October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 1 of 40 

### Commercial Airplane Group 

# 747 Service Bulletin

Number: 747-35A2101 Date: October 28, 1999 Revision 1: May 15, 2003 ATA System: 3510 CAS SUBJECT: OXYGEN - Crew Oxygen - Crew Oxygen System Low Pressure Flex Hose Replacement 

## BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 1999 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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, BBJ, DC-8, DC-9, DC-10, MD-10, MD-11, MD-80, MD-88, MD-90, and the red-white-and-blue Boeing livery 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in writing by Boeing.BLANK PAGE October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 2 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

BLANK PAGEOctober 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 3 of 40 

### Commercial Airplane Group 

# 747 Service Bulletin

Number: 747-35A2101 

### Revision Transmittal Sheet Date: October 28, 1999 Revision 1: May 15, 2003 ATA System: 3510 CAS 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 More work is necessary on airplanes changed as shown in the initial release of this service bulletin. If the protective tape was not applied to the hoses, apply the tape to all the new flight compartment hoses at the next available opportunity. REASON FOR REVISION This revision is sent to advise affected operators of the following: • The NOTE in the Background and Reason section was revised. • The addition of the vendor equivalent, oxygen hose, part numbers and the addition of the tape, part number in the Parts Necessary For Each Airplane section. • The addition of a NOTE at the beginning of the Accomplishment Instructions to clarify which oxygen hoses are to be replaced. • The addition of instructions to remove and install the mask and demand regulator, along with the oxygen boxes. • The addition of a step in the Accomplishment Instructions to apply protective tape to the hoses. • The addition of Figure 2 for the protective tape application. • The data given in Information Notice 747-35A2101 IN 01 is included in this revision. 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: October 28, 1999 Revision 1: Not ReleasedBLANK PAGE October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 4 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

BLANK PAGEOctober 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 5 of 40 

### Commercial Airplane Group 

# 747 Service Bulletin

Number: 747-35A2101 

### Summary Date: October 28, 1999 Revision 1: May 15, 2003 ATA System: 3510 CAS 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. One operator has reported damaged oxygen supply hoses on another Boeing model in August of 1997. This damage has occurred due to a short circuit in the 757 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. Boeing Service Related Problem (SRP) 747-SRP-35-0014 is related to this service bulletin.
Note:Operators affected by Boeing Service Bulletin 747-35A2088 should follow the flight deck hose routing and clearance instructions provided by Service Bulletin 747-35A2088. All other operators should follow the instructions in Service Bulletin 747-35A2101. ACTION(PRR 85900-226) Remove the crew oxygen boxes. Replace the existing low pressure hoses with new non-conductive hoses. Install the crew oxygen boxes. Functional test the system. EFFECTIVITY All 747 airplanes line number 1 through 1229 as applicable.October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 6 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

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

MATERIAL INFORMATION None. Airplanes Total Task Hours Elapsed Hours 747 Classics 2.5 2.5 747-400/D/F 1.75 1.75October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 7 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

(TYPICAL CONFIGURATION)HOSES AS APPLICABLE REPLACE OXYGEN BOX HOSES AS APPLICABLE REPLACE OXYGEN BOX

(TYPICAL CONFIGURATION)



### 747-400 FLIGHT COMPARTMENT 747 FLIGHT COMPARTMENTS93303BLANK PAGE October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 8 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

BLANK PAGEOctober 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9 of 40 

### Commercial Airplane Group 

# 747 Service Bulletin

Number: 747-35A2101 Date: October 28, 1999 Revision 1: May 15, 2003 ATA System: 3510 CAS SUBJECT: OXYGEN - Crew Oxygen - Crew Oxygen System Low Pressure Flex Hose Replacement

1. PLANNING INFORMATION A. Effectivity 1. Airplanes Refer to Service Bulletin Index Document D6-30300 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 85900-226 for data about this change. Airplane models: 747-100 747-100B 747-100B SUD 747-200B 747-200C 747-200F 747-300 747-400 747-400D 747-400F 747SP 747SR IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER AAR AIRCRAFT SALES AND LEASING (AFD) 1 RA313 RA315 RB681–RB682 RD134 AERO CONTROLS (AEO) 1 RA722–RA723 AEROLINEAS ARGENTINAS (ARG) 1 RD053 RD122–RD127 AGES AIRCRAFT SALES & LEASING (AGJ) 1 RB004 AIR ATLANTA ICELANDIC (AID) 1 RA526 RA534 RB411–RB413 RD141 RD143 RD352–RD355 RD414 RD472–RD473 RD647–RD648 RD771 RS332–RS333October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 10 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

AIR CANADA (ACN) 1 RA750 RD531 RT101–RT103 RT701–RT702 RU059 AIR CHINA (BEJ) 1 RD781–RD783 RM811–RM813 RR451 RT031–RT035 RT878–RT880 AIR FRANCE (AFA) 1 RA253 RD271–RD272 RD651–RD655 RD657–RD659 RD721–RD722 RD791–RD792 RR302 RR304 RR306–RR309 RR332 RS751–RS752 RT071–RT075 RT121 RT591 RT711–RT716 AIR GABON (GBN) 1 RD661 AIR INDIA (AIN) 1 RA728–RA731 RS781–RS782 RU001–RU006 AIR MADAGASCAR (MAD) 1 RD561 AIR NAMIBIA (NAM) 1 RT137 AIR NEW ZEALAND (ANZ) 1 RM082 RM191–RM192 RT671–RT673 RT703 RT932 AIR PACIFIC (APC) 1 RD518 AIR PULLMANTUR (PUL) 1 RS331 AIRFREIGHT EXPRESS LIMITED (AIF) 1 RD442 RR221 ALBARAKA (AAB) 1 RB102 ALITALIA (ALI) 1 RD751 RR561 ALL NIPPON AIRWAYS (ANA) 1 RB689–RB695 RB697 RD231–RD232 RM231–RM232 RT751–RT757 RT776–RT777 RU831–RU841 AMIRI FLIGHT (ABD) 1 RH102 RM084October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 11 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

ASIANA AIRLINES (AAR) 1 RM071 RM861 RR746–RR748 RT131–RT136 RU032 ATLAS AIR (TLS) 1 RB683–RB685 RD044 RD361–RD366 RD411–RD412 RD641–RD643 RD646 RD691–RD692 RD752–RD755 RJ333 RM892–RM899 RR301 RR303 RS721–RS722 RS762 AVIATION EXPOSURE MANAGEMENT (EXU) 1 RD131–RD132 AVIATION PARTNERS L.L.C. (APM) 1 RS241 BAHRAIN ROYAL FLIGHT (BHR) 1 RG009 BOEING (TBC) 1 RB688 RR222–RR223 BOEING AIRCRAFT HOLDING CO. (BHC) 1 RD181 RD451–RD456 BOEING CAPITAL CORPORATION (ZMF) 1 RB687 RD072 RJ132 RR201 BRITISH AIRWAYS (BAB) 1 RD139 RD311 RM096–RM097 RM136–RM145 RM261–RM264 RT471–RT499 RU121–RU132 C.A.L. CARGO AIR LINES (CRG) 1 RJ331–RJ332 C.I.T. LEASING CORPORATION (TCI) 1 RD047 CAMEROON AIRLINES (CAM) 1 RS238 CARGOLUX AIRLINES (CLX) 1 RM881–RM883 RR701 RR721–RR724 CATHAY PACIFIC AIRWAYS (CAT) 1 RD358 RD581–RD583 RR441–RR442 RR531 RR951–RR952 RT451–RT469 CHINA AIRLINES (CHI) 1 RD551 RM021–RM024 RR521–RR522 RT631–RT634 RT636–RT640October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 12 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

CONTINENTAL AIRLINES (CAL) 1 RA561 RB005–RB006 CORSAIR (COR) 1 RA023 RA675 RG124 RS233 RS235 RS237 RS239–RS240 DRAGONAIR (DRG) 1 RS741 RS743 RS771 DUBAI AIR WING (DAW) 1 RD622 RG191 RG193 EGYPTAIR (EGP) 1 RS731–RS732 EL AL ISRAEL AIRLINES (ELA) 1 RA784 RB007 RJ152 RM091 RR225–RR226 RU081–RU083 EUROPEAN AVIATION AIR CHARTER (EUL) 1 RD135–RD138 RD140 EVA AIR (EVA) 1 RM116–RM117 RT161–RT168 RT951–RT955 EVERGREEN INTERNATIONAL A/L (EVR) 1 RA004 RA028 RA631 RA633 RB604 RB607 RD041–RD043 RJ131 RJ133 FINOVA (GRB) 1 RA015 RA651 RS761 FLEET CAPITAL LEASING (SBC) 1 RA106 RD001–RD002 FLIGHTPLAN INTERNATIONAL (FLP) 1 RA003 GARUDA INDONESIA (GIA) 1 RD421–RD424 RT931 RU061–RU062 GE (GEC) 1 RA016 GE CAPITAL CORPORATION (GEF) 1 RA005 RA007 RA013 RA027 RA634October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 13 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

GENERIC EMBARGOED CUSTOMER (YWV) 1 RA101–RA103 RA112 RA161–RA163 RA303 RA535 RA537 RG095 RG171–RG172 RJ301–RJ303 RR001–RR004 GLOBAL AIR LEASING (GAO) 1 RG164 GLOBAL PEACE INITIATIVE (GPI) 1 RG174 GLOBAL SUPPLY SYSTEMS (GSS) 1 RM891 GOVERNMENT OF JAPAN (JAG) 1 RT681–RT682 HM THE SULTAN'S FLIGHT (BWN) 1 RT440 HYDRO AIR (HYR) 1 RJ151 IBERIA AIRLINES (IBE) 1 RA585 RD431–RD435 IRAN AIR (IRN) 1 RB711 RD681–RD682 RG101–RG104 JAPAN AIRLINES (JAL) 1 RA528 RA543–RA548 RB723 RD055 RD221–RD227 RM126–RM129 RM316 RR262 RR264–RR267 RR361–RR362 RS001–RS002 RS251–RS259 RS265–RS268 RT641–RT657 RT861–RT864 RT966–RT967 RU801–RU809 JAPAN ASIA AIRWAYS (JAA) 1 RS263 JUMBO JET LEASING (JJL) 1 RA217 RA532–RA533 RA539 RA541 K.B.A. FOUNDATION (KBA) 1 RT877 KABO AIR (KAB) 1 RA305–RA306 RA316 RA501–RA502 RA560 RB008–RB009 RD121 KALITTA AIR (KAC) 1 RA402 RA524 RA635 RA749 RD082–RD083 RD201 RD621 RD623 RR261October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 14 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

KALITTA LEASING (KAA) 1 RB721 KHALIFA AIRWAYS (KHL) 1 RT876 KLM - ROYAL DUTCH AIRLINES (KLM) 1 RD381–RD383 RD601–RD607 RM801 RS711–RS713 RT001–RT014 RT531–RT535 KOREAN AIR (KAL) 1 RM011–RM012 RM871 RR022–RR025 RR861–RR862 RS292 RS786 RT061 RT571–RT588 RT590 RT811–RT814 KUWAIT AIRWAYS (KUW) 1 RD202 RD204 RT151 LOGISTIC AIR, INC. (LGA) 1 RB722 LUFTHANSA GERMAN AIRLINES (DLH) 1 RD291–RD292 RD649 RD772–RD775 RM001–RM002 RR202–RR206 RT041–RT047 RT431–RT439 RT441–RT447 MALAYSIA AIRLINES (MAS) 1 RD142 RD144 RM036–RM038 RT021–RT022 RT743–RT750 RU016–RU017 MARTINAIR HOLLAND (MTH) 1 RJ321–RJ322 RR310 MK AIRLINES (MKA) 1 RD441 RD741 RR224 RR336 RR421 NASA (NAS) 1 RA908 RB601 NIPPON CARGO AIRLINES (NCA) 1 RB696 RD233–RD235 RD461 RR551–RR556 NORTHWEST AIRLINES (NWA) 1 RA370–RA373 RD056–RD057 RD241–RD243 RD251–RD262 RD301–RD302 RM241–RM243 RR005 RR341–RR345 RR431–RR432 RR503 RR566 RS701–RS702 RT401–RT410 OMAN ROYAL FLIGHT (RFO) 1 RG161 RG163 ORIENT THAI AIRLINES (OTH) 1 RA527 RA540October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 15 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

PAKISTAN INT'L AIRLINES (PIA) 1 RD003–RD004 RD101–RD104 RD701–RD702 RS301–RS306 PANAIR (PNR) 1 RG122 PEGASUS AVIATION, INC. (PSS) 1 RB010 RD513 PHILIPPINE AIRLINES (PAL) 1 RD171–RD172 RD413 RT152 RU051–RU052 RU060 POLAR AIR CARGO (PAO) 1 RA726 RA910 RA914 RD425–RD426 RD592 RR501 RR504 PRATT & WHITNEY ENGINE SERVICE (PWE) 1 RG212–RG213 QANTAS (QAN) 1 RD519 RS271–RS276 RT551–RT568 RT741–RT742 RU031 ROYAL AIR MAROC (RAM) 1 RD671 RT717 SAUDI ARABIAN AIRLINES (SVA) 1 RB741–RB746 RB748 RH121 RM156–RM157 RR526 RS311–RS320 RU101–RU102 SAUDI ROYAL FLIGHT (SRF) 1 RH101 RH122 RS699 SECURITY CUSTOMER (UO1) 1 RB013–RB016 RD166–RD167 SINGAPORE AIRLINES (SIA) 1 RM851–RM852 RR851–RR856 RT501–RT530 RT831–RT835 RT837 SOUTH AFRICAN AIRWAYS (SAA) 1 RB071–RB075 RG121 RG123 RG125 RM081 RM083 RM146–RM147 RS211–RS212 RS221–RS222 RS232 RS236 RT781–RT784 SOUTHERN AIR (SOF) 1 RD182 RR305 SYRIANAIR (SYR) 1 RG141–RG142October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 16 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

TAAG (ANGOLA AIRLINES) (ANG) 1 RS703 RS742 TAG AVIATION (TAG) 1 RG173 THAI AIRWAYS INTERNATIONAL (TII) 1 RM026–RM027 RS341–RS342 RT691–RT699 RT801–RT803 TRANSJET AIRWAYS (TSX) 1 RB001 RD045–RD046 UNITED AIRLINES (UAL) 1 RA903 RA906–RA907 RB011 RD516 RG091 RM166–RM176 RT411–RT412 RT601–RT630 UNITED TECHNOLOGIES P & W (UTC) 1 RG211 UPS (UPS) 1 RA026 RA029 RA033 RA901–RA902 RA911–RA913 RA915–RA916 RB421 RB605 RD051–RD052 RD054 RD058–RD059 RD571 RD593 UT FINANCE CORPORATION (ZZJ) 1 RA542 VIRGIN ATLANTIC AIRWAYS (VAA) 1 RD356–RD357 RD471 RD474–RD475 RM051 RT945–RT949 WINGS WORLD WIDE (WWW) 1 RG221–RG222 WORLDWIDE AIRCRAFT HOLDING CO. (WAH) 1 RG008 YEMENIA (YEM) 1 RG162 IDENTIFICATION BY VARIABLE NUMBER Variable Group RA001–RA034 1 RA101–RA115 1 RA161–RA164 1 RA201–RA203 1 RA216–RA217 1 RA245–RA246 1October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 17 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

RA251–RA266 1 RA301–RA318 1 RA351–RA360 1 RA369–RA373 1 RA401–RA418 1 RA501–RA502 1 RA521–RA528 1 RA532–RA548 1 RA551–RA552 1 RA559–RA561 1 RA581–RA582 1 RA585 1 RA601–RA602 1 RA631–RA635 1 RA651–RA652 1 RA671–RA677 1 RA701–RA702 1 RA721–RA731 1 RA741–RA745 1 RA749–RA750 1 RA761–RA762 1 RA781–RA784 1 RA901–RA916 1 RB001–RB016 1 RB041–RB044 1 RB071–RB075 1 RB101–RB102 1 RB411–RB413 1 RB421 1 RB601–RB607 1 RB681–RB697 1 RB711 1 RB721–RB723 1 RB741–RB748 1 RD001–RD004 1 RD021–RD022 1 RD041–RD059 1 RD071–RD072 1 RD081–RD083 1 Variable GroupOctober 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 18 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

RD091–RD092 1 RD101–RD104 1 RD121–RD127 1 RD131–RD144 1 RD166–RD167 1 RD171–RD172 1 RD181–RD183 1 RD201–RD204 1 RD221–RD227 1 RD231–RD235 1 RD241–RD243 1 RD251–RD262 1 RD271–RD272 1 RD291–RD292 1 RD301–RD302 1 RD311 1 RD351–RD358 1 RD361–RD366 1 RD381–RD383 1 RD411–RD414 1 RD421–RD426 1 RD431–RD435 1 RD441–RD442 1 RD451–RD456 1 RD461 1 RD471–RD475 1 RD513–RD519 1 RD531–RD533 1 RD551 1 RD561 1 RD571 1 RD581–RD583 1 RD591–RD593 1 RD601–RD607 1 RD621–RD623 1 RD641–RD649 1 RD651–RD659 1 RD661 1 RD671 1 Variable GroupOctober 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 19 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

RD681–RD682 1 RD691–RD692 1 RD701–RD702 1 RD721–RD722 1 RD741–RD742 1 RD751–RD755 1 RD761 1 RD771–RD775 1 RD781–RD783 1 RD791–RD792 1 RE001 1 RG001–RG009 1 RG091 1 RG095 1 RG101–RG104 1 RG121–RG126 1 RG141–RG142 1 RG161–RG164 1 RG171–RG174 1 RG191–RG193 1 RG211–RG213 1 RG221–RG222 1 RH101–RH102 1 RH111–RH112 1 RH121–RH122 1 RJ131–RJ133 1 RJ151–RJ152 1 RJ301–RJ303 1 RJ321–RJ322 1 RJ331–RJ333 1 RM001–RM002 1 RM011–RM012 1 RM021–RM024 1 RM026–RM027 1 RM036–RM038 1 RM051 1 RM071 1 RM081–RM084 1 RM091 1 Variable GroupOctober 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 20 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

RM096–RM097 1 RM116–RM117 1 RM126–RM129 1 RM136–RM147 1 RM156–RM157 1 RM166–RM176 1 RM191–RM192 1 RM231–RM232 1 RM241–RM243 1 RM261–RM264 1 RM316 1 RM801 1 RM811–RM813 1 RM851–RM852 1 RM861 1 RM871 1 RM881–RM883 1 RM891–RM899 1 RR001–RR005 1 RR021–RR025 1 RR031 1 RR201–RR206 1 RR221–RR226 1 RR261–RR267 1 RR301–RR310 1 RR331–RR332 1 RR336 1 RR341–RR345 1 RR361–RR362 1 RR421–RR422 1 RR431–RR432 1 RR441–RR442 1 RR451 1 RR501–RR504 1 RR521–RR522 1 RR526 1 RR531 1 RR551–RR556 1 RR561 1 Variable GroupOctober 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 21 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

RR566 1 RR701 1 RR721–RR724 1 RR746–RR748 1 RR851–RR856 1 RR861–RR862 1 RR951–RR952 1 RS001–RS002 1 RS201 1 RS211–RS212 1 RS221–RS222 1 RS231–RS241 1 RS251–RS259 1 RS263 1 RS265–RS268 1 RS271–RS276 1 RS291–RS292 1 RS301–RS306 1 RS311–RS320 1 RS331–RS333 1 RS341–RS342 1 RS699 1 RS701–RS703 1 RS711–RS713 1 RS721–RS722 1 RS731–RS732 1 RS741–RS743 1 RS751–RS752 1 RS761–RS762 1 RS771 1 RS781–RS782 1 RS786 1 RT001–RT014 1 RT021–RT022 1 RT031–RT035 1 RT041–RT047 1 RT061 1 RT071–RT075 1 RT101–RT103 1 Variable GroupOctober 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 22 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

RT121 1 RT131–RT137 1 RT151–RT152 1 RT161–RT168 1 RT401–RT412 1 RT431–RT447 1 RT451–RT469 1 RT471–RT499 1 RT501–RT535 1 RT551–RT568 1 RT571–RT591 1 RT601–RT657 1 RT671–RT673 1 RT681–RT682 1 RT691–RT699 1 RT701–RT704 1 RT711–RT717 1 RT741–RT757 1 RT776–RT777 1 RT781–RT784 1 RT801–RT803 1 RT811–RT814 1 RT831–RT837 1 RT861–RT864 1 RT876–RT880 1 RT931–RT932 1 RT945–RT949 1 RT951–RT955 1 RT966–RT967 1 RU001–RU006 1 RU016–RU017 1 RU031–RU032 1 RU051–RU052 1 RU059–RU062 1 RU081–RU083 1 RU101–RU102 1 RU121–RU132 1 RU801–RU809 1 RU831–RU841 1 Variable GroupOctober 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 23 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

2. Spares Affected
None. B. Concurrent Requirements
None. C. Reason The changes provided in this service bulletin will help prevent damage to the low pressure oxygen flex hoses that may be subjected to electrical current. An electrical grounding condition can cause the hose to melt or burn. One operator has reported damaged oxygen supply lines on another Boeing model in August of 1997. This damage has occurred due to a short circuit in the 757 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. Revision 1 is sent to advise affected operators of the following: • The NOTE in the Background and Reason section was revised. • The addition of the vendor equivalent oxygen hose part numbers and the addition of the tape part number in the Parts Necessary For Each Airplane section. • The addition of a NOTE at the beginning of the Accomplishment Instructions to clarify which oxygen hoses are to be replaced. • The addition of instructions to remove and install the mask and demand regulator along with the oxygen boxes • The addition of a step in the Accomplishment Instructions to apply protective tape to the hoses. • The addition of Figure 2 for the protective tape application. • The data given in Information Notice 747-35A2101 IN 01 is included in this revision. Boeing Service Related Problem (SRP) 747-SRP-35-0014 is related to this service bulletin.
Note:Operators affected by Boeing Service Bulletin 747-35A2088 should follow the flight deck hose routing and clearance instructions provided by Service Bulletin 747-35A2088. All other operators should follow the instructions in Service Bulletin 747-35A2101. D. Description Remove the crew oxygen boxes. Replace the existing low pressure hoses with new non-conductive hoses. Install the crew oxygen boxes. Functional test the system. Revision 1 - More work is necessary on airplanes changed as shown in the initial release of this service bulletin.October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 24 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

If the protective tape was not applied to the hoses, apply the tape to all the new flight compartment hoses at the next available opportunity. 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. 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. 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. For 747 Classic Airplanes:

For 747-400/D/F Airplanes: 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

Task Number of Persons Man-Hours Elapsed Time (Hours) Access 1 .50 .50 Replace hoses 1 .75 .75 Restore 1 .50 .50 TOTAL FOR EACH AIRPLANE 1.75 1.75October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 25 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

H. Weight and Balance Changes
None. I. Electrical Load Data Not changed. J. References 1. Existing Data: a. Engineering Change Memo PRR 85900-226 b. Service Related Problem (SRP) 747-SRP-35-0014 c. 747 Maintenance Manual (AMM) Subject 35-00-00, 35-11-00, 35-11-07, 35-11-18 d. Boeing Service Bulletin 747-35A2088, “OXYGEN - Crew Oxygen Systems - Prevent Chafing of Oxygen Box Flexible Hose and Microphone Wire” 2. Data supplied with this Service Bulletin:
None. 3. Installation Drawings Used in the Preparation of this Service Bulletin:

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

L. Interchangeability and Intermixability of Parts Refer to Paragraph 2.C., Parts Necessary For Each Airplane, for interchangeability and intermixability information. Drawing Number Title 232U7409 Oxygen Installation - Navigator, Modification 232U8002 Equipment Installation - Crew Oxygen 65B40025 Tubing Instl - Crew Oxygen 65B45015 Tubing Instl - Crew Oxygen (MOD)

Publication Chapter-Section 747 Illustrated Parts Catalog 35-11October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 26 of 40 

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### BOEING SERVICE BULLETIN 747-35A2101

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:
None.October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 28 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

2. Parts and Materials Supplied by the Operator:

3. Parts Modified and Reidentified: See Appendix A - Existing Accountability Table. 4. Parts Removed and Not Replaced: None. D. Parts Necessary to Change Spares See the table in section 2.C.2. Parts and Materials Supplied by the Operator for the Hose Assembly part numbers. E. Special Tooling - Price and Availability
None. QTY Boeing Part Number / Vendor Part Number Name (a) 60B50059-601 / 38001-601 (b) Hose Assy (a) 60B50059-602 / 38001-602 (b) Hose Assy (a) 60B50059-603 / 38001-603 (b) Hose Assy (a) 60B50059-604 / 38001-604 (b) Hose Assy (a) 60B50059-605 / 38001-605 (b) Hose Assy (a) 60B50059-606 / 38001-606 (b) Hose Assy (a) 60B50059-607 / 38001-607 (b) Hose Assy (a) 60B50059-608 / 38001-608 (b) Hose Assy (a) 60B50059-609 / 38001-609 (b) Hose Assy (a) 60B50059-610 / 38001-610 (b) Hose Assy (a) 60B50059-612 / 38001-612 (b) Hose Assy 1 Roll 232U8002-16 (c) (d) (e) Protective Tape(a) For Hose quantity requirements, see Illustrated Parts Catalog 35-11 for customer specific configuration. (b) HydraFlow (V24984) 13529 East 166th Street Cerritos, CA 90703-2203 (USA) (c) Permacel P29 or Scotch 3M, No. 474 protective tape is 3/4 inches wide X 36 yards long. (d) Permacel Division, Johnson & Johnson (V99742) U.S. Highway 101, P.O. Box 671 New Brunswick, NJ 08903 (USA) (e) Minnesota Mining and Manufacturing Company (V26066) 3M Center St. Paul, MN 55144-1000 (USA)October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 29 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

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.October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 30 of 40 

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3. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION 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. The instructions for this service bulletin are only for the replacement of the oxygen hoses located at the captain, first officer, flight engineer, and the observers positions. The replacement applies only to the positions with oxygen mask stowage boxes or panel mounted regulators, and not the standard type passenger masks. 4. Due to the multiple configurations of the 747 Classic and the 747-400, the only Figure that will be shown is the Oxygen Box Hose Typical Locations. B. WORK INSTRUCTIONS CAUTION: OXYGEN SYSTEM COMPONENTS REQUIRE SPECIAL CARE AND HANDLING PROCEDURES. REVIEW THE SAFETY AND MAINTENANCE PROCESSES SHOWN IN THE 747 CLASSIC AND THE 747-400 AMM 35-00-00, PRIOR TO MAKING ANY CHANGES TO THE OXYGEN SYSTEM. 1. Remove the oxygen masks and oxygen stowage boxes or the panel mounted regulators, as shown in the 747 Classic AMM 35-11-07 and 35-11-18 or the 747-400 AMM 35-00-00 and 35- 11-18, or operator's equivalent procedures. 2. Remove the existing low pressure, flex oxygen hoses as shown in the 747 Classic AMM 35-00- 00 or the 747-400 AMM 35-11-18, or operator's equivalent procedure. Note: 1. Make sure 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. 2. Before dicarding the existing low pressure oxygen flex hose, record the part number. See Appendix A - Existing Parts Accountability Table for applicable new low pressure flex hose. 3. If the low pressure oxygen hoses have already been installed as shown in this service bulletin, and application of the tape was not added, apply the tape to the hose at the next available opportunity. 3. Apply protective tape to all of the crew low pressure, oxygen hoses as shown in Figure 2. 4. Install the applicable new, low pressure, flex oxygen hoses as shown in the 747 Classic AMM 35-00-00 or the 747-400 AMM 35-00-00 and 35-11-18, or operator's equivalent procedure.October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 32 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

Note: Make sure that there is a positive separation between the oxygen hoses, structure, electrical wiring and equipment as shown in 747 Classic and 747-400 AMM 35-00-00 or operators equivalent procedures. 5. Install the oxygen stowage boxes and oxygen masks or the panel mounted regulators, as shown in the 747 Classic AMM 35-11-07 and 35-11-18 or the 747-400 AMM 35-11-18, or operator's equivalent procedures. 6. Functional test the crew oxygen system as shown in the 747 Classic AMM 35-11-00, "Crew Oxygen System Operational Test" and "System Leakage Test" or the 747-400 AMM 35-11-00, "Crew Oxygen Operational Test" and "Crew Oxygen Leak Test," or operator's equivalent procedure. 7. Put the airplane back to a serviceable condition.FIGURE 1: OXYGEN BOX HOSE TYPICAL LOCATIONS October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 33 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

FIGURE 1: OXYGEN BOX HOSE TYPICAL LOCATIONS

(TYPICAL CONFIGURATION)HOSES AS APPLICABLE REPLACE OXYGEN BOX HOSES AS APPLICABLE REPLACE OXYGEN BOX

(TYPICAL CONFIGURATION)



### 747-400 FLIGHT COMPARTMENT 747 FLIGHT COMPARTMENTS96677

(SHEET 1 OF 1)FIGURE 2: TAPE APPLICATION October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 34 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

FIGURE 2: TAPE APPLICATION

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. STEP TASK NAME PART NUMBER QTY NOTES 1 Apply Protective Tape 232U8002-16 1 Roll 2 layers of Permacel P29 or Scotch 3M (No. 474) protective tape over entire length of hose. 60 DEGREES 1V27438 OXYGEN HOSE 0.0625 OVERLAP

(SHEET 1 OF 1)APPENDIX A: EXISTING PARTS ACCOUNTABILITY TABLE October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 35 of 40 

### BOEING SERVICE BULLETIN 747-35A2101

APPENDIX A: EXISTING PARTS ACCOUNTABILITY TABLE Existing Part Number RUC Name QTY New Part Number PNC RC 60B50059-19 DIS Hose Assy (a) 60B50059-601 S A 60B50059-20 DIS Hose Assy (a) 60B50059-602 S A 60B50059-60 DIS Hose Assy (a) 60B50059-603 S A 60B50059-62 DIS Hose Assy (a) 60B50059-604 S A 60B50059-69 DIS Hose Assy (a) 60B50059-605 S A 60B50059-70 DIS Hose Assy (a) 60B50059-606 S A 60B50059-81 DIS Hose Assy (a) 60B50059-607 S A 60B50059-94 DIS Hose Assy (a) 60B50059-608 S A 60B50059-95 DIS Hose Assy (a) 60B50059-609 S A 60B50059-101 DIS Hose Assy (a) 60B50059-610 S A 60B50059-129 DIS Hose Assy (a) 60B50059-612 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. RC Replacement Code A - Do not use the existing part to replace the new or changed part.BLANK PAGE October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 36 of 40 

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Table of Contents Revision Transmittal Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2. Data supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . 25 3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . 25 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . 25 2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 C. Parts Necessary For Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 1. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 2. Parts and Materials Supplied by the Operator: . . . . . . . . . . . . . . . . . . . . . . 28 3. Parts Modified and Reidentified: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4. Parts Removed and Not Replaced: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . 29 3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 A. GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 FIGURE 1: OXYGEN BOX HOSE TYPICAL LOCATIONS . . . . . . . . . . . . . . . . . . . . . 33 FIGURE 2: TAPE APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 APPENDIX A: EXISTING PARTS ACCOUNTABILITY TABLE . . . . . . . . . . . . . . . . . . . . . . 35BLANK PAGE October 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 38 of 40 

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### Commercial Airplane Group 

# 747 Service Bulletin

Number: 747-35A2101 

### Evaluation Form Date: October 28, 1999 Revision 1: May 15, 2003 ATA System: 3510 CAS 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) 4 3 2 1 (poor) Please rate the quality of the illustrations: (good) 4 3 2 1 (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 Airplanes Group P.O. Box 3707, Mail Code 2H-36 Seattle, WA 98124-2207 USAOctober 28, 1999 Revision 1: May 15, 2003 747-35A2101 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 40 of 40 

### BOEING SERVICE BULLETIN 747-35A2101