AIRLINES (TUE)
NB143 NB161-NB162
TWA (TWA)
NC075-NC084 NC091-NC094 NT351-NT357 NT371
UNITED AIRLINES (UAL)
NE011-NE088 NE091-NE094 NE141-NE150 NT791-NT796
UPS (UPS)
NC901-NC950 NS601-NS616 NT001-NT009
US AIR FORCE (USF)
NP901-NP904
US AIRWAYS (USA)
NA003-NA004 NA007 NA009-NA010 NA012-NA016 NA021 NB501-NB523
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 4

### Page 9

BOEING SERVICE BULLETIN 757-35A0015
UZBEKISTAN AIRWAYS (UZB)
NC151 NT441
VULCAN NORTHWEST (VUL)
NB141 NB311
XIAMEN AIRLINES (XIA)
ND221-ND225
IDENTIFICATION BY VARIABLE NUMBER
NA001-NA028 NA191-NA199 NA201-NA239 NA301-NA305 NA341-NA352 NA391-NA399
NA401-NA408 NA441-NA447 NA501-NA586 NB001-NB004 NB021-NB023 NB036-NB041
NB051-NB053 NB061-NB073 NB079 NB131-NB148 NB161-NB162 NB166-NB168
NB201-NB204 NB221-NB228 NB230 NB236 NB239 NB261-NB267
NB291-NB299 NB301-NB302 NB311-NB312 NB321-NB331 NB421-NB438 NB446
NB451-NB454 NB501-NB523 NB561 NB571 NB581-NB583 NC001-NC033
NC041-NC042 NC051-NC052 NC056-NC062 NC066-NC084 NC091-NC094 NC151
NC161 NC901-NC951 NC971-NC974 ND001-ND007 ND011-ND059 ND111-ND113
ND161-ND199 ND201-ND203 ND221-ND225 ND241-ND248 ND301-ND322 ND401
ND891 ND895 NE001-NE008 NE011-NE088 NE091-NE094 NE141-NE150
NE161-NE177 NE201-NE204 NE301-NE302 NE311-NE325 NP901-NP904 NS601-NS616
NT001-NT009 NT201-NT202 NT231-NT234 NT239 NT281-NT283 NT341-NT345
NT351-NT357 NT371 NT376-NT378 NT381-NT383 NT401-NT409 NT411-NT412
NT431-NT432 NT436 NT441 NT701-NT710 NT731-NT742 NT751-NT764
NT791-NT796 NT861-NT862 NT881-NT883 NT901-NT903
2. Spares Affected
None
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 5

### Page 10

BOEING SERVICE BULLETIN 757-35A0015
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. An electrical grounding condition can cause
the hose to melt or burn from smoke and/or fire.
One operator has reported damaged oxygen supply hoses on the 757 in August of 1997. The
damage occurred due to a short circuit in the Audio Select Panel. It sent an electrical current through
the support structure to the flight crew mask stowage box. This caused the spring inside the low
pressure, oxygen hose to act as an electrical conductor and heat up. This caused the hose to burn
through.
Also, a similar occurrence on a 737, was reported due to improper maintenance.
This service bulletin will replace low pressure, oxygen hoses with non-conductive hoses located on
the flight deck. The replacement of the oxygen hoses will help prevent electrical current from passing
through the supporting spring which can cause the hose to melt or burn from smoke and/or fire.
Revision 1 is sent to advise operators of a revision to the airplane effectivities. 757-300 airplane line
numbers 804, 810, 818, 839, 846, 849, and 855 were removed. This is due to Joint Aviation
Authority (JAA) certification issues, and therefore, the 757-200 and the 757-300 airplanes require
separate service bulletins. 757-300 airplanes, line numbers 804, 810, 818, 839, 846, 849, and 855
are covered in service bulletin 757-35A0016.
Revision 2 is sent to advise operators of the following:
The addition of the vendor equivalent oxygen hose part numbers to the Parts Necessary For Each
Airplane.
Boeing Service Related Problem (SRP) 757-SRP-35-0014 is related to this service bulletin.
D. Description
Remove the crew oxygen boxes. Replace the existing low pressure hoses with the new
non-conductive hoses. Install the crew oxygen boxes. Functional test the system.
Revision 2 - No more work is necessary on airplanes changed as shown in the initial release of this
service bulletin.
An evaluation form is attached to this service bulletin. Please use this form to tell us what you think
of the quality of this service bulletin.
E. Compliance
Boeing recommends compliance at the earliest opportunity when manpower, material and facilities
are available.
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 6

### Page 11

BOEING SERVICE BULLETIN 757-35A0015
F. Approval
This service bulletin was examined by the Federal Aviation Administration (FAA). The changes
specified in this service bulletin comply with the applicable Federal Aviation Regulations (FAR) and
are FAA approved. This service bulletin and the FAA approval were based on the airplane in its
original Boeing delivery configuration or as modified by other FAA 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.
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 7

### Page 12

BOEING SERVICE BULLETIN 757-35A0015
G. Manpower
The table below shows an estimate of the man-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
man-hour data if necessary. The estimate does not include lost time. These are some examples of
lost time:
- Time to adjust to the workplace
- Time to schedule the work
- Time to examine the work
- Time to cure the materials
- Time to make the parts
- Time to find the tools.
Task Number of Persons Man-Hours Elapsed Time (Hours)
Access 1 .75 .75
Replace hoses 1 1.0 1.0
Restore 1 .75 .75
TOTAL FOR EACH AIRPLANE 2.5 2.5
H. Weight and Balance Changes
None
I. Electrical Load Data
Not changed
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 8

### Page 13

BOEING SERVICE BULLETIN 757-35A0015
J. References
1. Existing Data:
a. Engineering Change Memo PRR 54530-213
b. Service Related Problem (SRP) 757-35-0014
c. 757 Maintenance Manual (AMM) Subject 12-15-08, 20-41-00, 35-00-00, 35-11-00, 35-11-51
d. Boeing Service Bulletin 757-35A0016, "OXYGEN - Crew Oxygen - Crew Oxygen System Low
Pressure Flex Hose Replacement"
2. Data supplied with this service bulletin:
None
3. Installation Drawings Used in the Preparation of This Service Bulletin:
Drawing Number Title
232N8001 OXYGEN MASK INSTL - CREW
208N0000 MANAGEMENT COLLECTOR - TUBING
INSTL - DWG TREE AND GENERAL NOTES
208N4132 TUBING INSTL - UPPER R CAB STA 199.09
- 297
208N4133 TUBING INSTL - UPPER L CAB STA 199.09
- 297
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 Changed
Publication Chapter-Section
757 Maintenance Manual 35-11
757 Illustrated Parts Catalog 35-11
L. Interchangeability and Intermixability of Parts
Refer to Paragraph 2.E., Existing Parts Accountability, for interchangeability and intermixability
information.
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 9

### Page 14

BOEING SERVICE BULLETIN 757-35A0015
BLANK PAGE
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 10

### Page 15

BOEING SERVICE BULLETIN 757-35A0015
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:
None
2. Parts and Materials Supplied by the Operator:
QTY Boeing Part Number / Vendor Part Number Name
(a) 60B50059-606 / 38001-606 (b) Hose Assy
(a) 60B50059-607 / 38001-607 (b) Hose Assy
(a) For hose quantity requirements, see Illustrated Parts Catalog 35-11 for customer specific
configuration.
(b) HydraFlow (V24984)
13259 East 166th Street
Cerritos, CA 90701-2203 (USA)
D. Parts Necessary to Change Spares
None
E. Existing Parts Accountability
The parts shown below are changed as shown in this service bulletin.
Existing Part Number RUC Name QTY New Part Number PNC RC
60B50059-70 DIS Hose Assy (a) 60B50059-606 S A
60B50059-81 DIS Hose Assy (a) 60B50059-607 S A
(a) For hose quantity requirements, see Illustrated Parts Catalog 35-11 for customer specific
configuration.
RUC Recommended Use Code
DIS - Discard the part.
PNC Part Number Code
S - To get a new part, use this part number in your order.
- This is the part number after the change given in this service bulletin.
- This part is used in production.
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 11

### Page 16

BOEING SERVICE BULLETIN 757-35A0015
(Continued)
RC Replacement Code
A - Do not use the existing part to replace the new or changed part.
F. Special Tooling - Price and Availability
None
G. 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.
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 12

### Page 17

BOEING SERVICE BULLETIN 757-35A0015
3. ACCOMPLISHMENT INSTRUCTIONS
GENERAL NOTES
1. The paragraphs identified with a letter give the general work instructions and the necessary tests.
The instructions identified with numbers on the figures give the recommended sequence of steps.
2. Refer to the Boeing Standard Wiring Practices Manuals 20-10-11 and 20-10-12 for the wire
installation procedures.
3. Obey all of the warnings and cautions given in the specified manual sections.
WORK INSTRUCTIONS
CAUTION: OXYGEN SYSTEM COMPONENTS REQUIRE SPECIAL CARE AND HANDLING
PROCEDURES. REVIEW THE SAFETY AND MAINTENANCE PROCESSES
SHOWN IN THE 757 AMM 35-00-00.
A. Remove the oxygen stowage boxes as shown in 757 AMM 35-11-51 or operator's equivalent
procedure.
B. Remove the existing conductive oxygen hoses as shown in Figures 1, 2, 3, 4, and 5.
NOTE: Ensure that the hose assembly elbows and unions do not move during hose replacement.
Orientation of the elbows and unions are essential in maintaining proper clearances with
other structure.
C. Install the applicable new non-conductive oxygen hoses as shown in Figures 1, 2, 3, 4, and 5.
D. Install the oxygen stowage boxes as shown in 757 AMM 35-11-51 or operator's equivalent
procedure.
E. Functional test the crew oxygen system as shown in 757 AMM 35-11-00, "Operational Test - Crew
Oxygen Mask/Regulator" or operator's equivalent procedure.
F. Put the airplane back to a serviceable condition.
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 13

### Page 18

BOEING SERVICE BULLETIN 757-35A0015
FIGURE TABLE OF CONTENTS
Title Page
FIGURE 1. OXYGEN BOX HOSE TYPICAL LOCATIONS. ....................... 1 5
FIGURE 2. CAPTAIN AND FIRST OFFICER'S OXYGEN BOX HOSE
REPLACEMENT .............................................. 1 6
FIGURE 3. RIGHT OBSERVER'S SEAT OXYGEN BOX HOSE REPLACEMENT ..... 2 0
FIGURE 4. LEFT OBSERVER'S SEAT OXYGEN BOX HOSE REPLACEMENT . ..... 2 2
FIGURE 5. SUPERNUMERARY OXYGEN BOX HOSE REPLACEMENT. ........... 2 4
September 2, 1999 757-35A0015
Revision 2: June 15, 2000 14

### Page 19

BOEING SERVICE BULLETIN 757-35A0015
FWD
FIGURE 4
FIGURE 3
FIGURE 5
FIGURE 2
SEE
SEE
SEE
SEE
FIGURE 2
SEE
S89304
FIGURE 1. OXYGEN BOX HOSE TYPICAL LOCATIONS
September 2, 1999 SHEET 1 OF 1 757-35A0015
Revision 2: June 15, 2000 15

### Page 20

BOEING SERVICE BULLETIN 757-35A0015
FWDBSEESEE A
FLIGHT COMPARTMENT
S89323
FIGURE 2. CAPTAIN AND FIRST OFFICER'S OXYGEN BOX HOSE REPLACEMENT
September 2, 1999 SHEET 1 OF 4 757-35A0015
Revision 2: June 15, 2000 16

### Page 21

BOEING SERVICE BULLETIN 757-35A0015
4
32
A
CAPTAIN'S CONSOLE
1
INBD
UP
FWD
S89324
FIGURE 2. CAPTAIN AND FIRST OFFICER'S OXYGEN BOX HOSE REPLACEMENT
September 2, 1999 SHEET 2 OF 4 757-35A0015
Revision 2: June 15, 2000 17

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BOEING SERVICE BULLETIN 757-35A0015
1
2 3
FIRST OFFICER'S CONSOLE
4
B
INBD
UP
FWD
S89325
FIGURE 2. CAPTAIN AND FIRST OFFICER'S OXYGEN BOX HOSE REPLACEMENT
September 2, 1999 SHEET 3 OF 4 757-35A0015
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### Page 23

BOEING SERVICE BULLETIN 757-35A0015
The step numbers shown below agree with the numbers shown in the circle symbols in the figure.
STEP TASK NAME REFERENCES QTY NOTES
1 Remove /
Keep
Oxygen Box 757 AMM 35-11-51 2 -
2 Remove /
Discard
Hose Assy 757 AMM 35-11-51 2 Discard the Hose Assy after
recording the part number.
3 Install Hose Assy 757 AMM 35-11-51 2 See Existing Parts
Accountability for applicable
Hose Assy.
4 Install /
Kept
Oxygen Box 757 AMM 35-11-51 2 -
FIGURE 2. CAPTAIN AND FIRST OFFICER'S OXYGEN BOX HOSE REPLACEMENT
September 2, 1999 SHEET 4 OF 4 757-35A0015
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BOEING SERVICE BULLETIN 757-35A0015
FWD
A
SEE A
32
41
FLIGHT COMPARTMENT
S89330
FIGURE 3. RIGHT OBSERVER'S SEAT OXYGEN BOX HOSE REPLACEMENT
September 2, 1999 SHEET 1 OF 2 757-35A0015
Revision 2: June 15, 2000 20

### Page 25

BOEING SERVICE BULLETIN 757-35A0015
The step numbers shown below agree with the numbers shown in the circle symbols in the figure.
STEP TASK NAME REFERENCES QTY NOTES
1 Remove /
Keep
Oxygen Box 757 AMM 35-11-51 1 -
2 Remove /
Discard
Hose Assy 757 AMM 35-11-51 1 Discard the Hose Assy after
recording the part number.
3 Install Hose Assy 757 AMM 35-11-51 1 See Existing Parts
Accountability for applicable
Hose Assy.
4 Install /
Kept
Oxygen Box 757 AMM 35-11-51 1 -
FIGURE 3. RIGHT OBSERVER'S SEAT OXYGEN BOX HOSE REPLACEMENT
September 2, 1999 SHEET 2 OF 2 757-35A0015
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BOEING SERVICE BULLETIN 757-35A0015
FWDSEE A
1
2
4
3
A
FLIGHT COMPARTMENT
FWD
S89334
FIGURE 4. LEFT OBSERVER'S SEAT OXYGEN BOX HOSE REPLACEMENT
September 2, 1999 SHEET 1 OF 2 757-35A0015
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BOEING SERVICE BULLETIN 757-35A0015
The step numbers shown below agree with the numbers shown in the circle symbols in the figure.
STEP TASK NAME REFERENCES QTY NOTES
1 Remove /
Keep
Oxygen Box 757 AMM 35-11-51 1 -
2 Remove /
Discard
Hose Assy 757 AMM 35-11-51 1 Discard the Hose Assy after
recording the part number.
3 Install Hose Assy 757 AMM 35-11-51 1 See Existing Parts
Accountability for applicable
Hose Assy.
4 Install /
Kept
Oxygen Box 757 AMM 35-11-51 1 -
FIGURE 4. LEFT OBSERVER'S SEAT OXYGEN BOX HOSE REPLACEMENT
September 2, 1999 SHEET 2 OF 2 757-35A0015
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BOEING SERVICE BULLETIN 757-35A0015
1 4 23
FWD
S89337
The step numbers shown below agree with the numbers shown in the circle symbols in the figure.
STEP TASK NAME REFERENCES QTY NOTES
1 Remove /
Keep
Oxygen Box 757 AMM 35-11-51 1 -
2 Remove /
Discard
Hose Assy 757 AMM 35-11-51 1 Discard the Hose Assy after
recording the part number.
3 Install Hose Assy 757 AMM 35-11-51 1 See Existing Parts
Accountability for applicable
Hose Assy.
4 Install /
Kept
Oxygen Box 757 AMM 35-11-51 1 -
FIGURE 5. SUPERNUMERARY OXYGEN BOX HOSE REPLACEMENT
September 2, 1999 SHEET 1 OF 1 757-35A0015
Revision 2: June 15, 2000 24

### Page 29

Commercial
Airplane
Group
757
Service Bulletin
Number: 757-35A0015 Evaluation FormDate: September 2, 1999
Revision 2: June 15, 2000
ATA System: 3511
Prepared By: Chris Starr
SUBJECT: OXYGEN - Crew Oxygen - Crew Oxygen System Low Pressure Flex Hose Replacement
Use this evaluation form to tell us what you think of the quality of this service bulletin. We will use the data
that you give us to improve the quality of our service bulletins.
NOTE: Please do not use this evaluation form to tell us to make changes to your manuals. To make these
changes, please use a Publication Change Request (PCR) form.
Please give us this data:
(If necessary, please use the other side. Thank you for the time you used to give us your comments.)
OPERATOR: TODAY'S DATE:
PREPARED BY: TITLE:
ORGANIZATION: TELEX CODE:
TELEPHONE NUMBER: BASE:
Please rate the quality of this service bulletin: (good) 4321 (poor)
Please rate the quality of the illustrations: (good) 4321 (poor)
Will you do the change given by this service bulletin? Yes No If not, please explain:
Is this service bulletin easy to understand? Yes No If not, please explain:
Is this service bulletin easy to use? Yes No If not, please explain:
Are the Planning Information, Material Information, and
Accomplishment Instructions accurate? Yes No If not, please explain:
Is the Manpower estimate accurate? Yes No If not, please explain:
Give the completed evaluation form to your Boeing Field Service Representative or send the evaluation form
directly to this address:
Manager
Service Bulletin Engineering
Boeing Commercial Airplane Group
P.O. Box 3707, Mail Stop 2H-37
Seattle, WA 98124-2207

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