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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-57A1345 RB Original Issue: December 17, 2019 ATA System: 5720 SUBJECT: WINGS - Front Spar - Inspection of Nacelle Support Overwing Fitting at WBL 191 Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 300-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws.
9E991ECCN:
Copyright © 2019 Boeing.
Unpublished Work. All Rights Reserved.
Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company.
Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing.
Original Issue: December 17, 2019 737-57A1345 RB 1 of 29
2.0
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Table of Contents
1. EFFECTIVITY5
A. Airplanes5
B. Spares Affected8
2. CONCURRENT REQUIREMENTS8
3. COMPLIANCE8
4. APPROVAL13
5. ACCOMPLISHMENT INSTRUCTIONS15
A. General Information15
B. Work Instructions16
FIGURE 2: ULTRASONIC INSPECTION OF NACELLE SUPPORT OVERWING FITTING - LEFT . . 22 FIGURE 3: GENERAL VISUAL INSPECTION OF THE STRUT TO WING - DIAGONAL BRACE - LEFT
.24
FIGURE 5: ULTRASONIC INSPECTION OF NACELLE SUPPORT OVERWING FITTING - RIGHT . 26 FIGURE 6: GENERAL VISUAL INSPECTION OF THE STRUT TO WING - DIAGONAL BRACE - RIGHT
.28
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 17, 2019 737-57A1345 RB 4 of 29 REQUIREMENTS BULLETIN 737-57A1345
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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-57A1345 RB Original Issue: December 17, 2019 ATA System: 5720 SUBJECT: WINGS - Front Spar - Inspection of Nacelle Support Overwing Fitting at WBL 191
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER. THIS IS AN ENHANCED REQUIRED FOR COMPLIANCE DOCUMENT. THE BOEING
PROCESSES USED TO CREATE THE SERVICE BULLETIN (SB) AND THE REQUIREMENTS BULLETIN (RB) ENSURE THAT THE INFORMATION BETWEEN "RC START" AND "RC END" IN THE SB ARE IDENTICAL TO THE INFORMATION IN THE SAME SECTIONS (COMPLIANCE, WORK INSTRUCTIONS…) OF THE RB WHICH THE SB REFERS TO AS THE RELATED DOCUMENT.
1. Effectivity A. Airplanes This bulletin is applicable to 737-300, 737-400, 737-500 Airplane(s), line number(s) 1001, 1007, 1015, 1022, 1030, 1037, 1043, 1048, 1052, 1057, 1063, 1069, 1073, 1076, 1080, 1083, 1087, 1090, 1092, 1094, 1096, 1098, 1100-1101, 1103-1104, 1106-1108, 1110-1112, 1114-1116, 1118-1119, 1121-1134, 1136-1142, 1144-1150, 1152-1153, 1156-1164, 1166, 1168-1175, 1177, 1179-1185, 1187-1188, 1190-1193, 1195-1196, 1198, 1200-1202, 1204-1222, 1224-1225, 1227-1235, 1237-1240, 1242-1244, 1246-1255, 1258-1260, 1263-1264, 1268-1298, 1300-1312, 1314-1318, 1320-1328, 1330-1341, 1343-1346, 1348-1360, 1362-1368, 1370, 1372-1378, 1380-1386, 1388-1391, 1393-1396, 1398, 1400, 1402, 1404, 1406-1413, 1416-1417, 1419, 1421, 1423, 1425, 1427-1452, 1454-1455, 1457-1485, 1487-1522, 1524-1529, 1531-1564, 1566-1578, 1580, 1582, 1584, 1586-3132 in 3 Group(s). Where the effectivity is presented with hyphens between line numbers, the airplane applicability means "through" and "inclusive", e.g. line numbers 1-9 means line numbers 1 through 9 inclusive.
DESCRIPTIONCONFIGURATIONGROUP 737-300 airplanes with Titanium, Non Shot Peened, Nacelle Support Overwing Fittings.
-1 737-300/-400/-500 Airplanes with Titanium Shot Peened Nacelle Support Overwing Fittings.
-2 737-300/-400/-500 Airplanes with a Steel Nacelle Support Overwing Fitting or a Titanium Shot Peened Nacelle Support Overwing Fitting.
-3 Airplane Models:
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 17, 2019 737-57A1345 RB 5 of 29
737-300, 737-400, 737-500 GroupVariable Number 2PJ301 - PJ302 2PJ551 - PJ560 3PJ561 2PJ601 - PJ615 3PJ811 2PJ816 - PJ817 2PM381 - PM399 2PM401 - PM417 2PM541 - PM564 1PP001 - PP026 2PP027 - PP054 1PP101 - PP125 2PP126 - PP160 1PP161 - PP168 2PP169 1PP181 - PP182 2PP183 - PP199 1PP201 - PP204 2PP205 1PP221 1PP231 - PP243 1PP281 - PP286 1PP301 - PP305 1PP351 - PP352 2PP353 1PP376 - PP384 2PP391 - PP393 1PP401 - PP420 2PP421 - PP440 1PP471 - PP475 1PP501 - PP504 GroupVariable Number 2PP505 - PP520 1PP521 - PP522 1PP631 - PP634 1PP651 - PP652 1PP671 - PP699 1PP701 - PP718 2PP719 - PP733 1PP771 - PP777 2PP778 - PP779 1PP801 - PP804 2PP805 - PP808 1PP821 - PP827 1PP831 - PP835 2PP836 - PP845 1PP846 - PP847 2PP848 1PP851 2PP852 1PP861 - PP870 2PP871 - PP877 1PP891 - PP898 2PP899 2PP901 - PP930 1PP931 - PP934 2PP935 - PP936 1PP946 - PP947 2PP948 2PP951 - PP952 2PP961 - PP967 2PP981 - PP991 2PP993 GroupVariable Number 1PQ001 - PQ012 2PQ013 - PQ016 1PQ026 - PQ037 2PQ038 - PQ041 1PQ051 - PQ060 2PQ061 - PQ092 1PQ101 - PQ110 2PQ111 - PQ199 2PQ201 - PQ202 2PQ221 - PQ237 2PQ241 - PQ243 2PQ251 - PQ267 2PQ281 - PQ299 2PQ301 - PQ307 2PQ331 - PQ332 2PQ341 - PQ348 2PQ361 - PQ373 2PQ391 - PQ395 2PQ401 - PQ418 2PQ421 2PQ431 - PQ438 2PQ447 - PQ448 3PQ451 2PQ454 2PQ471 - PQ475 2PQ479 - PQ481 2PQ486 - PQ487 2PQ491 - PQ493 2PQ771 - PQ772 2PQ791 - PQ793 2PQ801 - PQ805 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 2PQ931 - PQ935 2PQ951 2PQ971 - PQ974 3PQ975 - PQ976 2PQ977 - PQ997 2PR001 - PR002 3PR003 - PR004 2PR005 - PR017 2PR021 - PR031 3PR032 2PR033 - PR034 3PR041 - PR042 2PR043 - PR045 2PR061 - PR072 2PR077 - PR082 2PR091 - PR092 2PR096 2PR101 2PR121 - PR122 2PR131 - PR132 2PR141 - PR143 2PR161 - PR172 2PR181 2PS601 - PS631 2PS636 - PS638 2PS641 - PS644 2PS651 - PS657 2PS666 - PS669 2PS691 - PS692 2PS701 - PS706 2PS751 - PS799 2PS811 2PS836 - PS837 GroupVariable Number 2PS841 - PS846 2PS851 - PS852 2PS856 2PS861 - PS863 2PS866 - PS868 2PS871 - PS874 2PS896 - PS897 2PS901 - PS941 2PS956 - PS957 2PS961 - PS963 2PS971 - PS978 2PT001 - PT015 2PT021 - PT031 2PT041 - PT064 2PT101 - PT105 2PT121 - PT138 2PT146 - PT148 2PT161 - PT170 2PT181 - PT188 2PT211 - PT220 2PT295 2PT301 - PT309 2PT331 - PT360 2PT381 - PT399 2PT401 - PT438 2PT501 - PT517 2PT561 - PT565 2PT581 - PT586 2PT611 - PT621 2PT641 - PT644 2PT651 - PT656 2PT671 - PT672 2PT681 - PT685 GroupVariable Number 2PT701 - PT703 2PT716 - PT717 2PT721 - PT725 2PT801 - PT834 2PT851 - PT854 2PT871 - PT886 2PT901 - PT930 2PT971 - PT973 2PT981 - PT982 3PT983 2PT984 - PT985 2PT996 2PU001 - PU025 2PU301 2PU311 - PU313 2PV001 - PV055 2PV201 - PV209 2PV226 - PV229 2PV231 - PV237 2PV271 - PV272 2PV281 - PV287 2PV296 2PV301 - PV302 2PV351 2PV356 - PV357 2PW001 - PW054 2PW061 - PW068 2PW072 2PW086 - PW088 2PW091 - PW094 2PW101 - PW102 2PW106 2PW111 - PW120 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 17, 2019 737-57A1345 RB 7 of 29 REQUIREMENTS BULLETIN 737-57A1345
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GroupVariable Number 2PW156 - PW157 2PW161 - PW171 2PW201 - PW252 2PW261 - PW268 2PW271 - PW276 2PW278 2PW281 - PW293 2PW296 2PW301 - PW327 2PW401 - PW408 2PW411 - PW418 GroupVariable Number 2PW421 - PW424 2PW431 - PW435 2PW441 - PW450 2PW461 - PW467 2PW501 - PW504 2PW511 - PW522 2PW524 - PW550 2PW556 - PW557 2PW561 - PW564 2PW571 - PW576 2PW591 - PW596 GroupVariable Number 2PW611 - PW622 2PW631 - PW637 2PW661 - PW662 2PW681 - PW683 2PW701 - PW702 2PW711 - PW717 2PW741 - PW742 2PW761 2PW771 3PW831 2PW851 - PW856 B. Spares Affected None.
2. CONCURRENT REQUIREMENTS None.
3. COMPLIANCE The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to Requirements Bulletin 737-57A1345 RB. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory.
When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION or an OPTION, do all of the ACTION numbers for that CONDITION or OPTION.
Group 1:
Table 1: Ultrasonic Inspection of the Nacelle Support Overwing Fitting - Airplanes with Titanium Non Shot Peened Fitting - Left Repeat Interval (Not to Exceed) Compliance TimeActionCondition -Within 4,500 Flight Cycles after the original issue date of Requirements Bulletin (RB) 737-57A1345 RB.
Do an ultrasonic inspection of the Nacelle Support Overwing Fitting at WBL 191 for any crack.
All Airplanes -Before further flight.Contact The Boeing Company for repair instructions and do the repair.
CONDITION 1: ANY
CRACK FOUND Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 17, 2019 737-57A1345 RB 8 of 29 REQUIREMENTS BULLETIN 737-57A1345
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Group 1:
Table 1: Ultrasonic Inspection of the Nacelle Support Overwing Fitting - Airplanes with Titanium Non Shot Peened Fitting - Left Repeat Interval (Not to Exceed) Compliance TimeActionCondition 4,500 Flight Cycles.
-Repeat ultrasonic inspection of the Nacelle Support Overwing Fitting at WBL 191 for any crack.
(a) CONDITION 2: NO
CRACK FOUND
(a) Replacement with a steel nacelle support overwing fitting is terminating action to the repeat inspection.
Group 1:
Table 2: Ultrasonic Inspection of the Nacelle Support Overwing Fitting - Airplanes with Titanium Non Shot Peened Fitting - Right Repeat Interval (Not to Exceed) Compliance TimeActionCondition -Within 4,500 Flight Cycles after the original issue date of Requirements Bulletin (RB) 737-57A1345 RB.
Do an ultrasonic inspection of the Nacelle Support Overwing Fitting at WBL 191 for any crack.
All Airplanes -Before further flight.Contact The Boeing Company for repair instructions and do the repair.
CONDITION 3: ANY
CRACK FOUND 4,500 Flight Cycles.
-Repeat ultrasonic inspection of the Nacelle Support Overwing Fitting at WBL 191 for any crack.
(a) CONDITION 4: NO
CRACK FOUND
(a) Replacement with a steel nacelle support overwing fitting is terminating action to the repeat inspection.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 17, 2019 737-57A1345 RB 9 of 29 REQUIREMENTS BULLETIN 737-57A1345
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Group 2:
Table 3: Ultrasonic Inspection of the Nacelle Support Overwing Fitting - Airplanes with a Titanium Shot Peened Fitting - Left Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition -Within 4,500 Flight Cycles after the original issue date of Requirements Bulletin (RB) 737-57A1345 RB.
Before 44,000 total Flight Cycles.
Do an ultrasonic inspection of the Nacelle Support Overwing Fitting at WBL 191 for any crack.
All Airplanes -Before further flight.Contact The Boeing Company for repair instructions and do the repair.
CONDITION 5: ANY
CRACK FOUND 4,500 Flight Cycles.
-Repeat ultrasonic inspection of the Nacelle Support Overwing Fitting at WBL 191 for any crack.
(a) CONDITION 6: NO
CRACK FOUND
(a) Replacement with a steel nacelle support overwing fitting is terminating action to the repeat inspection.
Group 2:
Table 4: Ultrasonic Inspection of the Nacelle Support Overwing Fitting - Airplanes with a Titanium Shot Peened Fitting - Right Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition -Within 4,500 Flight Cycles after the original issue date of Requirements Bulletin (RB) 737-57A1345 RB.
Before 44,000 total Flight Cycles.
Do an ultrasonic inspection of the Nacelle Support Overwing Fitting at WBL 191 for any crack.
All Airplanes -Before further flight.Contact The Boeing Company for repair instructions and do the repair.
CONDITION 7: ANY
CRACK FOUND 4,500 Flight Cycles.
-Repeat ultrasonic inspection of the Nacelle Support Overwing Fitting at WBL 191 for any crack.
(a) CONDITION 8: NO
CRACK FOUND Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 17, 2019 737-57A1345 RB 10 of 29 REQUIREMENTS BULLETIN 737-57A1345
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Group 2:
Table 4: Ultrasonic Inspection of the Nacelle Support Overwing Fitting - Airplanes with a Titanium Shot Peened Fitting - Right Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition
(a) Replacement with a steel nacelle support overwing fitting is terminating action to the repeat inspection.
Group 3:
Table 5: Magnetic Check and Ultrasonic Inspection of the Nacelle Support Overwing Fitting - Airplanes with a Steel or a Titanium Shot Peened Nacelle Support Overwing Fitting - Left Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition -Within 4,500 Flight Cycles after the original issue date of Requirements Bulletin (RB) 737-57A1345 RB.
Before 44,000 total Flight Cycles.
Do a magnetic check to determine the material of the Nacelle Support Overwing Fitting at WBL
191.
All Airplanes --No further action is required.
CONDITION 9: NACELLE
SUPPORT OVERWING
FITTING IS STEEL -Before further flight.Do an ultrasonic inspection of the Nacelle Support Overwing Fitting at WBL 191 for any crack.
CONDITION 10: NACELLE
SUPPORT OVERWING
FITTING IS TITANIUM -Before further flight.Contact The Boeing Company for repair instructions and do the repair.
CONDITION 10.1: ANY
CRACK FOUND 4,500 Flight Cycles.
-Repeat ultrasonic inspection of the Nacelle Support Overwing Fitting at WBL 191 for any crack.
(a) CONDITION 10.2: NO
CRACK FOUND
(a) Replacement with a steel nacelle support overwing fitting is terminating action to the repeat inspection.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 17, 2019 737-57A1345 RB 11 of 29 REQUIREMENTS BULLETIN 737-57A1345
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Group 3:
Table 6: Magnetic Check and Ultrasonic Inspection of the Nacelle Support Overwing Fitting - Airplanes with a Steel or a Titanium Shot Peened Nacelle Support Overwing Fitting - Right Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition -Within 4,500 Flight Cycles after the original issue date of Requirements Bulletin (RB) 737-57A1345 RB.
Before 44,000 total Flight Cycles.
Do a magnetic check to determine the material of the Nacelle Support Overwing Fitting at WBL
191.
All Airplanes --No further action is required.
CONDITION 11: NACELLE
SUPPORT OVERWING
FITTING IS STEEL -Before further flight.Do an ultrasonic inspection of the Nacelle Support Overwing Fitting at WBL 191 for any crack.
CONDITION 12: NACELLE
SUPPORT OVERWING
FITTING IS TITANIUM -Before further flight.Contact The Boeing Company for repair instructions and do the repair.
CONDITION 12.1: ANY
CRACK FOUND 4,500 Flight Cycles.
-Repeat ultrasonic inspection of the Nacelle Support Overwing Fitting at WBL 191 for any crack.
(a) CONDITION 12.2: NO
CRACK FOUND
(a) Replacement with a steel nacelle support overwing fitting is terminating action to the repeat inspection.
Table 7: General Visual Inspection of the Strut to Wing - Diagonal Brace - Left Repeat Interval (Not to Exceed) Compliance TimeActionCondition -Within 4,500 Flight Cycles after the original issue date of Requirements Bulletin (RB) 737-57A1345 RB.
Do a general visual inspection of the Strut to Wing Diagonal Brace at nacelle STA 278 for any crack.
All Airplanes -Before further flight.Contact the Boeing Company for repair instructions and do the repair.
CONDITION 13: ANY
CRACK FOUND Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 17, 2019 737-57A1345 RB 12 of 29 REQUIREMENTS BULLETIN 737-57A1345