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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-53A1382 RB Original Issue: May 06, 2019 ATA System: 5331 SUBJECT: FUSELAGE - Skin - Lower Skin at Stringer 14 Fuselage Lap Splice, Inspection 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Unpublished Work.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: May 06, 2019 737-53A1382 RB 1 of 227
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Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Table of Contents
1 . E F F E C T I V I T Y7
A. Airplanes7
B . S p a r e s A f f e c t e d9
2. CONCURRENT REQUIREMENTS9
3 . C O M P L I A N C E9
4. APPROVAL ................................................ 6 6
5. ACCOMPLISHMENT INSTRUCTIONS .................................. 6 9 A. General Information ......................................... 6 9 B. Work Instructions ........................................... 7 0 FIGURE 1: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - EXTER NAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 1, Configuration 1] ................ 1 3 2 FIGURE 2: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTER NAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 1, Configuration 1] ................ 1 3 4 FIGURE 3: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - EXTER NAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 2-3, 11, Configuration 1] ............. 1 3 6 FIGURE 4: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTER NAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 2, Configuration 1] ................ 1 3 8 FIGURE 5: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - EXTER NAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 4] ......................... 1 4 0 FIGURE 6: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTER NAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 3, Configuration 1] ................ 1 4 2 FIGURE 7: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - EXTER NAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 4-5] ........................ 1 4 4 FIGURE 8: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTER NAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 3, Configuration 1] ................ 1 4 6 FIGURE 9: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - EXTER NAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 6, Configuration 2-3] ............... 1 4 8 FIGURE 10: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 4] ......................... 1 5 0 FIGURE 11: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 6, Configuration 1] ................ 1 5 2 FIGURE 12: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 4-5] ........................ 1 5 4 FIGURE 13: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 7] ......................... 1 5 6 FIGURE 14: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 6, Configuration 2-3] ............... 1 5 8 FIGURE 15: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 8] ......................... 1 6 0 FIGURE 16: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 6, Configuration 1] ................ 1 6 2 FIGURE 17: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 9, Configuration 1; Group 10] . . ........ 1 6 4 FIGURE 18: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 7] ......................... 1 6 6 FIGURE 19: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 10] ......................... 1 6 8 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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FIGURE 20: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 8] ......................... 1 7 0 FIGURE 21: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 1, Configuration 1] ................ 1 7 2 FIGURE 22: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 9, Configuration 1] ................ 1 7 4 FIGURE 23: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 2-3, 11, Configuration 1] ............. 1 7 6 FIGURE 24: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 10] ......................... 1 7 8 FIGURE 25: SECTION 46 - SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 4] ................. 1 8 0 FIGURE 26: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 10] ......................... 1 8 2 FIGURE 27: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 4-5] ........................ 1 8 4 FIGURE 28: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - EXTE RNAL DUAL FREQUENCY EDDY CURRENT INSPECTION [Group 11, Configuration 1] ............... 1 8 6 FIGURE 29: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 6, Configuration 2-3] ............... 1 8 8 FIGURE 30: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 1, Configuration 1] ................ 1 9 0 FIGURE 31: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 6, Configuration 1] ................ 1 9 2 FIGURE 32: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 2, Configuration 1] ................ 1 9 4 FIGURE 33: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 7] ......................... 1 9 6 FIGURE 34: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 3, Configuration 1] ................ 1 9 8 FIGURE 35: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 8] ......................... 2 0 0 FIGURE 36: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 3, Configuration 1] ................ 2 0 2 FIGURE 37: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 9, Configuration 1; Group 10] . . ........ 2 0 4 FIGURE 38: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 4] ......................... 2 0 6 FIGURE 39: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14L - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 10] ......................... 2 0 8 FIGURE 40: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 4-5] ........................ 2 1 0 FIGURE 41: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 6, Configuration 2-3] ............... 2 1 2 FIGURE 42: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 6, Configuration 1] ................ 2 1 4 FIGURE 43: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 7] ......................... 2 1 6 FIGURE 44: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 8] ......................... 2 1 8 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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FIGURE 45: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 9, Configuration 1] ................ 2 2 0 FIGURE 46: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 10] ......................... 2 2 2 FIGURE 47: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 10] ......................... 2 2 4 FIGURE 48: SECTION 46 - SKIN LAP SPLICE AT STRINGER S-14R - OPEN HOLE-HIGH FREQUENCY EDDY CURRENT INSPECTION [Group 11, Configuration 1] ............... 2 2 6 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.
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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-53A1382 RB Original Issue: May 06, 2019 ATA System: 5331 SUBJECT: FUSELAGE - Skin - Lower Skin at Stringer 14 Fuselage Lap Splice, Inspection
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 737-200, 737-200C, 737-300, 737-400, 737-500 Airplane(s), line number(s) 924-927, 929-950, 952-974, 976-988, 990-991, 993-2552, 2554-2565 in 11 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 737-200 and 737-200C airplanes, line numbers 924 - 1585. Lower skin inspection at S-14L/R Lap Splice between STA 727 and STA
827.
-1 Airplanes that have not installed a skin panel replacement in accordance with service bulletin 737-53-1065.
1 Airplanes that have installed a skin panel replacement in accordance with service bulletin 737-53-1065.
2 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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DESCRIPTIONCONFIGURATIONGROUP 737-300 airplanes, line numbers 1001 - 1953. Lower skin inspection at S-14L/R between STA 727A and STA 827.
-2 Airplanes that have not installed a skin panel replacement in accordance with service bulletin 737-53-1168.
1 Airplanes that have installed a skin panel replacement in accordance with service bulletin 737-53-1168.
2 737-300 airplanes, line numbers 2089 - 2495. Lower skin inspection at S-14L between STA 727A and STA 827 and at S-14R between STA 727A and STA 847.
-3 Airplanes that have not installed a skin panel replacement in accordance with service bulletin 737-53-1168.
1 Airplanes that have installed a skin panel replacement in accordance with service bulletin 737-53-1168.
2 737-300 airplanes, line numbers 2497 - 2550. Lower skin inspection at S-14L/R between STA 727A and STA 908.
-4 737-300 airplanes, line numbers 2554 - 2565. Lower skin inspection at S-14L/R between STA 787 and STA 908.
-5 737-400 airplanes, line numbers 1487 - 2496. Lower skin inspection at S-14L between STA 727A and STA 827 and at S-14R between STA 727A and STA 847.
-6 Airplanes that have not installed a skin panel replacement between STA 727G and STA 908 in accordance with service bulletin 737-53-1187.
1 Airplanes that have installed a skin panel replacement between STA 727G and STA 908 in accordance with service bulletin 737-53-1187 at or after 53,000 Total Flight Cycles (TFC).
2 Airplanes that have installed a skin panel replacement between STA 727G and STA 908 in accordance with service bulletin 737-53-1187 before 53,000 TFC.
3 737-400 airplanes, line numbers 2501 - 2551. Lower skin inspection at S-14L/R between STA 727A and STA 908.
-7 737-400 airplanes, line numbers 2560 - 2564. Lower skin inspection at S-14L/R between STA 727G and STA 908.
-8 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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DESCRIPTIONCONFIGURATIONGROUP 737-500 airplanes, line numbers 1718 - 2494. Lower skin inspection at S-14L between STA 727A and STA 827 and S-14R between STA 727A and STA 847.
-9 Airplanes that have not installed a skin panel replacement in accordance with service bulletin 737-53-1315 1 Airplanes that have installed a skin panel replacement in accordance with service bulletin 737-53-1315.
2 737-500 airplanes, line numbers 2498 - 2552. Lower skin inspection at S-14L/R between STA 727A and STA 908.
-10 737-300 airplanes, line numbers 1955 - 2087. Lower skin inspection S-14L between STA 727A and STA 827 and S-14R between STA 727A and STA 847.
-11 Airplanes that have not installed a skin panel replacement in accordance with service bulletin 737-53-1168.
1 Airplanes that have installed a skin panel replacement in accordance with service bulletin 737-53-1168.
2 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 737-53A1382 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 737-53A1382 RB mandatory.
Accomplish the required actions, based on the applicable conditions in Tables 1 through 10, in accordance with the Accomplishment Instructions.
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.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Airplane Group Compliance Table applicability Applicable Compliance tableAirplane Group Right side inspectionLeft side inspection Table 6Table 2Group 1, Configuration 1 Table 1Table 1Group 1, Configuration 2 Table 6Table 2Group 2, Configuration 1 Table 1Table 1Group 2, Configuration 2 Table 7Table 2Group 3, Configuration 1 Table 1Table 1Group 3, Configuration 2 Table 8Table 3Group 4 Table 9Table 4Group 5 Table 6Table 2Group 6, Configurations 1, 2 and 3 Table 1Table 1Group 6, Configuration 3 Table 6Table 2Group 7 Table 9Table 4Group 8 Table 6Table 2Group 9, Configuration 1 Table 1Table 1Group 9, Configuration 2 Table 10Table 5Group 10 Table 6Table 2Group 11, Configuration 1 Table 1Table 1Group 11, Configuration 2 Group 1-3, Configuration 2; Group 6, Configuration 3; Group 9, 11, Configuration 2:
Table 1: Inspection requirements for airplanes that have installed a skin replacement in the areas of S- 14L/R Lap Splice Skin (Left and Right Side) Repeat Interval (Not to Exceed) Compliance TimeActionCondition --No further action required.Group 1:
Airplanes that replaced a skin panel in accordance with service bulletin 737- 53-1065 at or after 59,000 Total Flight Cycles (TFC) -Within 500 flight cycles after the original issue date of Requirements Bulletin 737-53A1382 RB Contact The Boeing Company for alternative inspection(s), do the inspection(s) and applicable on-condition action(s) Group 1:
Airplanes that replaced a skin panel in accordance with service bulletin 737- 53-1065 before 59,000 TFC Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Group 1-3, Configuration 2; Group 6, Configuration 3; Group 9, 11, Configuration 2:
Table 1: Inspection requirements for airplanes that have installed a skin replacement in the areas of S- 14L/R Lap Splice Skin (Left and Right Side) Repeat Interval (Not to Exceed) Compliance TimeActionCondition --No further action required.Group 2,3 and 11:
Airplanes that replaced a skin panel in accordance with service bulletin 737- 53-1168 at or after 53,000 TFC -Within 500 flight cycles after the original issue date of Requirements Bulletin 737-53A1382 RB Contact The Boeing Company for alternative inspection(s), do the inspection(s) and applicable on-condition action(s) Group 2,3 and 11: Airplanes that replaced a skin panel in accordance with service bulletin 737- 53-1168 before 53,000 TFC --No further action required.Group 9:
Airplanes that replaced a skin panel in accordance with service bulletin 737- 53-1315 at or after 53,000 TFC -Within 500 flight cycles after the original issue date of Requirements Bulletin 737-53A1382 RB Contact The Boeing Company for alternative inspection(s), do the inspection(s) and applicable on-condition action(s) Group 9:
Airplanes that replaced a skin panel in accordance with service bulletin 737- 53-1315 before 53,000 TFC -Within 500 flight cycles after the original issue date of Requirements Bulletin 737-53A1382 RB Contact The Boeing Company for alternative inspection(s), do the inspection(s) and applicable on-condition action(s) for areas common to the skin panel replacement Group 6:
Airplanes that replaced a skin panel in accordance with service bulletin 737- 53-1187 before 53,000 TFC (a)
(a) Inspections in accordance with Table 2 and Table 6 are required outside the panel replacement area.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Group 1-3, Configuration 1; Group 6-7; Group 9, 11, Configuration 1:
Table 2: Detailed Inspection, Dual Frequency Eddy Current and Open Hole - High Frequency Eddy Current Inspections of the S-14L Lap Splice Skin (Left Side) Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition -Within 3,000 flight cycles after the original issue date of Requirements Bulletin 737- 53A1382 RB but not to exceed 53,999 TFC Before 42,000 TFC Do the external DETAILED INSPECTION for any repair and any magnetic or protruding head fasteners installed Airplanes with less than 52,000 TFC as of the original issue date of Requirements Bulletin 737- 53A1382 RB -Within 2,000 flight cycles after the original issue date of Requirements Bulletin 737-53A1382 RB but not to exceed 60,999 TFC Do the external DETAILED INSPECTION for any repair and any magnetic or protruding head fasteners installed Airplanes with 52,000 TFC or more, but less than 60,000 TFC as of the original issue date of Requirements Bulletin 737- 53A1382 RB Within 1,000 flight cycles after the original issue date of Requirements Bulletin 737-53A1382 RB but not to exceed 67,499 TFC Do the external DETAILED INSPECTION for any repair and any magnetic or protruding head fasteners installed Airplanes with 60,000 TFC or more, but less than 67,000 TFC as of the original issue date of Requirements Bulletin 737- 53A1382 RB -Within 500 flight cycles after the original issue date of Requirements Bulletin 737-53A1382 RB Do the external DETAILED INSPECTION for any repair and any magnetic or protruding head fasteners installed Airplanes with 67,000 TFC or more as of the original issue date of Requirements Bulletin 737- 53A1382 RB -Before further flightCONDITION 1CONDITION 1:
ACTION 1:ANY REPAIR FOUND Contact The Boeing Company for alternative inspection(s), do the inspection(s) and applicable on-condition action(s)
(b) -Before further flightCONDITION 1 ACTION 2:
Do the external DUAL FRE-
QUENCY EDDY CURRENT (DFEC) INSPECTION of the lower skin along the lap splice lower fastener row at the unrepaired areas for any crack (b) Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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