DOCKET NO. SA-516

EXHIBIT NO. 11I

NATIONAL TRANSPORTATION SAFETY BOARDWASHINGTON, D.C.

SERVICE BULLETIN 747-28A-2092

(PAGES I-1 THRU I-22)

HOESNG SERVICE BULtP;TIN NO. 7ll7-,?Y[\2a9:?

CusToMerl c MODEL b CUSTOMEH NO. SERI 6s MFG. SEklAL NO.

GROUP I (CONTINUED)

ni! ( ALITALIAl RASSl 747-143 19

DA (UIILT LSIi nIRwAY:i I

729

R1\301-RA303 747-l 36 1 StJGl ‘I’tltW 19763

BN (l>RANIFFl KA20 1 747-l 30 19746

uo (UOEXNC) 17h001 747-1.21 20235

FT (FLYING TIGER LINES INC. ) RA901 747-123 20100

IM (IrrPenrnL IRANXAN AIR FORCF,) R/t101 747-131 19667 ml02 747-131 19668 Ml03 747-121 19669

IN (AER LINCUS) RA20 3 747-130

JL (JAPAN AIR) RA5tl-RA523 747-146

NW ( NOR’PHWES’r ) Rh35i-RR353 747-151

PA 1 PAN AM&RICAN) itAo 2b RA003 747-121 1lAO 0 4 747-121 RA005-RA007 747-121 RA009-IWO16 747-121 RAOA7-RA020 747-121 RA022-WI024 747-121 RAo25 747-121

TW (TRANS WORLD) Rh104-RA109 747-131

19748

19725 THItU 19727

19770 TllNJ 13700

19639 AND 19630 19637 19640 THRU 19642 19644 THRU 19651 19652 THRU 19655 19657 THIIU 19659 19660

19670. TtIW 19675

I -1lEMA

N610UN

N7470

N800FT

5-0101 S-0106 S-8100

EI -DED

JAUlOl ‘l’f4iW JAR103

~60 Lus ‘IY~RU N60 3US

N747i’A ANI) fd7371’A N731PA N733PA ‘I’ttRU N735I’A N7371’A ‘rtf11U )4741L’A N7 48PA ‘I’HW 1475 A PA N753Ph TIiHU N755PA N7701’A

DOEING SERVIC& DULLETIN HO. -f17-ZDA2092

CUSTOMER b MODEL c CUSTOHEH HO. SE%1 ES

GRUOP 1 (CONTXNUED)

un (UrIITED) RA401 747:122

WY (WORLD AIRWAYS) nnor1 747-124

GROUP II AA (AMERICAN)

RAY 03-Rh907 )1n909rRA910 RA912-TV1914 FM915

AC (AIR CANADA) Rh741-RAT43 RA744bRA745 RA7 50 RA7 49

AF W;sFRANCE’

RA2S6-RAZS8 RAZS9 R4261 Rn262-RA264 RA265 RA266 RD651 RD652 RD653 RR301 RR302 RR303

19753

19733 NB09FT

747-123 20102 TtlRU 20106 N9663 THRU Ii9667 747-123 20108 AH0 20109 N9669 AND N3670 747-123 20324 THRtr 20326 NV672 THRG N9674 747-123 20390 N9675

747-133 747-133 747-133

20013 THRO 20015 CF-TOA THRU CF-TOC 20767 AND 20881 CF-TOD AND C-FTOE 21627 C-CAGB 20977 C-GAG4 747-2338

747-120 20355 F-BPVE m-128 20376 THRU 20378 F-DPVF ‘I’HRU F-BPVH 747-120 20541 N28903 747-128 20543 N20899 747-128 20798 THRU 20800 F-BPVL THRU r320366 7 47-120 20954 F-BPVP 747-128 21141 N40116 747-2280 21326 F-BPVS 747-2280 21429 F-BPVT 747-22aB 21537 Nl252~ 747-228F 20887 NlB815 74?-228F 21255 F-5PVR 747-22Bf 21576 P-DPVV

MFG. SERIAL NO. REGISTRY NO.

H4 703u

74-t-28A2092

CUSTOMER L MOD&L & CUSTOMER NO, SERIES MFG. SERIAL NO.

GROUP IX [CONTINUED)

AI (AXR INDIA) RA722 747-2370 19960 RA723~RA724 747-2370 20459 AND 20550 RA725 747-2378 21182 RA726 747-2378 21446 RA727 747-2378 21473

AR (ARGENTINAS) Rb121 747-2878 21189 RD122 747-2878 21725;

AV (AVfANCR) RBO42 747-124 19734

AT k;W;;L AIR MOROC) 747-2B6B 21615

AZ ;;;;;AL'"' 747-143 19730

RA559bRA560 747-2430 19731 AND 19732 RA561 747-243B 20520

BA (i3RITXSH AIRWAYS ) RA304-RA306 747-136' RA307-RA311 747-136 RA312bRA313 747-136 RA314bRA315 747-136 RA316kR~317 747-136 RA3 18 747-136 RDL316RD132 747-2368 RD133 747-2360 RD134 747-2360 RD13761RDl36 747-2366 RD137 747-2360

Fob 12/79

19764 THRU 19766 20269 THRU 20273 20284 AND 20708 20809 AND 20810 20952 AND 20953 21213 2123.8 AND 21239 21240 21241. 21350 AND 21351 21536

REGISTRY NQ.

VT-EBE VT-EDN AND VT-EUO VT-EDU VT-EFJ VT-EFO

LV-LZD LV-ML0

~1x2000

CK-RYE

I-DEME I-DEMO AND I-DEMU I-DEMB

G-AWND THRU G-AWNC‘ G-AWNG THRU G-AWNK G-AWNL AND G-AWNM G-AWNN AND G-AWN0 G-AWNP AND G-DBPU G-DDPV G-BDXA AND G-BDXB G-BDXC G-BDXD G-BDXE AND G-BDXF G-BDXG

DOElNG SERVICE BULLETIN NO. 7U7-2t.tn20PZ

CUSTOMER b MODEL b CUSTOMER NO. SERIES MFG. SERTAL NO.

GROUP XI (CONTINUED)

DN (BRANIFF) RA761 747-127 20207

CI (CttINA AIRLINES1 RA633 747-132 19898 RD5s1 747-2098 21454 RGl71 747SP-09 21300

CP (CANADIAN PACI FIG) RDlOlbRD1O2 747-2178 2080l AND 20602 RDl03CRD~04 747-2178 20927 AND 20929

CV (CARGOLUX) RR421 747-2R7F 21650

FT (FLYING TIGER LINES INC.) RA902 747-123 20101 RA911 747-123 20323 RA632 747-132 19097 RA634 747-132 20246 RA635 747-132 20247

GN (AIR CADON) RD661 747-2920 21468

IA (IRAQI AfRWAYS) RJ3016RJ302 747-270C 21180 AND 21181

ID (IBERIA) RA5816RA582 747-156 19957 AND 19958 R4585 747-2568 20137

IM (X~~PERIAL IRANIAN AIR FORCE) RA112 747-131 19678 RA161 747-131 20080 R~162 747-131 20061 RAl63 747-131 20082 RROOl&RR002 747"2J9F 21486 AND 21487 RR003 747-2J9F 21507 RR004 7d7-2J9F 21514

Feb 12/79

REC ISTRY NO.

N601DN

D-1860 IS-lQ64 O-1862

CF-CRA AND CF-CR6 C-FCRD AND C-FCRE

LX-DCV

NBOlFT N802FT N803PT NBOIFT NBOSFT

F-ODJC

YI-AGN AND YI-AGO

EC-BRO AND EC-BRP EC-BRQ

5-8102 5-8103 . S-8105 5-8107 s-8113 AND S-8114 s-em S-6116

747-28h2092

CUSTOMER b MODEL 6 CUSTOMER NO. SERIES MFG. SERIAL NO.

CROUP XI (CONTINUED)

IN (AER LINGUS) RA!jOl&RASOZ 747-148 19744 AND 19745

1x (IRAN W'I'IDNAL AlRLINES) RD6Bl 747-2060 21217 RD602 747-2068 21218 RGS016RG102 747SP-86 20998 AND 20999 RC103 747SP-06 21093

JL (JAPAN AIR) RA5246RA525 RA526hRAS27 RA528 RA532-RA334 RA535 RA5376RA538 RA539LRA540 RA541bRA542 RA543 RB601-RB604 RB605 RB606hRB607 RR261

747-146 747-146 747-146 747-2468 747-2468 747-2460 747-2460 747-2460 747-2468 747SR-46 747S~-46 7 47SR-46 747-246~

20332 AND 20528 20531 AND 20532 21029 19823 THRU 19025 20333 20504 AND 20505 20529 AND 20530 20924 AND 21030 21031 20781 THRU 20704 20923 21032 AND 21033 21034

KE (KOREAN AIR LINES) RD071bRD072 74-i-2B58 20770 AND 20771 Rn216 747-2300 20372 RR201 747-230~' 20373

KL (ROYAL DUTCH) RA671-1~1673 747-2068 19922 THRU 19924 Wii674bRA675 747-2068 20398 AND 20399 RA677 747-2068 20427 RD601~RD602 747-2060 21110 AND RD603

21111 747-20CD 21547

RD604 747-2O6B 21548

- . . : . . Feb 12/79 : j "

EP-I/G EP-XAW EP-IACI AND EP-IAB EP- IAC

J&O107 AND JAB112 JA8115 AND JA8116 JAB128 JASlii Ti1RU JA8106 JAB108 JAB110 AND JA8111 JA8113 AND JAB114 JA8122 AND JA8125 JA8127 JA8117 THRU J/i8120 JA8121 JA8124 AND J~6126 JAB123

HL-7410AND HL-7411 HL.7440 HL7441

PW-BUA TtiRU PH-BUC Pti-DUD I\ND PII-BUE PH-BUG PH-DUII AND PtI-BUI PH-BUK PH-DUL

747-.28A2032

CUSfUfltR & MODEL c I CUSTOMER NO. SkRlES NFL. SERIAL NO.

GRUUP 11 (CONTAWEDI

KU LKUYAIT A~RHAYS CORP.1 RDiOl 747-ibYU 21541 RUZOZ -/t-f-2b46 2 1542

I 1

LH (LUFTHANSA) HA217 RAZ45

I

I kOlCll kDA63 KDb% L RDb42 RO 643 Ril b4C Rob45 HRZGY

747-2308 50527 747-2300 io493 747-z 300 215eo 747-t 308 21591 74-t-230B 21220 741-t 208 ill221 74-l-2508 21380 747-2300 2L5Gb 7h?-i3OB 2 lb43 747-2 3OF 21592

LY (EL AL ISRAELI RA7UlCRAt82 747~25bb 2OL35 AND 20274 itA 747 -25&B 20704 RBO43 74?-124 19735 KJl51 7s?-ZSBC 21190 KJ 152 74?-i’36C 2 i594

MO 1AXR HADACASChRI hlr561 7 47-2 B2B i1b14

WE (hIDOLE EAST AIRLINES) RDbZA-R0623 747-k64B 21097 THRU 21099

NH IALL NIPUN AIRWAYS CU. LTD. ReoblfiRB682 74?sR-01 ilb04 hN0 2 1605

NV tN.A.S.4.) KAYClP fst-125 tolo?

i -.. Fob 12/79

REV. 1: Ape 27/79 747-2Un2092

5’1

D-ABYG D-ABYF D-ABYN D-ABYQ D-ABYJ D-AB YK D-AB YL D-ABYM D-ABYR D-ABYtI

4X-AXA AND 4X-AX0 4X-AXC 4x-AX2 4X-AX0 4X-AXF

JR-MFT

OD-AGH THRu DO-ACJ

JAB133 AND JAB), 34

N905NA

GROUP II t CONTIWED )

NH INOKThHES7 ) kAbiJl CRAbOi 747-I 35 19916 AND 1991Y R43:4-UA360 747-l 51 lC?d 1 THRU 15707 RA%+RA~?~ 7s7-2516 i035b 7HRU 20360 RR341-KH343 ?4?-251F 21120 ‘1tlRlJ 21122 Hk344 747-251F ZlZZ1

CIA (CLYMPlC AlkWAYS) RG021LROGZZ 747-284B 23742 ANU 20825

PA [PIN AMiRICAN) RAO26 RAO:f-RAOPi kAYlb kAb31 hC0L’i-RGOOS SGUtJb RG(rD7 kbGYL

747-12L 747-121 747-123 747-i 32 74‘1SP-21 747JP-21 7+7sr-ZL 7-r7iP-21

L9bbl NZf; THRU 20354

198Yb flOZ2 THRU 2AO26 21547 2 1548 ii441

GF (CIANTASI RBWl-Rbou4 hBGO5 CR8006 RtW7CRbD08 hbil09 RBGlC KtlOAl kEOl2 Ku: 13 RGS14 SrtJ515 i40:16thU5~1

747-2988 20009 THRU 20012 747-2386 2053s AND 2033s 747-23ll0 2Oc4i AND 20842 74-I-i366 ZO92l 747-if60 2lC54 7‘t7-238ti 21140 747-z 3ab 2123-I 747-2388 21352 747-2300 ZLH3 747-2386 2A657 747-23160 LL65U AND iljS4

Kb ISYhlAN ARAB AIRLINES) RCI4ALREI42 7473P-94 51174 AND 21175

Fob 12/79 REV, 1: hpr 27/39

747020A2092

2-s

NbZUUS AND NbZluS N604US THRU NblOUS NbAAuS THRU NblSUJ NbleuS THRU N618uS N6 lYlJS

SK-CAA AND SX-GAB

N771 PA Nb52PA 1tIRU Nb59PA NY01 PA N90i PA N530PA THRU N53‘tPA NS 37 PA N533PA N536YA

VI-I-EtlA TtiRU Vh-EBU VII-EdE AND VII-E BF VH-EBG AND W-E ati VH-E 8; vh-E[IJ W-E BK W-E bL Vh-E BM Vh-E8N Vh-t 80 VH-EBP AND ‘JH-ECA

YK-AHA AND Yk-AHB

But 1NG SERV 1CE bULLC1 lw ND- 747-20A2092

.--

. . . . j

CUSTDntR C flDDe~ C CUS7DMCR NO. StRlkS MFG. StRXAL h0.

KJ (ROYAL JORDANIAN‘) RDb91 747-2U38 2125L RDbYi 747-2u38 ZLi!Si

$A lSDUTn AFRICAN) R&071-Rb073 74T-244B 20237 THRU 20239 KB07GiRbD75 747-244?B iO55b &ND 20557 RLlZl-RCl23 747SP-44 21132 THRU ZlL34 RGl24 747SP-44 21253 RG A25 747SP-44 Ti254 RClib 7C7SP-4f 212b3

SB (SEAUOAKL MOkLD) RRZl CRiuU 747 -245F 20826 AND 20627

SK (SCANDINAVIAN) RA701fHA702 74-f-2838 20120 AND 20121 RD591 ?f7-2830 21381

SN (SABENA 1 RBlOltRblOZ 7~7-129 20401 AND 20602

SQ (SYNGAPOKE AIRLINES LTO) RL’JOSlLRD042 747-ZLZB 207&Z AND to713 R0043GK0044 747-2128 ZOlt88 AND 21046 RDOsS 747~ZA28 21162 kDGhb 147-Z 126 21316 RPOG? 747-2120 LA-39

SR tSWISSAIk) RA6I 1 CR A652 341-2570 20110 AND 20117

7Y (T .A.POKTutukSES 1 ROOOlLhOUGi 747-Z 8ZU 205Oi AND 2C5C2 RDu03 C&DC)04 747-2820 2092d AND 21035

Fob 12/79 REV. 1: 9pr 27/79

REGlSTRY Nb.

JY-AFA JY-AFB

2S-SAL THRU ZS-SAN ZS-SAO AND LS-SAP zs-SPh THRU LS-SPC LS-SPD LS-SPE LS-SPF

NTOlSH AND h7025n

SE-DDL AND DY-KHA LN-RNA

GO-SGA AND OO-SC0

‘?v-slA AN0 9V-SIB 9V-SQC AND JV-SOD 9V-SQE PV-SQF 9V-SQG

HB-XC4 AND Hb-I GB

CS-TJA AND CS-TJB AP-AYV AND. AP-AYW

BOEING SERVICE 6ULLETIN ND. 741-2Dir2032

CUSTOMER t MUDEL C CUSTOMER NO. SERIES

GROUP 1I (CONTlNUtU I

TW (TRANS kORLD1 kAll0 ‘147-l 31 hAll3tRAlA4 747-13L hAii5 747-131 kAlb4 747-131

UA LUNI TED ) RA4L2 74?-122 K~403-RA405 747-1i.f kA406CRA407 7*7-122 KA406-R&4 12 747-122 hA413tHA414 747-122 RA+15&RA%A6 747-A22 hA417CR~416 747-l 2%

US (U.S. AIR FORCE) RtCl3tR601~ 747+4A Rb015 747~t4A KBGAb 7470k4b

MFG. SERIAL NO.

19734 19?55 THRU 19757 A9875 AND 14876 19877 THRU 19981 1~892 AN0 19883 A9923 AND 19924 1YS27 AND 19928

2Oeb2 AND 70483 26664 2bS45

UT I UNIUN DE TRANSPUKTS AfR IENS) KK33l f47-203F 2151s

HO IHARDAIR) IiA762 747-101 yotou R0 044 747-iOA iosos HOi 747-iA18 21516

WY IhJRLD AIRWAYS) RJ l31-RJ133 747-27X 20653 1HRU 20653

2. Spares Affected

None

Fcb 12/79 REV. 1: hpr 27179

REGISTRY NO.

N53110 N93115 AND N53llb N53117 NY31 19

N4704U N4710U THRU N4712U N4713U AN0 N4714U N47L6U THRU N47i OU N4 72% ANG N472 7U N47;CLU AND N472 9U N4732U AND N4735U

31676 AND 31677 40787 50 A25

F-GP AN

C-FD JC C-FFUN C-GXRA

N747nA ‘1HRU N749HA

747-29A2092

BOEING SERVICE D’JLLETXN NO. 747-28A2092

8, Reason

This inspection, repair, and modff ication will preclude electrical arcing into main fuel tank6 No. 2 and 3 that may result from damaged wires which provide power to the No. 1 and 4 main fuel tank boost pumps,

Two main fuel boost pumps for each of the Nos. 1 and P main fuel.tanks are loclted in a dry buy area (dog house 1 near the outboard end Of the NOB. 2 and 3 main fuel tanke. Electrical wiring to the pumps is ins talled in aluminum conduit routed through the Nos. 2 and 3 tank6 between the wing rear spar and the dog house.

Recently, one operator, investigating the cause of a fuel leak in an auxiliary fuel tank, found a small hole burned through the conduit that houses the electrical wires to the auxiliary fuel tank pump. Reportedly, a wire had abraded against the inner conduit wall, exposing the condu c tot r and arcing from the conductor to the condu it produced the hole through which fuel escaped. Alert Service Bulletin 747-28A2091 was released to four affected overseas operators and recommended an inspection, repair, and modification of auxiliary fuel tank pump wiring.

The conduit and wiring installations’ for the Nos. 1 and 4

I

fuel tank boost pumps arc similar but not identical to the auxiliary fuel tank installations. 4n inspection of the main fuel tank boost pump wiring was initiated on selected airplane groups in order to evaluate the possible extent that wire chat ing may exist in the fleet. Partial results of the survey to date indicate the existence of chafing and/or abrarion in varying degrees of the main boost pump wire insulation. Damaged wires were repotted on airplane6 that had accumulated approximately 40,500, 23,000, 22,000, 20,000, and 15,000 flight-hours, NO wires were reported that had worn through the insulation to the conductor,

In summary, of 25 wire bundle8 inspected, 16 were reported to have some degree of damage. abras ion

The teported chafing and is attributed to vibration of the wires against

the conduit wall. Initial from the indicate

findings survey that the degree of

related to airplane flight-hours. wire insulation damage is

’ -. _- ! Feb 12/79 747-28A2092 . - REV, 1: AQr 27f79

I30i%xNG SERVICE PULTXT’IN NO, 747-2nn2032

C. Description

The NOS. 1 and 4 main fuel tank 10rwsrd and aft EUC~ boost pump wire bundles betWe@n aach pump and the wing ccar spar should be inspected for chafing and abrasion or other damage : repaired or replaced as necessary; and, mot1 i f i cd by providing additional protect ion uguinst clsmurjc.

Inspection of each wire hu nd lc rcqui r’cs rcmovc~ 1 of electrical connectors at the pump and pulling the wirer; out of the conduit at the wing rear spar. The wires should then be cleaned and closely inspected for damage. Damaged wires should bc replaced or ropaircd as necessary. rf electrical arcing or burning is evident, the conch i t should be inspected, and replaced iP nccrasary.

Terminating action consists of tying the wire bundles at six inch intervals and installing two concentric tcf lon 6 leevcs over the wires. The wire bundle is then reinstalled in the conduit, the electrical connectors are reinstalled, and the boost pump should be operationally checked.

nf fected airplanes arc divided into two groups. Group I aicplunes (line position 001 through 0541 were do1 ivercd with boost Pump wires that exhlbi t better wear characteristics than the wires on later ( Group 111 airplanes.

It is recommended that the inspection, repair, and terminating action be accomplished at the next I planned maintenance period on Group I airplanes with less than 30,000 flight-hours and on Group II airplanes with l@SS than 6000 flight-hours.

It is recommended that the inspect. ion, repair, and terminating action be accomplished on

30,000 or more flight-hours, Croup r airplanes

with and on Group II airplanes with 6000 or more flight-hours, at the earliest opportunity when ma npowor and Eacilitics are available uithin the next 750 flight-hours or two months calendar time, whichever is earlier,

Revision 1 changes the type of knot used to tie the wire bundles prior to sleeving, It also deletes an airplane, previously modified at Doeing, from the effectivity.

Airworthiness Directive 79-06-02 has beon isaucd on this subject.

Ft?b 12/79 REV. 18 npr 27m

BOEING SERVXCE BULLETIN NO. 747-28A2092

D.

E.

F.

Approva 1

The inepectfon and rework described herein has been approved by the FAA Designated Engineering Representative at the Booing Commercial Airplane Company and coordinated with FAA Northwest Region Engineering and Manufacturing Branch NW-210.

Manpower

Approximately 20 man-hours and a crew of 4 men 6rQ required to accomplish this modification per airplane.

Material - PrfcQ and Avallabil ity

The kits identified in Paragraph XI,A. may be obtained from Boeing within tht terms and conditions defined below. After expiration of the quotation, price and delivery data wS11 be provided upon requttst,

The delivery quotation below indicates the date when initial. kits will be available. When source capacity is limited and tooling Or material availability is the pacing factor, cue tomer pUrCha8Q orders will receive an allocation, from the available quantities, based on receipt date of purchase order by the Spates Department and based on operator’s planned modification scheduies. It is therefore requested that customer purchase orders include planned date8 of incorporation.

Kit Number Description Delivery Unit Price

61874794-629 Kit, Standard Avai lablt Airplane8

No Charge

61874794-630 Kit, SP Available No Charge Ai rpl anc8

Date February 12, 1979

The prices quoted art subject to the terms and conditions of Boeing~s standard purchase order Ouota t iono

acknovlsdqement. rre.subjQct to acceptance within 120 days from

date hereon,

Any items which are offered at "No Charge” are subject to Charge after expiration Of the 120-day period,

Prices quoted in United States Dollars. Terms: Net 30 days.

Address purchase orders and correspondence pertaininq to this quotation to Director of Sparus, and refer to this service bulletin number.

Fob 12/79 REV. 18 Apr 27/79

NO. 747-28A2092

G. Tooling - Price and Availability

None

ti . Neight and Balance

No Change

I. Rc ferencos

1, Existing Data:

a. Engineering Change Memo PRR 79382

b. 741 Wiring Diagram Manual Chapter 20 and Subjects 28-22-31 and 28-22-32

C. 747 Maintenance Manual Subject 28-22-00

d. Poeing Service Letter 747-SL-28-19, dated February 5, 1979

2. New or revised data supplied in support of this bulletin:

None

J. Publications Affected

None

Feb 12/79

BOEING SERVICE BULLETIN NO, 74-l-28&2092

II, Material Informatfon

A. Part8 Required Per Airplane

The follonina kit ao8rmblies may bc obtained from Bocinq ar noted in Piragraph I.P.:

61874794 - KIT, FUEL BOOST PUMP

-630-629 Quantity Part Number

SLEEVE ADDITION

Nomcncla ture

Kit, Standard Airplane Kit, SP Airplane Sleeve, Teflon (74 Inches, Size 4) Sleeve, Teflon (74 Inches, Size 0) Sleeve, Tefion (68 Inches, Size 4) Sleovc, Teflon (68 Inches, Size 0) Sleeve, Tcfion (71 Inches, Size 4) Sleeve, Teflon (71 Inches, Size 0) Sleeve, Teflon (72 Xnchee, Size 4) Sleeve, Teflon (72 Inch@&, Size 0) Sleeve, Teflon (78 Inches, Size 4) Sleeve, Tef ion 178 Xnchcs, Size 0) Sleeve, Teflon (73 Xncheb, Size 4) Sleeve, Teflon (73 Inches, Siee 01 Sleeve, Teflon (74 Inches, Size 4) Sleeve, Teflon (74 Incher, Size 0) Sleeve, Teflon (86 Inches, Size 4) Sleeve, Teflon (88 Inches, Size 0)

i 61874794-629 61574794-630 61874794-62901

61874794-62902

61874794-62903

1 .

1 .

1 6iB74794-62904

61874794-62905

61874794-62906

61874794-62307

61874794-62908

61874794-63001

1 ‘\ .

2.’ _a-’

. 1

1 .

i .

1 .

61874794-63002

61874794-63003

61874794-63004

61874794-63005

61874794-63006

61874794-63007

61874794-63008

.

*

.

1

1 .

1 .

Fob 12/79

BOEXNC SERVXCE BULLETIN NO. 747-28A2092

8. Parts Required to Modify Spares

None

C, SpccLal Tool8 and Equipment Required

None

D. Existing Parts Accountability

None

.

Y\ .f 1

Fcb 12/79 .‘ii-

BOEING SERVICE BULLETIN NO. 747-26A2092 :i

t

III. Jbccomplishment Instruction6

NOTE : The following accomplishment

paragraphs oi;iine instructions

the general detailed test

requirements. The suggested sequence of operations and detailed accomplishment instructions are indicated by circle notes on the figures,

A, Open the following circuit breakers:

Location Nomenclature (Panel) --- NO. 1 AFT L NO, 4 FWP P12 BOOST PUMP CONTROL

NO. 1 MAIN AFT BOOST PUMP Pl4

NO. 4 MAIN FWD BOOST PUMP P14

NO. 1 FWD i NO. 4 AFT BOOST PUMP CONTROL

P12

NO. 4 MAIN AFT BOOST PUMP Pl5

NO, 1 MAIN FWD BOOST PUMP Pl5

F/E IND LTS 4 P12

F/E IND LTS 5 P12

B. Remove access panel from applicable boost pump dog house (two pet wing). *

C. Inspect and rework wire bundle per Figures 1 and 2.

Fcb 12/79

BOEING SERVICE BULLETIN NO. 747-28A2092

D. Confirm proper phase scquencct ustng liS/ZOOv ac, 3-phase, ABC phase sequence meter, nominal 400 cps 0s tollors:

1. At each pump, bcCorc attaching the ~luq to the receptacle; insect phase r;cqucn&g n&x. -

2, Ensuse that the phase ooqucnce on the plug is A for pins No. 1, 2, and 3.

3. Check for continuity to ground on pin No. 4.

NOTE : For phase check, close only the appl i pump circuit breaker and ac bU8 c i

B, c

cable rcuit

breaker prior to actuating each switch on the P4 panel.

E, Rcs tore dcCes6 panel and close circuit breakers; perform operational check of pump (Ref: 747 Maintenance Manual Subject 28-22-00).

SEE DE'I

DOEINC SERVICE BULLETIN NO. 7U7-28&2092

WING REAR SPAR

,’

./

0 1 Unclamp wire bundle W1210, W1214, (and 61602 at left side inboard position) , WI216 or W1212 inside pump doqhouse (located approximately at wS708, WS680, KS680 a& WS708, respectively),

@Disconnect pump connector DM22, DMZ8, DM27 or DM32 and pressure switch connector 1x562, DS63 (and DS106), DS72 OI DS71, respectively. Remove connectors from bundle.

@Attach pull cord to pump end of bundle (in order to reinstall iq condujt after inspection and slcevinq).

FIGURE 1. WIRE eiUNDLE INSPDCTION AND REWORK

Feb 12179

BOEING SERVICE BULLETIN NO. 747-28A2092

. . . .

/’ 56 A u

u PUMP DlYGHOUSi (2 PLACES)

DETAIL 1

LEFT WI NC 1NSTALLAT 1 UN SHOWN

RIGHT WING OPPDSITE

PXGURE 1 t WIRE BUNDLE INSt’ECTION AND RGWRK

Fab 12/79 REV. 1: “Qr 27/79

BOEING SERVICE DULLETXN NO. 707-28A2092

0 4 Remove bundle from clamp on rear ride of roar spar (inboards located at approximately WS692 and outboards at WS771). .

NOTES: 1, Outboard positions may require removal of second, lowor clamp to allow easier handling of bundle,

2. Right side outboard position. requires extra effort and time due to proximity of cable pulley.

0 5 pull bundle out of conduit from rear side of rear spar. Tie off pull cord at doghouse end so it will not be inadvertently

I drawn through. Remove any wire ties that served a8 a manufacturing facility and were inadvertently left installod on the wire bundle.

0 6 NOT SHOWN - Clean wires using approved solwnts (Ret: 7Y7 Wiring Diagram Manual Chapter 20). Inspect wire6 for burn damage or chaf inq, Repair or replace damaged or chafed wire as applicable (Ref: 747 Wiring Diagram Manual Chapter 201. . NOTE: xf wire replacement is required, ensure that wires are

spliced at a location such that the splices will be outside of the conduit.

0 7 If electrical arcing or burning is evident the conduit should be inspected, and replaced if necessary.

0 8 Tie wire bundle and encase in two concentric teflon sleeves; I Size 69 inner; Size 10 outer per Figure 2.

0 9 Reinstall tied double-sleeved wire bundle in conduit using pull cord. Detach pull Cord.

NOTE : Sleeves should extend from under pump connector clamp thru clamp on rear face of rear spar. No cutting of sleeves should be necessary; under no condition should sleeve6 be trimmed while on bundle.

0 10 Reinstall clamps, ensuring sleeving is under clamps,

NOTES : 1. Replacement of clumps with larger size may be required due to additional thickness of two sleeves.

2. Ensure, also, that wire bundles arc not pulled taut inside the conduit.

0 11 Reinstall connectors on wire bundle and make continuity check (Ret: 747 Wiring Diagram Manual Subjects 28-22-31 and 28-22-32.

FIGURE 1. WIRE DUNDLE INSPECTION AND RrSWbRK

7U7-28A2092 Feb 12/79 REV. 1: Apr 27179 ‘y

BOEING SERVICE BULLETIN NO. TUT-28h2092

PUMP CDNNECTOR

REAR SPAR REAR SPAR

1 1 h--e -a. h--e -a.

ml!fTmm~~:~ ml!fTmm~~:~

INNER TEFLON INNER TEFLON OUTER TEFLON OUTER TEFLON

‘PRESSURF SWlTCH SLEEVE SLEEVE

CONNECTDH

0 1 Dcfore installing sleeves on inspected/repaired wire bundle, tie bundle at 6.0 inch (maximum) intervale, using knot8 pre- scribed In 747 Wiring Diagram Manual Subject 20-10-11 (clove hitch and square knot or clove hitch and surgical knot), or the equivalent over the length to be encased in sleeve. See information below for corzcot Sleeve part number and length for each bundle.

0 2 (NOT SHOWN1 - Remove pull card from end of bundle and attach second, separate pull cord.

0 3 Install sleeve (size 14) over bundle using pull cord. Slide sleeve (size EJI over first sleeve.

0 4 (NOT SHOWN) - Remove pull cord and reattach cord which runs through conduit.

NOTES: 1. Whexs 4 wire Contacts (6iZe #12) will not fit into sleeves, one wire may be bent and taped back (3 contacts will feed into sleeve and fourth will follow) - Do not bend wire back sharply; maintain emooth bend.

2. "Mate - with" tag may be removed from third bundle at left Inboard location to fit bundle . into rlceves.

Part No6 (size U 0 Size 0) Part Nos. (Size 4 6 Size 01 Position r747-lOO/-200, (747 SP)

I$-Outboard 61874794-62901 G -62902 (74") 61D74794-63001 t -63002 (7n") G-Inboard 61B74794-62303 6 -62904 (68") GlB74794-63003 E -63009 (73") RS-Inboard 61874794-62905 t -62906 (71") 61074794-63005 & -63006 (7U") W-Outboard 61D74794-62907 C -62908 (72") 61D7479Q-63007 & -63008 (89")

FIGURE 2. WIRING WNDLE TYING AND SLEEVING

Feb 12,'79 REV, l! Apr 27179