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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-53A1383 RB Original Issue: May 09, 2019 Revision 3: July 30, 2025 ATA System: 5331 SUBJECT: FUSELAGE - Structure Around Openings - Forward Galley Door Bear Strap and Stub Frame Inspection 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: May 09, 2019 737-53A1383 RBRevision 3: July 30, 2025 1 of 79
5.0
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: May 09, 2019 737-53A1383 RBRevision 3: July 30, 2025 2 of 79 REQUIREMENTS BULLETIN 737-53A1383
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Table of Contents
Revision Transmittal Sheet5
1. EFFECTIVITY9
A. Airplanes9
B. Spares Affected18
2. CONCURRENT REQUIREMENTS18
3. COMPLIANCE19
4. APPROVAL37
5. ACCOMPLISHMENT INSTRUCTIONS39
A. General Information39
B. Work Instructions40
FIGURE 1: FORWARD GALLEY DOOR BEAR STRAP - INTERNAL GENERAL VISUAL INSPECTION OF
THE BEAR STRAP63
FIGURE 2: FORWARD GALLEY DOOR BEAR STRAP - INTERNAL HIGH FREQUENCY EDDY CURRENT
(HFEC) INSPECTION OF THE BEAR STRAP65
FIGURE 3: FORWARD GALLEY DOOR BEAR STRAP - EXTERNAL GENERAL VISUAL INSPECTION
OF THE FUSELAGE SKIN AND GAP COVER68
FIGURE 4: FORWARD GALLEY DOOR BEAR STRAP - EXTERNAL EDDY CURRENT INSPECTIONS
OF THE BEAR STRAP AND FUSELAGE SKIN70
FIGURE 5: FORWARD GALLEY DOOR STUB FRAME - INTERNAL GENERAL VISUAL INSPECTION OF
THE STUB FRAME74
FIGURE 6: FORWARD GALLEY DOOR STUB FRAME - INTERNAL HIGH FREQUENCY EDDY CURRENT
(HFEC) INSPECTION OF THE STUB FRAME77
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: May 09, 2019 737-53A1383 RBRevision 3: July 30, 2025 3 of 79 REQUIREMENTS BULLETIN 737-53A1383
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Export Controlled ECCN: 9E991 See page 1 for details Original Issue: May 09, 2019 737-53A1383 RBRevision 3: July 30, 2025 4 of 79 REQUIREMENTS BULLETIN 737-53A1383
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Commercial Airplanes 737 Requirements Bulletin ALERT Revision Transmittal SheetNumber: 737-53A1383 RBOriginal Issue: May 09, 2019 Revision 3: July 30, 2025 ATA System: 5331 SUBJECT: FUSELAGE - Structure Around Openings - Forward Galley Door Bear Strap and Stub Frame Inspection This revision includes all pages of the requirements bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Airworthiness Directive AD 2021-02-13 is related to Requirements Bulletin 737-53A1383 RB. The effective date of AD 2021-02-13 is March 30, 2021.
The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to Requirements Bulletin 737-53A1383 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 737-53A1383 RB mandatory.
Effects of this revision on airplanes on which the Original Issue or Revision 1 or Revision 2 was previously done:
ActionConditionGroup Continue repetitive inspection of the bear strap in accordance with Table 1: Option 1 and do inspection of the stub frame in accordance with Table 5.
Airplanes that have accomplished the Original Issue or Revision 1 of this bulletin and have done Table 1: Option 1 inspection.
Group 1, Configuration 1 Continue repetitive inspection of the bear strap in accordance with Table 1: Option 1 and continue repetitive inspection of the stub frame in accordance with Table 5.
Airplanes that have accomplished Revision 2 of this bulletin and have done Table 1: Option 1 and Table 5 inspections.
Note: The inspection of the stub frame in Figure 5 and Figure 6 have been extended to include one more fastener.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: May 09, 2019 737-53A1383 RBRevision 3: July 30, 2025 5 of 79
ActionConditionGroup Continue repetitive inspection of the bear strap in accordance with Table 2: Option 2 and do inspection of the stub frame in accordance with Table 6.
Airplanes that have accomplished the Original Issue or Revision 1 of this bulletin and have done Table 2: Option 2 inspection. The last action accomplished was an external Low Frequency Eddy Current (LFEC) inspection of the bear strap and an external High Frequency Eddy Current (HFEC) inspection of the fuselage skin, and no crack was found.
Group 1, Configuration 2 Continue repetitive inspection of the bear strap in accordance with Table 2: Option 2 and continue repetitive inspection of the stub frame in accordance with Table 6.
Airplanes that have accomplished Revision 2 of this bulletin and have done Table 2: Option 2 and Table 6 inspections. The last action accomplished was an external Low Frequency Eddy Current (LFEC) inspection of the bear strap and an external High Frequency Eddy Current (HFEC) inspection of the fuselage skin, and no crack was found.
Note: The inspection of the stub frame in Figure 5 and Figure 6 have been extended to include one more fastener.
Continue repetitive inspection of the bear strap in accordance with Table 2: Option 2 and do inspection of the stub frame in accordance with Table 5.
Airplanes that have accomplished the Original Issue or Revision 1 of this bulletin, have done Table 2: Option 2 inspection, and are not in Group 1, Configuration 2.
Group 1, Configuration 3 Continue repetitive inspection of the bear strap in accordance with Table 2: Option 2 and continue repetitive inspection of the stub frame in accordance with Table 5.
Airplanes that have accomplished Revision 2 of this bulletin, have done Table 2: Option 2 and Table 5 inspections, and are not in Group 1, Configuration 2.
Note: The inspection of the stub frame in Figure 5 and Figure 6 have been extended to include one more fastener.
Continue repetitive inspection of the bear strap in accordance with Table 3: Option 1 and continue repetitive inspection of the stub frame in accordance with Table 7.
Airplanes that have accomplished Revision 2 of this bulletin and have done Table 3: Option 1 and Table 7 inspections.
Group 2, Configuration 1 Note: The inspection of the stub frame in Figure 5 and Figure 6 have been extended to include one more fastener.
Continue repetitive inspection of the bear strap in accordance with Table 4: Option 2 and continue repetitive inspection of the stub frame in accordance with Table 7.
Airplanes that have accomplished Revision 2 of this bulletin and have done Table 4: Option 2 and Table 7 inspections.
Group 2, Configuration 2 Note: The inspection of the stub frame in Figure 5 and Figure 6 have been extended to include one more fastener.
REASON FOR REVISION This revision is sent to provide instructions to use Structural Repair Manual (SRM) for repair if any crack is found during the inspection of the bear strap and fuselage skin, and to provide instructions to replace the stub frame if any crack is found during inspection of the stub frame. In addition, this revision is sent to extend the inspection area of the stub frame.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: May 09, 2019 737-53A1383 RBRevision 3: July 30, 2025 6 of 79 REQUIREMENTS BULLETIN 737-53A1383
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These sections were changed:
– In Effectivity, Airplanes: Updated group configuration table.
– In Compliance: Updated Tables 1 through 7. Added Table 8.
– In Accomplishment Instructions, General Information: Added general notes.
– In Accomplishment Instructions, Work Instructions: Updated Tables 1 through 7. Added Table 8.
– FIGURE 4: Updated illustration and step table.
– FIGURE 5: Updated illustration.
– FIGURE 6: Updated illustration.
Vertical lines are put on the left edge of each page, except in Effectivity and format changes, to show the location of all content changes.
Pages with no vertical lines have no changes.
REVISION HISTORY Service BulletinService BulletinRequirement BulletinRequirement Bulletin 737-53A1383737-53A1383737-53A1383 RB737-53A1383 RB Issue DateIssue Date May 09, 2019Original Issue:May 09, 2019Original Issue:
February 19, 2020Revision 1:February 19, 2020Revision 1:
June 23, 2023Revision 2:June 23, 2023Revision 2:
July 30, 2025Revision 3:July 30, 2025Revision 3:
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: May 09, 2019 737-53A1383 RBRevision 3: July 30, 2025 7 of 79 REQUIREMENTS BULLETIN 737-53A1383
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Export Controlled ECCN: 9E991 See page 1 for details Original Issue: May 09, 2019 737-53A1383 RBRevision 3: July 30, 2025 8 of 79 REQUIREMENTS BULLETIN 737-53A1383
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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-53A1383 RB Original Issue: May 09, 2019 Revision 3: July 30, 2025 ATA System: 5331 SUBJECT: FUSELAGE - Structure Around Openings - Forward Galley Door Bear Strap and Stub Frame Inspection
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 737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER Airplane(s), line number(s) 1-2598, 2600-2721, 2723-2813, 2815-2930, 2932-3068, 3070-3323, 3325-3425, 3427-3521, 3523-3611, 3613-3701, 3703-3791, 3793-3878, 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, Export Controlled ECCN: 9E991 See page 1 for details Original Issue: May 09, 2019 737-53A1383 RBRevision 3: July 30, 2025 9 of 79
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, 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, 9274, 9430-99999 in 2 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.
NOTE: The Variable Number table below includes affected airplanes available as of the issue date of this bulletin. Affected airplane Variable Numbers added to MyBoeingFleet.com after the issue date of this bulletin will be shown using the Maintenance Performance Toolbox EFFECTIVITY search function result.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: May 09, 2019 737-53A1383 RBRevision 3: July 30, 2025 10 of 79 REQUIREMENTS BULLETIN 737-53A1383
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DESCRIPTIONCONFIGURATIONGROUP 737-600, 737-700, 737-700C, 737-800, and 737-900 airplanes, line numbers 1 through 1762.
-1 Airplanes that have accomplished the Original Issue or Revision 1 or Revision 2 of this bulletin and have done Table 1: Option 1 inspection.
1 Airplanes that have accomplished the Original Issue or Revision 1 or Revision 2 of this bulletin and have done Table 2: Option 2 inspection. The last action accomplished was an external Low Frequency Eddy Current (LFEC) inspection of the bear strap and an external High Frequency Eddy Current (HFEC) inspection of the fuselage skin, and no crack was found.
2 Airplanes that have accomplished the Original Issue or Revision 1 or Revision 2 of this bulletin, have done Table 2: Option 2 inspection, and are not in Group 1, Configuration 2.
3 Airplanes that have not accomplished the Original Issue or Revision 1 or Revision 2 of this bulletin.
4 737-600, 737-700, 737-700C, 737-800, 737-900, and 737-900ER airplanes, line numbers 1763 and subsequent.
-2 Airplanes that have accomplished Revision 2 of this bulletin and have done Table 3: Option 1 and Table 7 inspections.
1 Airplanes that have accomplished Revision 2 of this bulletin and have done Table 4: Option 2 and Table 7 inspections.
2 Airplanes that have not accomplished Revision 2 of this bulletin.3 Airplane Models:
737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER GroupVariable Number 1YA001 - YA099 1YA101 - YA199 1YA201 - YA211 1YA221 1YA231 - YA242 1YA251 - YA256 GroupVariable Number 1YA271 - YA272 1YA291 1YA301 - YA302 1YA311 - YA314 1YA321 - YA323 1YA336 - YA345 GroupVariable Number 1YA351 1YA356 - YA357 1YA366 - YA367 1YA371 - YA377 1YA501 - YA536 1YA541 - YA552 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: May 09, 2019 737-53A1383 RBRevision 3: July 30, 2025 11 of 79 REQUIREMENTS BULLETIN 737-53A1383
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GroupVariable Number 1YA571 - YA578 1YA601 - YA615 1YA621 - YA622 1YA626 - YA631 1YA635 - YA636 1YA641 - YA642 1YA645 - YA650 1YA656 - YA659 1YA666 - YA667 1YA671 - YA672 1YA681 - YA691 1YA701 - YA710 1YA721 - YA722 1YA731 - YA734 1YA751 - YA756 1YA801 - YA803 1YA809 1YA811 - YA814 1YA831 - YA835 1YA841 - YA862 1YA881 - YA882 1YA891 - YA892 1YA961 - YA976 2YA977 - YA978 1YB001 - YB006 1YB101 - YB132 1YB151 - YB153 1YB156 - YB158 1YB161 - YB164 1YB171 - YB172 1YB181 - YB184 1YB201 - YB208 1YB271 GroupVariable Number 1YB276 1YB301 - YB310 1YB371 - YB381 2YB382 - YB392 1YB501 - YB502 1YB521 - YB526 1YB541 - YB544 1YB551 1YB561 - YB574 2YB575 1YB576 - YB577 2YB578 - YB580 1YB581 - YB587 2YB588 - YB598 1YB601 - YB632 2YB633 - YB636 1YB651 1YB656 2YB671 - YB672 1YB851 - YB863 1YB871 - YB873 2YB874 1YB881 - YB888 2YB889 - YB893 1YB901 - YB903 1YB911 2YB961 - YB975 2YB981 2YB986 - YB998 1YC001 - YC030 1YC051 - YC083 2YC084 1YC091 - YC094 GroupVariable Number 2YC095 1YC101 - YC104 1YC111 - YC113 1YC121 1YC126 - YC127 1YC136 - YC141 1YC146 - YC147 1YC151 - YC156 1YC166 - YC171 1YC176 - YC178 2YC179 1YC186 - YC189 2YC190 1YC201 - YC203 1YC206 - YC207 1YC301 - YC305 1YC321 - YC386 2YC387 1YC391 - YC394 1YC396 1YC401 - YC417 1YC421 - YC422 1YC426 - YC428 1YC436 - YC437 2YC438 - YC439 1YC441 - YC448 1YC451 - YC455 1YC459 1YC461 - YC467 1YC471 - YC499 1YC501 - YC526 1YC571 - YC583 1YC587 - YC589 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: May 09, 2019 737-53A1383 RBRevision 3: July 30, 2025 12 of 79 REQUIREMENTS BULLETIN 737-53A1383