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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-57A1359 RB Original Issue: October 03, 2025 ATA System: 5741 SUBJECT: WINGS - Wing Leading Edge - Engine Fuel Shutoff Valve Access Panel Inspection and Test EXPORT CONTROLLED - This technology or software is subject to the U.S. Export Administration Regulations (EAR), (15 C.F.R. Parts 730-774). No authorization from the U.S. Department of Commerce is required for export, re-export, in-country transfer, or access EXCEPT to country group E:1 or E:2 countries/persons per Supp.1 to Part 740 of the EAR.
9E991ECCN:
Copyright © 2025 The Boeing Company 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: October 03, 2025 737-57A1359 RB 1 of 42
4.0
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 03, 2025 737-57A1359 RB 2 of 42 REQUIREMENTS BULLETIN 737-57A1359
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Table of Contents
1. EFFECTIVITY5
A. Airplanes5
B. Spares Affected9
2. CONCURRENT REQUIREMENTS9
3. COMPLIANCE9
4. APPROVAL12
5. ACCOMPLISHMENT INSTRUCTIONS13
A. General Information13
B. Work Instructions14
FIGURE 1: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FORM-IN-PLACE (FIP)
GASKET DETAILED INSPECTION (DET)17
FIGURE 2: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FORM-IN-PLACE (FIP)
GASKET DETAILED INSPECTION (DET)20
FIGURE 3: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FORM-IN-PLACE (FIP)
GASKET REPLACEMENT23
FIGURE 4: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FORM-IN-PLACE (FIP)
GASKET REPLACEMENT28
APPENDIX A: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FLUID LEAK TEST . 33 APPENDIX B: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FLUID LEAK TEST. 38 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 03, 2025 737-57A1359 RB 3 of 42 REQUIREMENTS BULLETIN 737-57A1359
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Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 03, 2025 737-57A1359 RB 4 of 42 REQUIREMENTS BULLETIN 737-57A1359
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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-57A1359 RB Original Issue: October 03, 2025 ATA System: 5741 SUBJECT: WINGS - Wing Leading Edge - Engine Fuel Shutoff Valve Access Panel Inspection and Test
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN 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 737-700, 737-700C, 737-800, 737-900ER Airplane(s), line number(s) 1981, 2093, 3834-3878, 3880-3915, 3917-3968, 3970-4013, 4015-4054, 4056-4098, 4100-4140, 4142-4180, 4182-4218, 4220-4255, 4257-4293, 4295-4330, 4332-4365, 4367-4398, 4400-4444, 4446-4480, 4482-4546, 4548-4608, 4610-4672, 4674-4727, 4729-4767, 4769-4812, 4814-4858, 4860-4897, 4899-4937, 4939-4977, 4979-5019, 5021-5057, 5059-5097, 5099-5137, 5139-5177, 5179-5217, 5219-5261, 5263-5297, 5299-5337, 5339-5367, 5369-5397, 5399-5427, 5429-5457, 5459-5477, 5479-5509, 5511-5541, 5543-5566, 5568-5586, 5588-5601, 5603-5622, 5624-5655, 5657-5667, 5669-5679, 5681-5711, 5713-5727, 5729-5739, 5741-5764, 5766-5787, 5789-5795, 5797-5822, 5824-5850, 5853-5879, 5881-5901, 5904-5935, 5937-5947, 5949-5962, 5964-5991, 5994-6019, 6021-6033, 6035-6047, 6049-6073, 6075, 6077-6103, 6105-6113, 6115-6131, 6133-6153, 6155-6159, 6161-6187, 6190-6215, 6217-6221, 6223-6243, 6245-6249, 6251-6271, 6274-6289, 6291-6299, 6301-6307, 6309-6325, 6327, 6329-6343, 6345-6355, 6357-6359, 6361-6371, 6373-6383, 6386-6395, 6397-6407, 6409-6411, 6413-6419, 6421-6429, 6431-6439, 6442-6447, 6449-6455, 6457-6463, 6465-6467, 6469-6471, 6473-6480, 6482-6489, 6491, 6493-6498, 6500-6507, 6509-6514, 6516-6520, 6522-6527, 6529-6531, 6533-6534, 6536-6541, 6543-6547, 6549-6554, 6556-6559, 6561, 6563-6568, 6570-6574, 6576-6581, 6583-6588, 6590-6593, 6596-6597, 6599-6602, 6604-6606, 6608-6611, 6613-6615, 6617-6620, 6622, 6624, 6626-6629, 6631-6633, 6635-6638, 6640-6642, 6644-6647, 6649-6651, 6653-6656, 6659-6660, 6662-6665, 6667-6671, 6673-6676, 6678-6680, 6682-6685, 6688-6689, 6691-6694, 6696-6698, 6700-6703, 6705-6707, 6709-6712, 6714-6716, 6718-6719, 6721, 6723-6725, 6727-6730, 6732-6734, 6736-6739, 6741-6743, 6745-6748, 6751-6752, 6754-6757, 6759-6761, 6763-6766, 6768-6770, 6772-6775, 6777-6779, 6781-6782, 6786-6788, 6790-6791, 6793, 6795, 6797, 6799-6802, 6804, 6806, 6808-6809, 6811, 6813, 6815, 6817-6818, 6820, 6822-6824, 6826-6827, 6829, 6831-6833, 6835-6836, 6838, 6840, 6842, 6844-6845, 6847, 6849, 6851, 6853-6854, 6856-6858, 6860, 6862-6863, 6865, 6867, 6869-6871, 6873-6874, 6878-6880, 6882-6883, 6885, 6887-6889, 6891-6892, 6894, 6896, 6898, 6900-6903, 6905, 6907, 6910, 6912-6914, 6916, Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 03, 2025 737-57A1359 RB 5 of 42
6918-6919, 6921, 6923-6925, 6927-6928, 6930, 6932-6934, 6936-6937, 6939, 6943, 6945-6948, 6950, 6952, 6954-6955, 6957-6959, 6961-6962, 6964, 6966-6967, 6969, 6971-6972, 6977, 6979, 6981-6982, 6984, 6986-6987, 6989, 6992, 6994, 6996-6997, 6999, 7001-7002, 7007, 7009, 7011-7012, 7014, 7016-7017, 7019, 7021-7022, 7024, 7026, 7029, 7031-7032, 7034, 7036-7037, 7039, 7041, 7046-7047, 7049, 7051-7052, 7054, 7056-7057, 7059, 7061, 7063, 7066-7067, 7069, 7071-7072, 7076, 7078, 7081-7082, 7084, 7086-7087, 7089, 7091-7092, 7094, 7097, 7099, 7101-7102, 7104, 7106-7107, 7109, 7112, 7116-7117, 7119, 7121-7122, 7124, 7126-7127, 7129, 7131, 7134, 7136-7137, 7139, 7141-7142, 7146, 7149, 7151-7152, 7154, 7156-7157, 7159, 7161-7162, 7164, 7167, 7169, 7171-7172, 7174, 7176-7177, 7179, 7182, 7187, 7189, 7191, 7194, 7197, 7199, 7202, 7204, 7206, 7209, 7212, 7214, 7217, 7221, 7224, 7227, 7229, 7232, 7234-7235, 7239, 7242, 7244, 7247, 7249, 7251, 7257, 7259, 7262, 7264, 7266, 7269, 7272, 7274, 7277, 7279-7280, 7284, 7287, 7292, 7294, 7297, 7299, 7302, 7304, 7307, 7309, 7312, 7314, 7317, 7319, 7322, 7327, 7329, 7332, 7334, 7337, 7339, 7342, 7344, 7347, 7349, 7352, 7354, 7357, 7362, 7364, 7367, 7369, 7372, 7374, 7377, 7379, 7382, 7387, 7397, 7402, 7407, 7412, 7417, 7422, 7432, 7437, 7442, 7447, 7452, 7457, 7467, 7472, 7477, 7482, 7487, 7492, 7502, 7507, 7512, 7517, 7522, 7527, 7537, 7547, 7552, 7557, 7562, 7572, 7577, 7582, 7587, 7592, 7597, 8592, 9103 in 1 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.
The Variable Numbers and Group Information for the applicable airplanes is given below.
DESCRIPTIONCONFIGURATIONGROUP 737-700, -700C, -800, -900ER Airplanes-1 Airplane Models:
737-700, 737-700C, 737-800, 737-900ER GroupVariable Number 1YB636 1YD418 - YD424 1YF068 - YF080 1YF132 1YF634 - YF685 1YF691 - YF695 1YF871 - YF872 1YG134 - YG149 1YG513 - YG517 1YG721 - YG722 1YH001 - YH002 1YH307 GroupVariable Number 1YH512 - YH542 1YH552 - YH594 1YH603 - YH606 1YH613 - YH620 1YH632 1YH636 - YH637 1YH641 1YH681 - YH686 1YH701 - YH755 1YH801 - YH899 1YH901 - YH908 1YH911 - YH915 GroupVariable Number 1YH951 - YH952 1YK478 1YK493 1YK499 1YK695 - YK699 1YK999 1YL231 - YL237 1YM414 - YM415 1YN126 1YN552 - YN566 1YN581 - YN585 1YN591 - YN593 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 03, 2025 737-57A1359 RB 6 of 42 REQUIREMENTS BULLETIN 737-57A1359
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GroupVariable Number 1YN602 - YN606 1YN651 - YN653 1YN661 - YN663 1YN666 - YN667 1YN671 - YN674 1YN741 - YN746 1YN756 - YN758 1YQ020 - YQ021 1YQ045 1YQ203 - YQ207 1YQ283 - YQ284 1YQ321 - YQ324 1YQ331 - YQ334 1YQ346 - YQ347 1YQ351 - YQ367 1YQ371 1YQ456 1YQ461 1YQ471 1YQ501 - YQ520 1YQ601 - YQ606 1YQ610 - YQ614 1YR014 - YR050 1YR057 - YR098 1YR103 - YR105 1YR117 - YR124 1YR130 - YR140 1YR143 - YR144 1YR173 - YR182 1YR186 - YR198 1YR205 - YR215 1YR246 - YR270 1YR279 - YR285 GroupVariable Number 1YR287 - YR290 1YR312 - YR334 1YR338 - YR341 1YR363 - YR366 1YR371 - YR373 1YR376 - YR377 1YR382 1YR386 - YR388 1YR391 1YR396 - YR399 1YR411 - YR413 1YR416 - YR418 1YR423 - YR424 1YR426 - YR430 1YR432 - YR450 1YR454 - YR455 1YR457 - YR499 1YR504 - YR506 1YR513 - YR515 1YR519 - YR520 1YR527 - YR544 1YR546 - YR551 1YR556 - YR562 1YR571 - YR582 1YR591 - YR592 1YR618 - YR650 1YR653 - YR655 1YR657 - YR658 1YR661 - YR663 1YR671 - YR673 1YR676 - YR678 1YR681 - YR682 1YR714 - YR769 GroupVariable Number 1YR771 - YR799 1YR807 - YR827 1YR831 - YR838 1YR841 - YR850 1YR854 - YR899 1YR901 - YR903 1YR931 - YR934 1YR938 - YR944 1YR952 - YR998 1YS002 1YS006 - YS009 1YS031 - YS032 1YS053 - YS073 1YS101 - YS120 1YS126 - YS142 1YS146 - YS160 1YS166 - YS194 1YS196 - YS197 1YS201 - YS209 1YS221 - YS225 1YS231 - YS236 1YS271 - YS288 1YS295 - YS296 1YS301 - YS348 1YS351 - YS378 1YS381 - YS386 1YS393 - YS395 1YS401 1YS451 1YS456 - YS457 1YS462 - YS465 1YS467 1YS501 - YS502 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 03, 2025 737-57A1359 RB 7 of 42 REQUIREMENTS BULLETIN 737-57A1359
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GroupVariable Number 1YS506 1YS511 - YS518 1YS531 1YS536 - YS538 1YS541 - YS542 1YS546 1YS551 - YS556 1YS561 - YS578 1YS581 - YS595 1YS601 - YS690 1YS701 - YS716 1YS721 - YS762 1YS771 - YS780 1YS806 - YS810 1YS816 - YS818 1YS823 - YS825 1YS851 - YS863 1YS876 1YS881 - YS884 1YS891 - YS894 1YS896 - YS897 1YS901 - YS909 1YS911 - YS957 1YS961 - YS974 1YS976 - YS977 1YS981 - YS987 1YS991 - YS998 1YT001 - YT004 1YT006 1YT026 - YT027 1YT031 - YT032 1YT036 - YT038 1YT061 - YT068 GroupVariable Number 1YT101 - YT138 1YT176 - YT185 1YT191 1YT196 - YT199 1YT201 1YT206 - YT207 1YT211 - YT213 1YT251 - YT299 1YT301 - YT307 1YT311 - YT312 1YT321 - YT355 1YT371 - YT372 1YT381 1YT391 - YT396 1YT401 - YT403 1YT411 - YT417 1YT427 1YT461 - YT477 1YT491 - YT492 1YT501 - YT521 1YT551 - YT552 1YT556 - YT563 1YT565 1YT571 - YT578 1YT601 - YT606 1YT701 - YT708 1YT723 - YT726 1YT761 - YT781 1YT791 - YT794 1YT796 - YT797 1YT801 - YT804 1YT811 - YT813 1YT826 - YT827 GroupVariable Number 1YT831 - YT832 1YT841 - YT852 1YT856 - YT863 1YT885 - YT887 1YT891 - YT895 1YT901 - YT998 1YU001 - YU060 1YU201 - YU218 1YU301 - YU329 1YU901 - YU931 1YV001 - YV012 1YV021 - YV023 1YV030 - YV034 1YV037 - YV042 1YV045 - YV047 1YV051 - YV059 1YV081 1YV083 - YV084 1YV097 - YV099 1YV101 - YV154 1YV201 - YV203 1YV251 - YV252 1YV256 - YV257 1YV301 - YV312 1YV351 - YV368 1YV381 - YV388 1YV391 - YV394 1YV401 1YV411 - YV413 1YV431 - YV433 1YV441 - YV454 1YV461 - YV464 1YV467 - YV470 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 03, 2025 737-57A1359 RB 8 of 42 REQUIREMENTS BULLETIN 737-57A1359
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GroupVariable Number 1YV501 - YV512 1YV521 1YV571 - YV586 1YV596 1YV601 - YV605 1YV651 - YV674 1YV676 1YV695 - YV696 1YV701 - YV702 1YV711 1YV722 - YV731 1YV741 - YV794 1YV801 - YV820 1YV831 - YV848 1YV881 - YV883 1YV901 - YV915 1YV923 - YV926 1YV971 - YV983 1YW001 1YW011 - YW099 GroupVariable Number 1YW101 - YW164 1YW201 - YW212 1YW226 - YW240 1YW245 - YW261 1YW263 1YW267 - YW281 1YW283 - YW285 1YW292 - YW299 1YW351 1YW356 - YW358 1YW361 - YW366 1YW371 - YW399 1YW401 - YW430 1YW441 - YW445 1YW451 - YW452 1YW471 - YW472 1YW491 - YW498 1YW531 - YW536 1YW541 - YW545 1YW551 - YW580 GroupVariable Number 1YW585 - YW591 1YW595 - YW596 1YW601 1YW610 - YW613 1YW616 - YW623 1YW666 1YW696 - YW699 1YW701 - YW715 1YW726 - YW731 1YW766 - YW775 1YW801 - YW803 1YW811 - YW813 1YW821 1YW831 1YW881 1YW891 - YW893 1YW906 - YW910 1YW916 - YW918 1YW921 - YW925 1YW971 - YW976 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 737-57A1359 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 737-57A1359 RB mandatory.
Accomplish the required action(s), based on the applicable condition(s) in Table 1 and Table 2, in accordance with Accomplishment Instructions.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 03, 2025 737-57A1359 RB 9 of 42 REQUIREMENTS BULLETIN 737-57A1359
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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.
Table 1: Form-in-Place (FiP) Gasket Detailed Inspection (DET) and Fluid Leak Test, Left Wing Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 36 months after the Original Issue date of Requirements Bulletin 737-57A1359 RB.
Do a DET of the FiP gasket at the engine fuel shutoff valve access panel for correct sealant installation. (a) All Airplanes.
-Before further flight.CONDITION 1 (ACTION 1):CONDITION 1:
Replace the FiP gasket.INCORRECT SEALANT INSTALLATION FOUND. CONDITION 1 (ACTION 2):
Do a fluid leak test of the engine fuel shutoff valve access panel for any leak. If any leak is found, do all applicable oncondition corrective action(s) and repeat the leak test until no leak is found.
-Before further flight.Do a fluid leak test of the engine fuel shutoff valve access panel for any leak. If any leak is found, do all applicable oncondition corrective action(s) and repeat the leak test until no leak is found.
CONDITION 2:
CORRECT SEALANT IN- STALLATION FOUND.
(a) Correct sealant installation is defined as:
1. No structure is visible in the FiP gasket area.
2. The sealing surface is smooth.
3. No sealant touch-up is added after the original sealant application. It is identified by irregular, smeared, or thicker regions with different texture or appearance from the surrounding gasket, often with visible brush or tool marks.
4. Any small cavity or depression in the sealing surface which are less than or equal to 1/4 inch in width, and 1/8 inch in length, are permitted if the cavities or depressions do not extend across the full width of the sealed surface and maintain a minimum sealing surface of 1/4 inch.
5. The outboard aft corner of the gasket area is sealed and attached to the flange of the main track rib assembly and attach strap.
6. The gasket is adhered to the underlying surface and is not loose.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 03, 2025 737-57A1359 RB 10 of 42 REQUIREMENTS BULLETIN 737-57A1359
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Table 2: Form-in-Place (FiP) Gasket Detailed Inspection (DET) and Fluid Leak Test, Right Wing Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 36 months after the Original Issue date of Requirements Bulletin 737-57A1359 RB.
Do a DET of the FiP gasket at the engine fuel shutoff valve access panel for correct sealant installation. (a) All Airplanes.
-Before further flight.CONDITION 3 (ACTION 1):CONDITION 3:
Replace the FiP gasket.INCORRECT SEALANT INSTALLATION FOUND. CONDITION 3 (ACTION 2):
Do a fluid leak test of the engine fuel shutoff valve access panel for any leak. If any leak is found, do all applicable oncondition corrective action(s) and repeat the leak test until no leak is found.
-Before further flight.Do a fluid leak test of the engine fuel shutoff valve access panel for any leak. If any leak is found, do all applicable oncondition corrective action(s) and repeat the leak test until no leak is found.
CONDITION 4:
CORRECT SEALANT IN- STALLATION FOUND.
(a) Correct sealant installation is defined as:
1. No structure is visible in the FiP gasket area.
2. The sealing surface is smooth.
3. No sealant touch-up is added after the original sealant application. It is identified by irregular, smeared, or thicker regions with different texture or appearance from the surrounding gasket, often with visible brush or tool marks.
4. Any small cavity or depression in the sealing surface which are less than or equal to 1/4 inch in width, and 1/8 inch in length, are permitted if the cavities or depressions do not extend across the full width of the sealed surface and maintain a minimum sealing surface of 1/4 inch.
5. The outboard aft corner of the gasket area is sealed and attached to the flange of the main track rib assembly and attach strap.
6. The gasket is adhered to the underlying surface and is not loose.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 03, 2025 737-57A1359 RB 11 of 42 REQUIREMENTS BULLETIN 737-57A1359
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4. APPROVAL This Requirements Bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this document comply with the applicable regulations and are FAA approved, as well as European Union Aviation Safety Agency (EASA) approved for all EASA approved airplanes listed in this Requirements Bulletin effectivity. This document and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other Boeing changes.
If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this Requirements Bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this Requirements Bulletin.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 03, 2025 737-57A1359 RB 12 of 42 REQUIREMENTS BULLETIN 737-57A1359