REFERENCE: BULLETIN 28-53

SUBJECT: FUEL

- Indicating

- Install Low Fuel Pressure Indication System. COMPLIANCE: DouglasAircraft Company recommends accomplishment at the earliest practicalmaintenance period.

ANALYSIS: One operator reported one instancewhere 11,000pounds of fuel remained trapped in the centerwing fuel tank with 800 pounds of fuel remaining in each main tank. The
excess fuel in the center wing fuel tankhas been attributed to failure of a boostpump. Failure of a center tank boost pump can result inpremature use of main tank fuel. MANPOWER:
TotalMan-Hours Total ElapsedHours All Groups
295.3

49.2

MATERIAL INFORMATION: Parts required may be purchased as a completekit from DouglasAircraft Company, ormay be procured as indicated. (Seeparagraph 3.A of Service Bulletin 28-53.)

DESCRIPTION: All Groups

- Accomplishes the following: (1) Installs two low fuel pressure switches and associated tube assemblies on centerwing fuel tank boostpumps located between stationsXcw -58.688 andXcw -104.500. (2) Installs a relay bracket, bus assembly, relay, and receptacle in the electricalpower center (EPC) at stationY-160.000. (3)Modifies annunciatorpanel. (4) Revises aircraft wiring to accommodate low fuelpressure system. Incorporation of a low fuel pressure indication systemwhich utilizespressure switches and an annunciator caution lightwill provide timely indication of a failedboost pump condition.

EFFECTIVITY: DC-9-81, -82, -83, and -87 (MD-81, -82, -83, and -87);MD-88 aircraft. (SeeService Bulletin 28-53 fordetailed Effectivity.)



## April 8/91 Reference Bulletin 28-53

Revision 1 April 16/92 Page 1 of IFUEL

- Indicating

- Install Low Fuel Pressure Indication System.

This page transmits Revision 1 forMD-80 Service Bulletin 28-53 to incorporate the following changes:

NOTE: This revision constitutes a complete reissue and reflects current operators of affected aircraft at time of issue.

Reason forRevision: 1. To identify additional access requirements for aircraft equippedwith auxiliary fuel tanks.

2. To clarifyAccomplishment Instructionswhich are required for installationof correct structural doublers.

No additionalwork is required by this revision for aircraftmodifiedper prior issue of this Service Bulletin.

Page 1: Changed page number to 1 of 29, was 1 of 31.
Page 10: Revised paragraphunderManpower.
Page 12: Added the following to References:

Data Identification Change Type of Data

SM09570003 G and H Advance E.O.
Changed the followingin References: Change Data Identification Is Was Typ`eofData

SR09280010 D C Service ReworkDrawing SR09280014 H F Service ReworkDrawing SR09280029 C A Advance E.O.
Changed service rework drawingnumber underparagraph 1.J.(5) to SR09280026,was SR09570026.

April 8/91 Bulletin 28-53
Revision 1 April 16/92 Page 1 of 3Page 13: Added paragraphs 1.L and 1.M.
Pages 16 Added new paragraph 2.B.(8).

and 17: Revisedparagraph 2.C as follows:

Added paragraph 2.C.(1) and 2.C.(6).
Changed the following partnumbers:

SM09570003-11 SM09570003-3 SM09570003-13 SM09570003-5
Page 18: Revisedparagraph 2.G for indication of legendplate to read "CENTER FUEL PRESS LO", was 'FUEL LEVEL LOW."
Page 20: Added newparagraph 2.U. Reidentified subsequentparagraphs accordingly.
Pages 22 Revisedparagraph 3.A.(1).

thru 25: Deleted Groups 11 through 14.

Added SB09280053-7 and -9 servicekits to Groups 9 and 10.
Changed unitnet prices to reflect currentpricing policy.
Changed the followingpart numbers:

Is W
(YAE22-G15GN) (YAE22-G15-1) 5D0086-2 5D0086-5

(YAE22-G134GN) (YAE22-G13-1)
Revised part number quantities in SB09280053-11 fastener kit under
footnote i/.
Added part number HLT436-8-10pin to SB09280053-11 fastener kit under footnote 5/.

Bulletin 28-53 April 8/91

Page 2 Revision 1 April 16/92Page 27: Added paragraph 3.A.(2). Reidentified subsequentparagraphs accordingly.

Added legendplate toparagraph 3.A.(3). (Incorporation of Service Bulletin Change Notification 28-53 CN1, dated April 19/91.)
Revisedparagraph 3.A.(4).
Pages 28 Revisedparagraphs 3.A.(5), 3.A.(6), and 3.A.(7).

and 29: Changed CAGE number to 98571,was 35012 under footnote23/.

NOTE: Service Bulletin28-53 Summary is attached.

RZV LL-1
April 8/91

Revision 1 April 16/92 Bulletin 28-53

Page 3BULLETIN28-53

QITE
This Service Bulletin is issued as a record-type change. Aperture cards and/ordrawings are furnished in lieu of illustrationstoperform thismodification.

1. Plannina Information:

A. Effectivitv:
(1) Aircraft Affected:

DC-9-81. -82. -83. and -87 (MD-81.-82. -83. and -87): MD-88

(a) Operator and Aircraft Number:
Operator Factory Serial No. Ooerator Factory SerialNo.

AA 49145 49155 49158 49161 49167 49171 49251 49253 49269 49286 49331 49451 49468 49553 49558 49592 49647 49675 5

and thru and thru

thru thru thru thru thru thru

thru thru thru thru 49159 49163 49168 49181
49259 49273 49329 49353 49460 49477

49566 49601 49656 49684 

### AA 49730 (cont) 49797 49890 49915 49987 53025 53083

AM 49761 49763 49926

48067 48083 49149 49188 thru thru thru thru thru thru and 

### 49739 49806 49899 49924 49996 53034 53084

thru 49765 thru 49929

thru 48069

thru 49190 

### 49660 49667



### April 8/91 

## Bulletin 28-53

Revision 1 April 16/92 

### Group

5 

### (cont)

3

5

8

Page 1 of 29Operator Factory Serial No. Grouf

AO 49642 53050 and 53051

49668

AS 48079 and 49103 and 49111 49386 and 49643 49657 and 49825 49925 48080 49104
49387
49658

53052

49231 thru 49236 49363 thru 49365 53018 thru 53024

49126

AU 49784 

### 49934

48024 and 

### 48050 48025

AY 49403 thru 49405

49150 thru 49152 49252 

### 49284 49625 

### 49741 49877 49904 thru 49906

AZ 53053

49192 thru 49221 49430 thru 49435 49549 thru 49552 49794 thru 49796 49969 thru 49975

BW 49632 49786 

### 49789 BW 49390 (cont) 49400 49448 49568 49575 49824

CBF 49415 49425 49428 49502 49505 49508 49510 49512 49514 49516 49518 49520 49522

CEA 49140 

### 49355 49501 49503 49507 49509 49511 49513 49515 49517 49519 49521

CO 48027 48044 48056 48062 48066 48073 49102 49112 49116 49120 49125 49391 49439 49441 

### 49444 49450 49525 and 49506

thru 49524

and 49141

and 49504

and

and
and

thru thru thru 48045 

### 48063

48074

49114 49118 49122 

### thru 49394

and 49526



### Bulletin28-53 April 8/91 

### Revision 1 April 16/92 Page 2 Qperator Factory SerialNo. GrouoOperator Factory SerialNo. Group Operator

CO 49127 (cont) 49222 49229 49246 49249 49260 49370 49478 49580 49634

DL 49532 49573 49583 49591 49644 49705 49711 49810 49878 49976 53115 53161 53172 53214 53241 8

and thru and thru thru and 49250 49265 49371 49494 49582 49635 

### thru 49546 3
and 49584 KE 49785 49787

49373 and 49374 49416 thru 49419
LM 49123 and 49124

49661

LV 49788 49793

49395 49567 49659 thru 49646

thru thru thru thru and

and and thru 49723 49819 49887 49984 53116 ML 49727

NW 48054 48057 48086 48088 49110 53173 53215 53243

IB 49827 thru 49843 53207 thru 53213

IG 49901

49247 49531 49669 49740 and 49248 OS 49411 49888 2

3

9

JD 49464 thru 49467 4 48015 48059 49115 49164 49278 49372 49933

SK 49605 49614 and 48055

thru 48091

thru 49414

thru 48021

and 49279

thru 49612

48029 48070 49280 49461 49820 49907

JP 48046 48087 49379 49440 thru thru thru thru and and 48033 48072 49283 49463 49821 49908 

### thru 48048 5 49603 49613 49615 49728 49909 49998 53000 5 49380 49420 49436 49554

April 8/91 and 49604

thru 49914 and 49999 thru 53002

thru 49385 thru 49424 thru 49438 and 49555

Bulletin 28-53
Revision 1 April 16/92 Factory SerialNo. Group

Page 3Operator Factory Serial No. Grou

SR 48002 49100 49356 49570 49844 53149

TW 49153 49156 49160 49165 49169 49182 49230 49245 49266 49426 49527 thru 48014

thru 49359 thru 49572

and 53150

and 49154 and 49157

and and thru

and and thru 5 XRI 49708 49710

XYX 49760 49762

XZA 49845 49848 5
49724 49779 49166 

### 49170 49187 X7C 49628 and 49629 49791 and 49792

49267 49427 49530

49701 thru 49704 8
US 48028

48026 48034 48049 48052 48092 49119 49138 49142 49237 49429 49443 thru 48043

and 48053 thru 48099

and 49139 and 49143 5

7

XLL 49846 and 49847 1 X9D 49940

YBB 49101 49277 49569 49930

YGA 48022 49398 49619

YHG 49939 49942

YMP 49144

YPA 49556 49663

YUZ 48051 48058 and 49620

and 49557

49670 and 49671 49767 and 49768 4 ZD9 49935 49941 

### thru 49937

5

and 49857 thru 53015 ZJ7 49574 49622 49624 49626 49826

ZL1 49576 49662 49707 49822 49968 and 49823

Bulletin 28-53
Page 4 

## April 8/91 Revision 1 April 16/92 MeOamlwsoumCp,m, .f.n ,VTi¢t

.. Uor d THESEDATASUSJIT TO imm, nifVE LEGD ONT1LEPAGE ORFST PAGE. 49402 49449 49602 49769 49854 49856 53012 Operator Factory Serial No.Operator Factory SerialNo.

ZMF 49889 53017

ZOP 49759 49766 53044 thru 53046
49366 thru 49369
ZQE 49442
ZQ8 49807 and 49808
Z1J 49631

49401

Z2K 49931 and 49932
Z2Y 49673 49777

49938
Z3V 49585 thru 49587 49641 

### Group

3

3

5
5

3
3

5
3

2

3
4 Operator Factory Serial No. Grou
Z6K 49389 4 49706

49396 and 49397 5 49578 49623

Z7G 49780 2
Z7I 49725 and 49726 2 49778

Z9R 49627 3 49630 49790 49900

49577 5 49579 49621 49672

Z9U 49399 5 49617 and 49618 49855

49709 8 (b) Other Aircraft:
Factory Serial No. Group

48000 and 48001 5

NOTE: Aircraft listedunder OtherAircraft are affected by this Service Bulletinbut were not assigned to any specific operator at time of Service Bulletin issue.

April 8/91

Revision 1 April 16/92 Bulletin 28-53
Page 5(c) Manufacturer's Fuselage and FactorySerial Numbers:

FUS (FSN) FUS (FSN) FUS (FSN) FU (FSN) FUS (FSN
909 (48000) 917 (48001) 924 (48015) 938 (48002) 941 (48016) 944 (48003) 946 (48034) 948 (48024) 950 (48004) 952 (48025) 953 (48029) 955 (48035) 957 (48005) 958 (48017) 960 (48026) 962 (48030) 963 (48035) 965 (48037) 966 (48006) 967 (48044) 969 (48031) 970 (480 5) 971 (48007) 973 (48027) 974 (48052) 975 (48051) 977 48046) 978 (48032) 979 (48028) 981 (48008) 983 (48049) 985 (48009) 986 (48053) 988 (48033) 989 (48050) 991 (48058) 992 (48010) 994 (48011) 995 (48018) 996 (48054) 997 (48012) 998 (48047) 999 (48070) 1000 (48013) 1001 (48019) 1002 (48038) 1003 (48039) 1004 (48071) 1005 (48048) 1006 (48040) 1007 (48055) 1008 (48041) 1009 (48042) 1010 (48043) 1011 (48072) 1012 (48056) 1013 (48014) 1015 (48062) 1016 (48079) 1018 (48073) 1019 (48066) 1020 (48063) 1022 (48080) 1023 (48057) 1025 (49100) 1026 (48074) 1028 (48067) 1029 (48086) 1031 (48068) 1032 (48069) 1034 (48092) 1035 (48087) 1037 (48088) 1038 (48089) 1040 (48090) 1041 (48091) 1043 (48083) 1045 (48020) 1047 (48059) 1049 (48093) 1051 (49101) 1053 (48094) 1055 (48095) 1057 (48096) 1059 (48097) 1060 (48098) 1061 (49116) 1062 (49110) 1063 (49117) 1064 (49111) 1065 (49118) 1066 (49114) 

### 107 (48099) 1068 (49112) 1069 1070 1071 1072 1073 1074 

### 1075 1076 1077 1078 

### 1079 1080 1082 1083 1085 1086 1087 1088 1089 

### 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 

### 1100 1101 1102 1103 1104 

### 1105 1106 

### 1107 1108 

### 1109 1110 1111 1112 1113 1114 

### 1115 1116 1117 (49113) (49119) (49120) (49121) (49122) (49125) (49123) (49102) (49124) (48021) (48022) (49126) (49127) (49103) (49104) (49149) (49150) (49151) (49152) (49138) (49139) (49140) (49141) (49142) (49143) (49144) (49145) (49166) (49167) (49168) (49153) (49154) (49155) (49156) (49157) (49158) (49159) (49160) (49161) (49162) (49163) (49171) (49172) (49173) (49174) (49175) (49165) 1118 

### 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 

### 1155 1156 1157 1158 

### 1159 1160 1161 1162 1163 1164 (49169) (49170) (49176) (49177) (49178) (49179) (49180) (49181) (49192) (49193) (49182) (49183) (49194) (49184) (49185) (49186) (49187) (49115) (49195) (49196) (49197) (49222) (49229) (49230) (49198) (49199) (49237) (49245) (49246) (49200) (49201) (49249) (49260) (49247) (49248) (49261) (49251) (49253) (49254) (49255) (49256) (49262) (49257) (49258) (49259) (49263) (49269) 1165 (49270) 1166 (49271) 1167 (49272) 1168 (49273) 1169 (49252) 1170 (49202) 1171 (49264) 1172 (49188) 1173 (49189) 1174 (49203) 1175 (49286) 1176 (49287) 1177 (49231) 1178 (49232) 

### 1179 (49204) 1180 (49190) 1181 (49277) 1182 (49164) 1183 (49278) 1184 (49205) 1185 (49265) 1186 (49250) 118 (49288) 1188 (49206) 1189 (49207) 1190 (49208) 1191 (49209) 1192 (49210) 1193 (49289) 1194 (49280) 1195 (49290) 1196 (49366) 1197 (49367) 1198 (49368) 1199 (49369) 1200 (49281) 1201 (49373) 1202 (49211) 1203 (49233) 1204 (49234) 1205 (49379) 1206 (49370) 1207 (49371) 1208 (49374) 1209 (49284) 1210 (49291) 1211 (49292)

Bulletin 28-53

Revision 1 Apr11 8/91
April 16/92 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 

### 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 (49293) (49294) (49295) (49296) (49297) (49298) (49299) (49300) (49301) (49302) (49303) (49304) (49355) (49380) (49305) (49306) (49307) (49308) (49279) (49381) (49382) (49212) (49235) (49236) (49383) (49384) (49266) (49267) (49425) (49428) (49429) (49213) (49385) (49214) (49309) (49310) (49311) (49312) (49356) (49357) (49372) (49215) (49420) (49313) (49314) (49315) (49316)

Page 6

### fUI FSN f1U FSN fU~ {Fi EUS FSN FUS FS FUS FSN 1259 (49317) 1309 (49482) 1360 (49491) 1410 (49469) 1460 (49559) 1510 (49596) 1260 (49415) 1310 (49219) 1361 (49492) 1411 (49582) 1461 (49658) 1511 (49597) 1261 (49402) 1311 (49333) 1362 (49531) 1412 (49411) 1462 (49560) 1512 (49607) 1262 (49216) 1312 (49334) 1363 (49504) 1413 (49574) 1463 (49671) 1513 (49598) 1263 (49421) 1313 (49448) 1364 (49493) 1414 (49575) 1464 (49617) 1514 (49510) 1264 (49422) 1314 (49483) 1365 (49538) 1415 (49556) 1465 (49579) 1515 (49599) 1265 (49318) 1315 (49484) 1366 (49539) 1416 (49541) 1466 (49667) 1516 (49600) 1266 (49319) 1316 (49485) 1367 (49567) 1417 (49470) 1467 (49668) 1517 (49609) 

### 1267(49320) 1317(49486) 1368 (49494) 1418 (49471) 1468 (49572) 1518(49601) 1268 (49217) 1318 (49439) 1369 (49580) 1419 (49634) 1469 (49573) 1519 (49613) 1269 (49390) 1319 (49220) 1370 (49344) 1420 (49635) 1470 (49583) 1520 (49647) 1270 (49391) 1320 (49335) 1371 (49345) 1421 (49642) 1471 (49584) 1521 (49648) 1271 (49416) 1321 (49336) 1372 (49346) 1422 (49576) 1472 (49586) 1522 (49611) 1272 (49392) 1322 (49441) 1373 (49347) 1423 (49643) 1473 (49644) 1523 (49713) 1273 (49321) 1323 (49444) 1374 (49348) 1424 (49412) 1474 (49561) 1524 (49714) 1274 (49218) 1324 (49450) 1375 (49349) 1425 (49507) 1475 (49562) 1525 (49405) 1275 (49363) 1325 (49337) 1376 (49350) 1426 (49472) 1476 (49464) 1526 (49649) 1276 (49364) 1327 (49338) 1377 (49431) 1427 (49473) 1477 (49462) 1527 (49650) 1277 (49365) 1328 (49339) 1378 (49432) 1428 (49433) 1478 (49701) 1528 (49651) 1278 (49417) 1329 (49340) 1379 (49554) 1429 (49662) 1479 (49702) 1529 (49652) 1279 (49393) 1330 (49221) 1380 (49568) 1430 (49404) 1480 (49645) 1530 (49715) 1280 (49322) 1331 (49397) 1381 (49505) 1431 (49474) 1481 (49646) 1531 (49716) 1281 (49323) 1332 (49398) 1382 (49527) 1432 (49475) 1482 (49509) 1532 (49717) 1282 (49282) 1333 (49389) 1383 (49528) 1433 (49542) 1483 (49619) 1533 (49718) 1283 (49423) 1334 (49430) 1384 (49581) 1434 (49543) 1484 (49620) 1534 (49653) 1284 (49424) 1335 (49487) 1385 (49351) 1435 (49602) 1485 (49563) 1535 (49654) 1285 (49394) 1336 (49341) 1386 (49352) 1436 (49557) 1486 (49564) 1536 (49655) 1286 (49395) 1337 (49342) 1387 (49353) 1437 (49663) 1487 (49707) 1537 (49511) 1287 (49386) 1338 (49532) 1388 (49451) 1438 (49659) 1488 (49463) 1538 (49626) 1288 (49387) 1339 (49343) 1389 (49452) 1439 (49476) 1489 (49703) 1539 (49822) 1289 (49324) 1340 (49525) 1390 (49453) 1440 (49570) 1490 (49704) 1540 (49823) 1290 (49325) 1341 (49533) 1391 (49454) 1441 (49477) 1491 (49705) 1541 (49587) 1291 (49443) 1342 (49526) 1392 (49455) 1442 (49603) 1492 (49711) 1542 (49709) 1292 (49501) 1343 (49399) 1393 (49456) 1443 (49544) 1493 (49669) 1543 (49615) 1293 (49478) 1344 (49534) 1394 (49418) 1444 (49545) 1494 (49672) 1544 (49549) 1294 (49358) 1345 (49437) 1395 (49540) 1445 (49660) 1495 (49621) 1545 (49656) 1295 (49326) 1346 (49503) 1396 (49529) 1446 (49434) 1496 (49565) 1546 (49675) 1296 (49327) 1347 (49535) 1397 (49530) 1447 (49546) 1497 (49566) 1547 (49710) 1297 (49479) 1348 (49536) 1398 (49457) 1448 (49591) 1498 (49622) 1548 (49512) 1298 (49480) 1349 (49359) 1399 (49426) 1449 (49508) 1499 (49623) 1549 (49724) 1299 (49283) 1350 (49488) 1400 (49506) 1450 (49553) 1500 (49712) 1550 (49676) 1300 (49502) 1351 (49489) 1401 (49427) 1451 (49558) 1501 (49605) 1551 (49677) 1301 (49328) 1352 (49490) 1402 (49555) 1452 (49661) 1502 (49624) 1552 (49725) 1302 (49329) 1353 (49438) 1403 (49419) 1453 (49670) 1503 (49625) 1553 (49728) 1303 (49436) 1354 (49449) 1404 (49403) 1454 (49577) 1504 (49435) 1554 (49824) 1304 (49440) 1355 (49537) 1405 (49569) 1455 (49578) 1505 (49592) 1555 (49678) 1305 (49396) 1356 (49400) 1406 (49458) 1456 (49604) 1506 (49593) 1556 (49614) 1306 (49331) 1357 (49401) 1407 (49459) 1457 (49585) 1507 (49594) 1557 (49679) 1307 (49332) 1358 (49442) 1408 (49460) 1458 (49571) 1508 (49673) 1558 (49680) 1308 (49481) 1359 (49461) 1409 (49468) 1459 (49657) 1509 (49595) 1559 (49769)


## April 8/91 Bulletin 28-53 Revision 1 April 16/92 Page7FUS (FSN) FUS (FSN) £US (FSN) FUS (FSN) FUS (FSN) fUS (FSN) 

### (49977) 

### (49522) (49832) 

### (53050) (49610) (49833) (49896) (49897) (49898) (49978) (49979) (49980) (49796) (49834) (49926) (49927) (49835) (53051) 

### (49969) (49930) (49836) (49899) (49915) (49523) (49981) 

### (49982) (49466) (49855) (49916) (49837) (53052) 

### (49928) (49838) (49907) (49917) (53012) 

### (49970) (53013) (49839) (53014) (49929) (49467) (49918) (49919) (49840) (49524) (49983) 1748 1749 1750 1751 1752 

### 1753 1754 1755 1756 1757 1758 1759 1760 1761 

### 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 

### 1773 1774 1775 1776 1777 1778 1779 1780 1781 

### 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 

### 1792 1793 1794 1795 

### (49984) (49908) (49920) (49841) (49921) (49922) (49931) (49971) (49932) (49972) (49923) (49924) (49987) (49889) (49973) (49842) (49934) (49900) (49901) (49905) (49988) (49989) (49990) (49843) (49935) (49974) (49975) (53044) (53045) (49936) (53018) 

### (49991) (49992) (49993) (53019) (49937) (49938) (49906) (49939) (49940) (53020) (49994) (49995) (49996) (49941) (53046) (53115) 1796 (53116) 1797 (53017)



## Bulletin 28-53 Aprl 8/91 Revision 1 April 16/92 156 1561 1562 1563 

### 1564 1565 1566 1567 

### 1568 1569 1570 1571 

### 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 

### 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 

### 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 

### 1602 1603 1604 1605 1606 0 (49681) 1 (49708) 2 (49682) 3 (49683) 4 (49684) 

### (49730) (49731) (49732) (49513) (49606) (49719) (49720) (49608) (49845) (49721) (49722) (49723) (49825) (49826) (49844) (49627) (49846) (49628) (49629) (49550) (49847) (49551) 

### (49767) (49810) (49514) (49811) (49630) (49848) (49812) (49877) (49768) (49631) 

### (49552) (49820) (49813) (49794) (49854) (49814) (49632) (49465) (49815) (49759) 1607 1608 

### 1609 1610 1611 

### 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 

### 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 

### 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 

### 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 

### 1652 1653 7 (49733) 

### 8 (49816) 9 (49515) 0 (49726) (49618) 2 (49817) 3(49818) (49706) 

### (49821)' (49925) (49641) (49740) (49734) (49760) (49727) (49516) (49761) (49762) (49909) 

### (49763) (49784) (49785) (49819) (49741) (49786) (49764) (49517) (49777) (49735) (49787) (49788) (49910) (49795) 

### (49736) (49737) 

### (49789) (49790) (49791) (49765) 

### (49778) (49518) (49738) (49739) (49797) (49798) (49799) (49911) 1654 1655 1656 1657 

### 1658 1659 1660 1661 1662 1663 

### 1664 1665 1666 1667 1668 1669 1670 1671 

### 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 

### 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 

### 1692 1693 1694 1695 1696 1697 1698 1699 1700 

### (49827) (49792) 

### (49793) (49766) (49519) (49912) (49800) (49801) 

### (49802) (49803) (49878) (49913) (49879) (49828) 

### (49968) (49804) (49779) 

### (49520) (49805) 

### (49806) (49780) (49856) (49880) (49881) 

### (49829) (49882) 

### (49904) (49413) (49414) (49883) (49830) (49884) (49890) (49857) (49831) (49885) (49521) (49886) (49888) 

### (49914) (49891) 

### (49892) (49893) (49894) (49895) (49887) (49976) 1701 1702 1703 

### 1704 1705 1706 1707 1708 1709 1710 1711 

### 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 

### 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 

### 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 

### 1742 1743 1744 1745 1746 1747 1799 1800 1801 

### 1802 1803 1804 1805 1806 1808 1809 1810 1811 

### 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 

### 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 

### 1832 1833 1834 1835 1836 1837 1862 1865 1867 1871 

### 1874 1877 1879 (49942) (49998) 

### (53021) (53025) (49999) (53026) 

### (53027) (53053) (53161) (53022) (53172) 

### (53173) (53000) 

### (53028) 

### (53029) (53001) 

### (53030) (53149) (53015) 

### (53031) (53032) (53023) (53033) (53214) (53215) (53024) (53034) (49612) (53083) (49807) (53084) (53150) (53241) 

### (53242) (53243) (53002) (49808) (49933) (53207) (53208) (53209) (53210) (53211) (53212) (53213)

Page 8The low fuelpressureindication systemmodification willbe incorporatedprior to delivery on all applicableDC-9-81, -82, -83, -87, andMD-88 aircraft,manufacturer's fuselage numbers 1326, 1772, 1798, 1807, 1838 through 1861, 1863, 1864, 1866, 1868 through 1870, 1872, 1873, 1875, 1876, 1878, 1880, and subsequent.
(2) SparesAffected:

None.

B. Reason:

One operator reportedone instance where 11,000pounds of fuel remained trapped in the centerwing fuel tankwith 800 pounds of fuel remaining in each main tank. The excess fuel in the center wing fuel tank has been attributed to failure of a boost pump. Failure of a center tank boost pump can result inpremature use of main tank fuel. Incorporation of a low fuel pressureindication systemwhich utilizespressure switches and an annunciator caution lightwillprovide timely indication of a failedboostpump condition.

C. Description:

All Groups
This modification accomplishes the following:

(1) Installs two low fuel pressure switches and associated tube assemblieson center wing fuel tankboost pumps locatedbetween stationsXcw=-58.688 andXcw=-104.500.
(2) Installs a relaybracket, bus assembly, relay, and receptacle in the electricalpower center (EPC)at stationY=160.000.
(3) Modifies annunciator panel.
(4) Revises aircraftwiring to accommodate low fuel pressure system.

D. Compliance:

It is recommended that this modification be accomplished at the earliest practicalmaintenanceperiod.

E. Approval:
The resultantmodificationdescribedin paragraph 1.C hasbeen shown to comply with the applicable Federal Aviation Regulations and is FAA approved for the affected aircraft listed inparagraph 1.A.

April 8/91 Bulletin 28-53
Revision 1 April 16/92 Page 9F. Manpower:
NQIE: Man-hours are estimatedbased on work to be performed by skilled personnel on aircraft/unitwhich has been placed in a maintenance status. Theman-hour/elapsed time estimates do not include:

1. Preparation for the modification: Examples; defueling, purging, placing work stands,opening standard access doors, obtaining tools, and jacking when not essential to themodification.

2. Nonproductive elapsed time: Examples; sealant or adhesive cure time, cleaning,paintdrying time, lunch and/or rest periods, and quality assurance inspections.

3. Administrative functions: Examples;planning, engineering liaison,parts requisition, shift change coordination, and reportwriting.
Operators should take the above into consideration when scheduling thismodification.
Man-hours do not include time forwire routing on aircraft equipped with forward auxiliary tank.
Thismodification may be accomplished in the following approximate man-hours or elapsed hours per aircraft:

Man-Hours Work Phases All Grouns
Gain Access 77.2 Remove 1.0 Modify (Aircraft) 121.5 Install 4.1 Functional Check 2.8 Close up 88.7
Total Man-Hours 295.3
Total ElapsedHours 49.2

G. Material

- Cost and Availabilitv:

(1) Aircraft: Parts/kits required to accomplish thismodification are listed in paragraph 3.A and are to be procured as indicated. Parts bearing Douglas Aircraft Company part numbers are proprietary parts and must be procured under the spareparts article of the purchase agreement, unless methods of manufacture are shown.



## Bulletin 28-53 April 8/91 Revision 1 April 16/92 Page 10Publishedkits and unitnet prices apply to all orders received prior to expirationdate of December 31, 1992. (See paragraph 3.A for unit net prices.)
Publishedprices are firm for all purchase orders in any quantity receivedprior to the expirationdate and are predicated on orders being accumulated and released on thisdate. Availability of parts/kitswill be furnishedupon receipt of purchase order.
Purchase orders received subsequent to the expirationdatewill be individually scheduled andmay reflect an increase in price.
Purchase ordermust specify this Service Bulletinnumber and only parts listedherein. Direct purchaseorder to:

(2) Snares:

Not applicable.

H. Toolina

- Price andAvailability:

None.

I. Weight and Balance:

MD-81. -82. and -83:MD-88
This modificationwill increase the weight of the approximately station 850.0 as follows:
(1) Mfr's EmptyWeight (MEW) Increase
(2) Moment Change (MEW) +8,
(3) IndexUnit Change (MEW)
MD-87
Thismodificationwill increase theweight of the approximately station 736.0 as follows:
(1) Mfr's EmptyWeight (MEW) Increase
(2) Moment Change (MEH) +7,
(3) IndexUnit Change (MEW) 

## aircraft at

+10.0

,500.0

-0.7 LB 

### IN.-LB



## aircraft at

+10.0

,360.0



## -0.7 LB 

### IN.-LB

April 8/91
Revision 1 April 16/92 Bulletin 28-53

Page 11J. References:
(1) MD-80 Service Bulletins 28-54, 28-58, 28-59, and 30-64 should be considered by the operator whenplanning thismodification due to the proximity of work areas and the duplication of parts required by all servicebulletins.
(2) Teledyne Service Bulletin SBR6357.501A-13-01.
(3) Smith Service Bulletin 102ADP-31-220.
(4) Data used inpreparation of this Service Bulletin:

Data Identification

DMS 1984 DPS 1.834-25,dated

October 6, 1988 DPS 2.50, dated

June 22, 1989 DPS 3.317, dated

February 9, 1984 DPS 4.025, dated

May 19, 1987 MM Chapters 6, 20,

25, 28, and 31 SM09570003 SM09570003 SR09280010 SR09280014 SR09280022 SR09280026 SR09280029 SR09280033 SRM Chapter 51 WDM Chapter 20 28-42-11 33-12-01 Chance

D

AC

N

P

E G and H D H A C C A Tvpe of Data Douglas Material Specification Douglas Process Standard
Douglas Process Standard
Douglas Process Standard
Douglas Process Standard
Maintenance Manual
ServiceModification Drawing Advance E.O. Service Rework Drawing Service Rework Drawing Service Rework Drawing Service Rework Drawing Advance E.O. Service Rework Drawing Structural Repair Manual Wiring Diagram Manual Wiring Diagram Wiring Diagram
*Page numbers will varywith operators.
(5) Data supplied in supportof this Service Bulletin:

Data Identification

SM09570003 SM09570003 SR09280010 SR09280014 SR09280022 SR09280026 SR09280029 SR09280033 E G and H D H A C C A 

### Type of Data

Service Advance Service Service Service Service Advance Service Modification Drawing E.O. Rework Drawing Rework Drawing Rework Drawing Rework Drawing E.O. Rework Drawing


## Bulletin 28-53 April 8/91 Revision 1 April 16/92 Page 12QNOE: One reproducibleand two copies or aperture cards of the listed service rework drawing are being furnished to each affected operator.

K. PublicationsAffected:
Themodification outlined in this Service Bulletin affects the followingMD-80 publications:
Publication Airplane FlightManual Flight Crew OperatingManual

Illustrated Parts Catalog MaintenanceManual Weight and BalanceDocuments Chapter/Section

Section III SystemsDescription

Volume II, Section 4 Chapters 1, 6, 7, and 10 31-10 and 33-11 28-21

L. Electrical Load Data:

Not affected.

M. SoftwareAccomplishment Summary:

Not affected.

April 8/91 Revision 1 April 16/92 Bulletin 28-53 Page 13

### 2. Accomplishment Instructions:
WARNING: TO AVOID INJURY TO MAINTENANCE PERSONNEL OR DAMAGE TO EQUIPMENT, MAKE CERTAIN ADEQUATE PRECAUTIONS ARE TAKEN WHILE PERFORMING ANY WORK IF ELECTRICAL POWER IS APPLIED TO THE AIRCRAFT.

CAUTION: ELECTRICALLY GROUNDTHEAIRCRAFT.

GENERAL NOTES; 

### 1. See Figure 1for Scopeof Modification. 

## 2. Maintenancepersonnel shouldthoroughly familiarize themselves withreferenced drawings and manual chapters before starting this 

## modification.
3. For approved fastener andprocess material substitutions, see 

## DC-9 Structural RepairManual,chapter 51-60-0, paragraphs 

## entitled "Interchangeability ofFastener"and"Interchangeabillty ofMaterial." 4. If thelengthofafastener specified in this ServiceBulletin doesnotmeetthe acceptable installation standard, afastener of the sametype or anapprovedsubstitution oneincrement longer or shorter inlength maybe used.

5. A 1/8-inch thick 

## ServiceBulletin fastener heador
EXCEPTION: 

## stack ofthe sametypewasherscalled for inthis is the maximum thickness which maybe used under 

## nuttocounteractaccumulationoftolerances. When theavailable fastener length increment isgreater than 1/16inch, a3/16-inch thick stack ofthe same type washers maybeused. 

## 6. Ifsubstitutions are usedother than those listed inDouglas 

## approvedpublications, operatormustobtain FAA orother applicable regulatory agencyapproval fromlocal authorized agency. 7. Forholepreparation andrivet/hi-lok installation, see Structural Repair Manual, chapter 51-00-0. 

## 8. Identify addedelectrical componentswith applicable itemnumbers as noted inservice reworkdrawing SR09280010.

April 8/91 

## Bulletin 28-53 Revision 1 April 16/92 Page 149. Insulationblanketsmay be pulledback as required to gain access to work areas. Exercise care to avoiddamage to insulation blankets. Ifblankets are damaged, theymust be repaired using DMS 1984, Type 3, Class 2 tape.
10. New wiring must be routed in existingwire runswith compatible systems to avoid systems interference. Where no compatible wire runs exist,develop newwire run.
11. Length specifiedon "ADD"wires is cut length only. Finished length to be determined upon installation of wire into parent wire assembly.

12. Use tying tape to string tie added wires to existingwire bundle approximately 1.5 inches from edge of clamp and approximately 3.0 inchesbetween clamps.

13. Sequence of instructions for removals, installations, and modifications are intended as an aid. Actual sequence of operation to accomplish this modification is at the operator's option.
14. Refer to the followingMD-80 Wiring DiagramManual chapters for applicable operations:
Chapter Tltle
20-10-00 Wiring Procedures 20-20-00 Terminations 20-20-02 Electrical Load Distribution 20-32-00 Connections

15. For installation of fluid fittings, seeMD-80 Maintenance Manual, chapter 28-20-19, paragraph entitled "Removal/Installation Flexible Fuel Line Couplings."
16. Chapters within parentheses refer to sections of the Maintenance Manual.

All Groups

A. Drain and purge leftmain, rightmain, and centermain fuel tanks. (See chapter 28-00-00,paragraph entitled "General

- Description and Operation", and chapter 28-10-01, paragraph entitled "Fuel Tank Maintenance Practices."

Bulletin 28-53 April 8/91 Page 15 Revision 1 April 16/92B. Gain access towork areas as follows:
(1) Open the followingwing access doors. (See chapter 6-21-00.)
RiahtWina

lower Surface Unner Surface

1231C 1436C 1266C 2302C 1263C
(2) Remove and retain2216C right side fuselage underwing filletand attachingparts. (See chapter 6-22-00.)
(3) Open electrical/electronics (E/E) compartment access door (4501A), and the lower forward andmid cargodoors. (See chapter 6-24-00.)
(4) Remove and retain forward cabin attendant's seat and attaching parts as applicable. (See chapter25-23-01, paragraph entitled "Removal/InstallationForward CabinAttendant's Seat.")
(5) Remove and retain aft electricalpower center (EPC)panels 4601A and 4603A, and attachingparts. (See chapter 6-31-00.)
(6) Open forward overhead switchpanel. (See chapter 31-10-07, paragraph entitled "Descriptionand Operation

- Forward Overhead Switch Panel.")
(7) Remove and retain right side flight compartment liners and attachingparts. Open necessaryblanket sections to affected
area. Retain attachingparts. (See chapter 25-11-00, paragraph entitled "Removal/InstallationFlightCompartment Lining and Insulation.")
(8) Accomplish the followingbetween fuselage stationsY=465.000 to Y=617.000 (MD-81,-82, -83, and -88), or Y=377.500 toY=514.000 (MD-87) for aircraftwith forward auxiliary fuel tank installed.
(a) Remove and retain left sidepassenger seats and attaching parts. (See chapter 25-23-00,paragraph entitled "Removal/InstallationPassengerSeats.")
(b) Remove and retain passenger compartment floor covering and attachingparts. (See chapter 25-27-00, paragraph entitled "Passenger Compartment FloorCovering.")
(c) Remove and retain two 9936585-3passenger compartment floor panels and attachingparts. (See chapter 53-20-01, paragraph entitled "Center Section Passenger Compartment Floor Panels Removal/Installation.")

April 8/91 Bulletin 28-53

Revision 1 April 16/92 Page 16(9) Remove and retain cargo compartment sidewall and ceiling panel assemblies and attachingparts as necessary to accomplish modification per service reworkdrawing SR09280014. (See chapter 25-52-01, paragraph entitled "Removal/Installation Sidewall, Ceiling, and Floor Panels.")

C. Modify structure on rightwing forward sparper servicemodification drawing SM09570003, -7003 configuration as follows:
(1) Remove and retainAAP8004-665bracket and attachingparts. Discard fasteners. (2) Temporarily position SM09570003-11 and -13 doublers on 9930529 and 9930514-3webs respectively, as shown on View C-C.
(3) Layout and drill allholes through SM09570003-11 and -13 doublers, and 9930529 and 9930514-3webs, as shown on View C-C.
(4) Remove SM09570003-11 and -13 doublers and install NAS1473-C4 plate
nuts on 9930529 web and SM09570003-5 doubler, as shown on Views A-A, B-B, and C-C. (5) Install SM09570003-11 and -13 doublers on 9930529 and 9930514-3 webs respectively, as shown on View C-C. (6) Reinstall AAP8004-665 bracket.

D. Remove tube assemblies,valves, volute assembly,pump unit, and attaching partsper service reworkdrawing SR09280026, sheets 7.0 and 7.1. Retain parts as indicated on drawing.

E. Install two 42D131-1 pressure switches, two 275CV2 check valves, new tube assemblies and parts retained in stepD per service rework drawing SR09280026, sheets 9.0 through 9.6.

F. Modify EPC circuit breaker panel per service rework

as follows: 

## Install Qtv ev Word Remove drawing SR09280014

Drawing Applicable

Sheet Group

S4916953-2 S4916953-3 S4916953-19 5D0001-1

9961089-530 SR09280014-3 SR09280014-5 *7961078-549

TD-1989-2202 BusAssy BusAssy BusAssy Circuit

Breaker
Nameplate 

## Namestrip Namestrip Bracket S4916953-2 S4916953-20 BS51338K2215

(Plug)

7953823-582 7953823-607

Relay

*This bracket will not be required

has been accomplished. Either bul this bracket. 30.1 30.4 30.4 30.0 30.2 30.3 30.0 30.2 30.3 29.0 29.1 29.0 1 thru 8 10 10 1 thru 8 9 10 1 thru 8 9 10 1 thru 10

1 thru 10 

## if ServiceBulletin 30-64or 28-54 letin requirestheinstallation of

Bulletin 28-53 April 8/91 Revision 1 April 16/92 Page 17G. For aircraftwith Teledyne annunciator panel, replace blank legendplate with "CENTER FUEL PRESS LO"R1133-175-02190 legendplate as shown on service rework drawing SR09280022, sheets 3.1, 6.1, and 6.2, as applicable.

H. For aircraftwith Smith Industries solid state annunciatorpanel, modify and reidentifypanel per Smith Service Bulletin 102ADP-31-220.

NOTE: This step will not be required if Service Bulletin 30-64 or 28-54 has been accomplished. Eitherbulletin requires themodificationof the
same annunciator panel.

I. Modify and reidentifymaster warning and caution controllerper Teledyne Service Bulletin SBR6357.501A-13-01.

NOTE: This step will not be required if Service Bulletin 30-64 or 28-54 has been accomplished. Eitherbulletin requires themodification of the same masterwarning and caution controller.

J. Revise existing wiring and Install low fuel level indication system wiring per applicable group/configuration as follows: Perform continuity checkduring installation. 

### NOTE:Maintenance personnel should familiarize themselveswith sheets 1 through 5 of service reworkdrawing SR09280010prior to accomplishing this step. Configuration Reference Drawing SR09280010

1 2 3 4 5, 9, and 10

6 and 7 8 -7001 -7003 -7005 -7007 

### -7009 -7011 -7013 Sheets Sheets Sheets 

## Sheets Sheets Sheets Sheets 6 through 8, 6, 7, 9, 14, 6, 7, 9, 13, 6, 7, 10. 14, 6, 7, 10, 13, 6, 7, 11, 13, 6, 7, 12, 13, 13, 15, 15,

15, 15, 15, 15, 15, 16, and 23 17, and 23 18, and 23

19, and 23 20, and 23 21, and 23 

### 22 and23

K. Install the following partsper service rework drawing SR09280010:
Part No. Item No. Key Word 

### CL1-1006-161 DC62E1OSL3SN 1 R5-600 2 P1-318 P1-319 

### Receptacle Plug

April 8/91
Revision 1 April 16/92 Bulletin 28-53 Page 18and clip wiring per applicable group as follows:
Maintenance personnel should familiarize themselves with sheets 1 through 5.2 of service reworkdrawing SR09280014prior to accomplishing this step. Configuration

-7001
-7003

-7005

-7007

-7009

-7011

-7013

-7015

-7017 ReferenceDrawina SR09280010

Sheets 6, 6.1, 10 through 13, 16, through 25,

26, 27, and 28 Sheets 6, 7, 10 through 12, 14, 16 through

25.1, 26.1, 27.1 and 28. Sheets 6, 7, 10 through 12, 14 through 25,

26, 27, and 28. Sheets 6, 8, 10 through 12, 15 through 25.1,

26.1, 27.1, and 28. Sheets 6, 8, 10 through 12, 15 through 25,

26, 27, and 28. Sheets 6, 9 through 12, 15 through 25, 26,

27, and 28. Sheets 6, 8, 10 through 12, 15 through 25,

26, 27, and 28. Sheets 6, 8, 10 through 12, 15 through 25, 26, 27, and 28. Sheets 6, 8, 10 through 12, 15 through 25, 26, 27, and 28.

M. Replace the following lightplates on forward overhead switch panel per service reworkdrawing SR09280033, sheet 6 as applicable.

Install Otv Kev Word Remove
9934503-578 Lightplate 9934503-2 or or 9934503-580 Lightplate 9934503-502
or or 9934503-579 Lightplate 9934503-524
or or 9934503-581 Lightplate 9934503-539
or or 9934503-618 Lightplate 9934503-549

NOTE: This step not required if Service Bulletin 28-54, or 30-64 has been accomplished. Either bulletin requires the installation of the same applicable lightplates.

Bulletin 28-53

Page 19 April 8/91 

### Revision 1 April 16/92 L. Route

NOTE:



### Group

1

2

3

4

5 and 6

7

8

9
10N. Perform fuel tank leak check per SR09280029, sheets 11.0 through 11.2.

NOTE: Maintenance personnel should familiarize themselveswith sheets 1 through 4.2 of service reworkdrawing SR09280029 prior to accomplishing this step.
0. Perform functional check per SR09280029, sheets 7.0 through 7.3.

P. Reinstall cargo compartment sidewall, and ceilingpanel assemblies and attachingparts.
Q. Reinstallblankets and flight compartment liners and panels and attachingparts.

R. Close forward overhead switchpanel.

S. Reinstall EPC panels and attaching parts.

T. Reinstall forward cabin attendant's seat and attaching parts.

U. Reinstallpassenger seats,passenger compartment floorpanels, and floor coveringusing retained attachingparts as applicable.

V. Close E/E compartment access door, forward andmid cargo doors.

W. Reinstallunderwing fuselage fillet and attaching parts.

X. Check fuel tank for contamination. (See chapter 28-10-01, paragraph entitled "Inspection/Check for ForeignMaterial.")

Y. Reinstallwing accessdoor panels and attachingparts.

Z. Service left and right wing fuel tanks.

AA. Change existingwiring diagrams to reflect this modification.

April 8/91 Bulletin 28-53 Revision 1 April 16/92 Page 20FIGURE 1 Bulletin 28-53 FIGURE1
Page 21 

## April 8/91 Revision 1 April 16/923. Material Information:

A. The basis for the followina material data is per aircraft.
(1) Parts furnished in servicekit or procured as indicated. Discard old parts.

NOTE: Partsnumbers in parentheses indicate equivalentpart numbers.

Qty PerGroup 1 2 3 4 5 6 7 8 Unit Net 9 10 Price Key Word 

## InstructionsDisDosition

SB09280053-3 SB09280053-5 SB09280053-7 SB09280053-9 SB09280053-11 SB09280053-13 $9,885.00 915.00 872.00 1,396.00 998.00 1,634.00 Service Kit Service Kit Service Kit Service kit FastenerKit Wire Package

1/ SB09280053-3 servicekit consists of the followingparts:

New Part No. Oty Unit Net 

## Price Key Word Old Part No. 

## InstructionsDisposition

AA18100D4-060
AA1810D6-060

AN924-4D AN924-6D CL1-1006-161 DC65-16SS DC62E10SL3SN LRM22M-1 LRC22M-1 MS24389D4 MS24392D4 MS24392D6 MS24393D4 MS24393D6 MS24399D7 MS25281-F4 MS25281-F6 MS29512-04 MS29512-06 MS29512-08 MS29513-006 Orifice Fitting Orifice

Fitting Nut Nut Receptacle Socket Plug Socket Socket Tee Union Union Union Union Reducer Clamp Clamp Packing Packing Packing Packing 216531

M83248/1-904

April 8/91 Bulletin 28-53

Revision 1 April 16/92 PartNo. 

## 1/ 21 

## 4/ 5/ 5/



## 7/17/

10 15/ 10/ 

### 2/ 2/ 8/ 

### 8/ 2/ 

### 9/ 9/



### 1l 

## a/ a1

A/ 

## a/ 8/ 8/ 

### 8/ 8/ 8

Page 22New Part No. Unit Net 

### Otv Pr ce Kev Word Old Part No. 

## InstructionsDispostion

SM09570003-11 SM09570003-13 S00023-20P 

### S00023-20S S4892944-222 S4892944-226 YHMM22-2DB8 

### 011157-015-24 011157-015-32 031-1046-002 275CV2 

### 3937280-503 3937280-505 42D131-1 5D0086-3

(YAE22-G15GN) 

### 5D0086-2

(YAE22-G13GN) 

### 5954663-523 5954663-525 5954663-527 7913199-622 7913199-623 7913199-624 7913199-625 7913199-626 

### 7913199-627 7913199-628 7913199-629 7913199-630 

## 900065-3-08-08

(TA4076F0808) 

### 9D0065-3-08-12 $ 54.60 Doubler 41.20 Doubler Pin Socket Packing Packing Pin Gask-O-Seal Gask-O-Seal Connector Check Valve 1,099.00 Tube Assy 1,211.00 TubeAssy Switch Terminal

Lug Terminal

Lug 226.00 Support 218.00 Support 184.00 Support 264.00 PipeAssy 393.00 PipeAssy 282.00 PipeAssy 457.00 PipeAssy 342.00 PipeAssy 330.00 PipeAssy 456.00 PipeAssy 456.00 PipeAssy 457.00 PipeAssy Bracket

Bracket 3937280-1 

### 713199-531

2/ SB09280053-5 service kit consists of the followingparts:

New Part No. 

## Unit Net 

## Qtv Price Kev Word Qld Part No. Instructions

### Dispositon

S4916953-2 TD-1989-2202 5D0001-1 

### 9961089-530 1 1 1 

### $48.40

1 28.90 BusAssy Relay Circuit

Breaker Nameplate BS51338K2215



### Bulletin 28-53 

## April 8/91 Revision 1 April 16/92 7/ LI 

### 7/ 7 11 

### 2/ 2/ 

# 1 7/ 7/ 7/ 

### Z/ 7/ 

### 9/ 1a/ 

### 15/ 15/ 141



## 14/ 9/ 

## 7/ 9/
Z/ 

### 7/ Z/ Z/ 

# 1/
Z1 1Z 

### 7/ 21 

### 7/ 

## 1/ 7/ 

### Z/ 1U/ 

### 7/



## 1/ 7/ 7/ 

## 12/

7/

Page 233/ SB09280053-7 servicekit consistsof the followingparts:

New Part No. 

### Otv 

## Unit Net 

## Price Key Word Old PartNo. InstructionsDisoosition

SR09280014-3 TD-1989-2202 500001-1 

### I 1 1 

### $34.70 Namestrip Relay Circuit



## Breaker 7953823-582
BS51338K2215

4/ SB09280053-9 servicekit consistsof the followingparts:

New Part No. 

### Otv Unit Net Price Key Word 

### Old Part No. 

## InstructionsDispositon SR09280014-5 

### S4916953-19 S4916953-3 TD-1989-2202 5D0001-1 1 1 1 1 1 

### $34.70 387.00 137.00 Namestrip BusAssy BusAssy Relay Circuit



## Breaker 7953823-607 S491653-20 S491653-2
BS51338K2215

5/ Parts furnished in SB09280053-11 fastenerkit.
NOTE: At operator's option, fastener kit may be purchased from DouglasAircraft Company or procured from operator's stock
or source indicated.
InstructionsPart No. Otv Disposition

HLT436-6-11 Pin HLT436-6-4 Pin HLT436-6-6 Pin 

### HLT436-8-9Pin HLT436-8-10Pin MS20470AD4-4Rivet 

### MS20470AD5-5 Rivet MS20470AD5-7 Rivet MS20470AD5-8 Rivet MS21042L3 Nut 

### MS21042L4Nut NAS1096-3-12 Screw NAS1096-3-9 Screw NAS1252-10L Washer NAS1252-1016L Washer NAS1252-416L Washer NAS1252-816L Washer 

### 24/ 24/ 24/ 

### 24/ 24/

April 8/91 Bulletin 28-53
Revision 1 April 16/92 

### 7/ 

## 12/

7/

7/ 

# 1/ 11 12/ 

## 7/

Page 24InstructionsPartNo. Qtv Disposition

NAS1303-2 Bolt 8 NAS1304-8 Bolt 16 NAS1473C4 PlateNut 16 S2931983-30A06 Washer 111 / S2931983-40A06 Washer 6 7/ 3D0010-6-4 Pin 79 7/ 3D0039-20 Cllpnut 8 7/
6/ SB09280053-13 wire package consists of the followingwires:

NOTE: The wire package contains allwires required by service reworkdrawing SR09280010. Wires identifiedwith
an asterisk (*)may not be required by all of the above groups. Disposition of excess wires is at operator's option.
Length InstructionsWire No. (Inches) Disposition
Q252D24 145 7/ 19/ Q252E24 50 7/ 19/ Q252G24 260 7/ 19/ Q253A24 345 7/ 12/ Q254A24 345 7/ 

### 19/ Q253F22 500 7/ 18/ Q254F22 500 7/ 18/ *Q253E24 600 7/ 19/ *Q254E24 600 7/ 19/

Q253G24 600 7/ 19/ Q254G24 600 7/ 19/ Q255A22N 60 7/ 18/ Q256A22N 60 

### 2/ 18/ Q261A22N 200 7/ 

### 18/ 0262A22N 200 7/ 18/ *Q257A24 325 7/ 19/

Q257B24 70 7/ 19/ Q257C24 325 7/ 19/ *Q257D24 325 7/ 19/ *Q257E24 325 7/ 19/

Q258A24 30 7/ 12/ Q258B24 200 7/ 19/ *Q260A24 200 7/ 19/ *Q260B24 200 7/ 19/ *Q260C24 200 7/ 12/ *Q260D24 200 7/ 19/ *Q260E24 200 7/ 19/

Bulletin 28-53 April 8/91
Revision 1 April 16/92 Page 257/ May be purchased from theDouglasAircraft Company as an end item spare.
f/ May be procured from operator's stock.
9/ May be purchased from:

10/ May bepurchased from: Burndy Corporation 266 BrooksideRoad Waterbury, Connecticut 06708 Holllngsead International,

Incorporated 13701 ExcelsiorDrive Santa Fe Springs,California
11/ May be purchased from:

12/ May be purchased from:

13/ May be purchased from:

14/ May bepurchased from:

15/ May be purchased from:

16/ May bepurchased from:

17/ May be purchased from: ITT Corporation 666 EastDyer Road SantaAna, California 97202
Leach Corporation RelayDivision 5915Avalon Boulevard LosAngeles, California 90003-1309

TA Manufacturing, Incorporated Subsidiary of Criton Technologies 375 WestArdenAvenue Glendale, California 91209-2500

Custom Control Sensors,

Incorporated 21111 Plummer Street Chatsworth, California 91311-4905
Alpha Seal 1166Knollwood Circle Anaheim, California 92801
Teledyne Controls Teledyne Industries,Incorporated 12333West Olympic Boulevard West LosAngeles, California 90064-1021
AllanAircraft Supply Company 11643Vanowen NorthHollywood, California 91609



### April 8/91 71468

35344

84971

09049

OG1W3

98571

19280

Bulletin 28-53
Revision 1 April 16/92 Page 26 CAGE 09922

30528

9067018/ Wire Specification: 22-gage unshielded single conductor tinned copper wire per Douglas Specification BXS7008 (MIL-W-22759/34),or equivalent.

or
Wire Specification: 22-gageunshielded single conductornickel plated copper alloy wire perDouglas Specification BXS7007 (MIL-W-81381/12), or equivalent.
19/ Wire Specification: 24-gage unshielded single conductor nickel plated high-strength copper alloy wire perDouglas Specification BXS7008 (MIL-W-22759/42),or equivalent.

or
Wire Specification: 24-gage unshielded single conductornickel plated high-strength copperwire per Douglas Specification BXS7007 (MIL-W-81381/14), or equivalent.

(2) Part to be purchased as an end item spare. in service kit.

Part No. Oty Unit Net 

## Price Key Word 

## Part not included



## InstructionsDisoosltlon
7961078-549 1 $54.00 Bracket
(3) Part to be procured from operator's stock or sources indicated.

Key Word InstructionsDisposition

R1133-175-02190 1 Legend Plate 

## 16/
(4) Parts to beprocured from source indicated.

New Part No. Otv KeyWord Old Part No. InstructionsDisposition

9934503-578
or 9934503-579
or 9934503-580 or 9934503-581 or 9934503-618 

## Lightplate Lightplate Lightplate Lightplate Lightplate 9934503-2 or 9934503-502
or 9934503-524
or 9934503-539 or 9934503-549

NOTE: Required lightplate is to be determined by the operator.

Bulletin 28-53 April 8/91 

### Revision 1 April 16/92 Part No. 7/

2z/ 

## 20/ 21/

2/ 21/ 

### Otv

Page 2720/ Partnot required if either Service Bulletin 28-54 or 30-64 has been accomplished.

21/ May be purchased from: Bell Industries, Incorporated 18225Northeast 76th Street Redmond,Washington 90851-5021
(5) Part to bemodified and reidentifiedby the operator or noted supplier for aircraft with Smith solid state annunciatorpanel.

New Part No. Otv Key Word 

### Old Part No. InstructionsDisposition
102ADP*_* 1 Annunciator Panel 102ADP*_* 

### z21

22/ To bemodified and reidentifiedby the operator per Smith IndustriesService Bulletin 102ADP-31-220as applicable.

or
Address and return part for rework and reidentification to:
Smith IndustriesAerospace

and Defense Systems, Incorporated 14180Roosevelt Boulevard Clearwater, Florida 34622 35012

(6) Part to bemodified and reidentifiedby the operator or noted supplier.

New Part No. Otv Key Word 

### Old Part No. 

## InstructionsDisposition
7914390-505 1 MasterWarning and Caution 

### 7914390-501

23/ To bemodified and reidentifiedby the operator per Teledyne Industries Service BulletinSBR6357.501A-13-01 as applicable.

or
Address and return to: 

## part for modificationandreidentification

98571



## April 8/91 Bulletin 28-53

Revision 1 April 16/92 CAGE 05617

Page 2824/ May be purchased from: Hi-Shear Corporation 2600 SkyparkDrive Torrance, California 90509 CAGE 73197

(7) Materials to beprocured from operator's stock or sources indicated.

PR-1422 B-2,

Sealant (DMS 2082)

or Equivalent 8 Oz

?5/ May be purchased from: Key Word

Sealant InstructionsDisposition

2z/

Products Research and

Chemical Corporation 5430 San FernandoRoad Glendale, California 91209 83574

B. The basis for the followingmaterial data isper spares.

None.

Any inquiries regarding accuracy, timeliness, completeness, and legibility of this Service Bulletin shouldbe directed to the localDAC FieldRepresentative, or:

RZV LL

Bulletin 28-53 April 8/91 PartNo.



### Revision 1 April 16/92 Page 29