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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-27A1325 RB Original Issue: July 14, 2023 ATA System: 2760 2761 SUBJECT: FLIGHT CONTROLS - Flight Spoiler Control System - Spoiler Control Wire Bundles 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 © 2023 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Unpublished Work.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: July 14, 2023 737-27A1325 RB 1 of 29
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Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.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 Y5
A. Airplanes5
B . S p a r e s A f f e c t e d7
2. CONCURRENT REQUIREMENTS8
3 . C O M P L I A N C E8
4. APPROVAL ................................................ 1 0
5. ACCOMPLISHMENT INSTRUCTIONS .................................. 1 1 A. General Information ......................................... 1 1 B. Work Instructions ........................................... 1 3 FIGURE 1: LEFT WING INBOARD TRAILING EDGE - SPOILER CONTROL WIRE BUNDLES - CLEARANCE MEASUREMENT ........................................ 1 6 FIGURE 2: LEFT WING INBOARD TRAILING EDGE - SPOILER CONTROL WIRE BUNDLES AND STRUCTURE - DETAILED INSPECTION .......................... 2 0 FIGURE 4: RIGHT WING INBOARD TRAILING EDGE - SPOILER CONTROL WIRE BUNDLES - CLEARANCE MEASUREMENT ................................ 2 3 FIGURE 5: RIGHT WING INBOARD TRAILING EDGE - SPOILER CONTROL WIRE BUNDLES AND STRUCTURE - DETAILED INSPECTION .......................... 2 7 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: 737-27A1325 RB Original Issue: July 14, 2023 ATA System: 2760 2761 SUBJECT: FLIGHT CONTROLS - Flight Spoiler Control System - Spoiler Control Wire Bundles 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 737-8, 737-9, 737-8200 Airplane(s), line number(s) 5602, 5668, 5788, 5852, 5902, 5948, 5992, 6034, 6074, 6114, 6154, 6188, 6222, 6272, 6290, 6308, 6326, 6344, 6360, 6372, 6384, 6396, 6408, 6420, 6430, 6441, 6448, 6456, 6464, 6472, 6481, 6490, 6499, 6508, 6515, 6521, 6528, 6535, 6542, 6548, 6555, 6562, 6569, 6575, 6582, 6589, 6594, 6598, 6603, 6607, 6612, 6616, 6621, 6625, 6630, 6634, 6639, 6643, 6648, 6652, 6657, 6661, 6666, 6672, 6677, 6681, 6686, 6690, 6695, 6699, 6704, 6708, 6713, 6717, 6722, 6726, 6731, 6735, 6740, 6749, 6753, 6758, 6762, 6767, 6771, 6776, 6780, 6783, 6785, 6789, 6792, 6794, 6796, 6803, 6805, 6807, 6810, 6814, 6816, 6819, 6821, 6825, 6828, 6830, 6834, 6837, 6839, 6841, 6843, 6848, 6850, 6852, 6855, 6859, 6861, 6864, 6866, 6868, 6872, 6875, 6877, 6881, 6884, 6886, 6890, 6893, 6895, 6897, 6899, 6904, 6906, 6908, 6911, 6915, 6917, 6920, 6922, 6926, 6929, 6931, 6935, 6938, 6940, 6942, 6944, 6949, 6951, 6953, 6956, 6960, 6963, 6965, 6968, 6970, 6973, 6975-6976, 6978, 6980, 6983, 6985, 6988, 6990-6991, 6993, 6995, 6998, 7000, 7003, 7005-7006, 7008, 7010, 7013, 7015, 7018, 7020, 7023, 7025, 7027-7028, 7030, 7033, 7035, 7038, 7040, 7042-7043, 7045, 7048, 7050, 7053, 7055, 7060, 7062, 7064-7065, 7068, 7070, 7073, 7075, 7077, 7079-7080, 7083, 7085, 7088, 7090, 7093, 7095-7096, 7098, 7100, 7103, 7105, 7108, 7110-7111, 7113, 7115, 7118, 7120, 7123, 7125, 7128, 7130, 7132-7133, 7135, 7138, 7140, 7143, 7145, 7147-7148, 7150, 7153, 7155, 7158, 7160, 7163, 7165-7166, 7168, 7170, 7173, 7175, 7178, 7180-7181, 7183, 7185-7186, 7188, 7190, 7192-7193, 7195-7196, 7198, 7200-7201, 7203, 7205, 7207-7208, 7210-7211, 7213, 7215-7216, 7218, 7220, 7222-7223, 7225-7226, 7228, 7230-7231, 7233, 7236-7238, 7240-7241, 7245-7246, 7248, 7250, 7252-7253, 7255-7256, 7258, 7261, 7265, 7267-7268, 7270-7271, 7275-7276, 7278, 7281-7283, 7285-7286, 7288, 7290-7291, 7293, 7295-7296, 7298, 7300-7301, 7303, 7305-7306, 7308, 7310-7311, 7313, 7315-7316, 7320-7321, 7326, 7328, 7330-7331, 7333, 7335-7336, 7338, 7340-7341, 7343, 7348, 7350, 7353, 7355-7356, 7358, 7360-7361, 7363, 7365-7366, 7368, 7370, 7373, 7375, 7378, 7380-7381, 7383-7386, 7388-7390, 7393-7395, 7398-7401, 7403-7406, 7409-7411, 7413-7414, 7416, 7418-7421, 7423-7425, 7428, 7430-7431, 7433-7436, 7438-7439, 7445-7446, 7448-7449, 7453-7454, 7456, Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 14, 2023 737-27A1325 RB 5 of 29
7458-7459, 7463, 7465, 7468-7469, 7473-7475, 7478-7479, 7481, 7483-7484, 7486, 7489, 7491, 7495, 7498-7500, 7504-7505, 7509, 7513-7515, 7521, 7523, 7525-7526, 7533-7535, 7538-7541, 7543, 7548-7550, 7554, 7556, 7558-7559, 7561, 7563, 7565, 7568-7569, 7571, 7574, 7578-7580, 7583, 7585-7586, 7588, 7590, 7593, 7598, 7602, 7604-7609, 7612, 7618, 7621-7623, 7626-7629, 7632, 7634, 7636-7637, 7641, 7643, 7648, 7650, 7656, 7661, 7663-7664, 7668-7670, 7672-7673, 7678-7679, 7681-7684, 7686, 7688-7689, 7694-7695, 7698, 7701-7702, 7707, 7709-7712, 7717-7719, 7724-7726, 7729-7731, 7733, 7736, 7739-7740, 7742-7744, 7747-7749, 7752-7753, 7755-7756, 7758-7759, 7762-7763, 7766-7767, 7769-7770, 7772, 7777, 7780-7781, 7783, 7785-7786, 7788-7789, 7791, 7793, 7799, 7801-7803, 7808, 7810, 7812, 7814, 7818-7819, 7821-7825, 7827, 7830, 7832, 7835-7837, 7839-7842, 7845-7847, 7850, 7852, 7854-7855, 7857, 7861-7862, 7864, 7868-7871, 7873, 7876-7877, 7879-7884, 7886, 7889-7890, 7892, 7894-7898, 7900-7904, 7909, 7913, 7915-7918, 7926-7928, 7942-7943, 7946-7947, 7951, 7957, 7959-7961, 7965, 7967, 7975-7976, 7982, 7984, 7990, 7992, 7994, 7996, 7998-8000, 8002-8003, 8006, 8009, 8013, 8016, 8019-8021, 8023-8024, 8033-8036, 8042-8044, 8047, 8052, 8054, 8063, 8066, 8071-8073, 8075, 8077, 8090-8092, 8094, 8099, 8101-8102, 8104-8120, 8122-8124, 8126-8133, 8135-8138, 8140-8141, 8144-8146, 8148, 8151-8153, 8155, 8157, 8159-8176, 8179, 8184, 8187-8188, 8191-8192, 8195-8196, 8199-8202, 8204, 8207, 8210, 8215-8216, 8218, 8222-8224, 8226-8228, 8230-8232, 8236-8238, 8243, 8246-8247, 8249, 8251-8252, 8255 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 737-8/-8200/-9 Airplanes.-1 Airplane Models:
737-8, 737-8200, 737-9 GroupVariable Number 11A001 - 1A002 11A004 - 1A062 11A070 - 1A075 11A190 - 1A197 11A201 - 1A209 11A211 11A301 - 1A325 11A329 - 1A331 11A401 - 1A414 11A451 - 1A467 11A476 - 1A488 GroupVariable Number 11A490 - 1A492 11A495 - 1A498 11A501 - 1A502 11A521 - 1A523 11A531 11A541 - 1A547 11A549 11A601 - 1A614 11A631 11A676 - 1A691 11A726 - 1A730 GroupVariable Number 11A741 - 1A743 11A751 - 1A757 11A801 11A851 - 1A880 11A884 11A887 - 1A888 11A916 - 1A921 11A926 - 1A934 11A943 11A951 - 1A964 11A967 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 14, 2023 737-27A1325 RB 6 of 29 REQUIREMENTS BULLETIN 737-27A1325
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GroupVariable Number 11B001 - 1B020 11B026 - 1B032 11B035 11B101 - 1B142 11B201 - 1B212 11B214 11B251 - 1B266 11B326 - 1B329 11B366 - 1B370 11B376 - 1B380 11B386 - 1B389 11B396 11B401 - 1B402 11B411 - 1B412 11B436 11B491 - 1B494 11B497 11B511 - 1B512 11B521 - 1B522 11B531 11B540 - 1B541 11B566 - 1B569 11B576 - 1B578 11B601 11B635 - 1B636 11B651 - 1B657 11B701 11B703 11B801 - 1B815 GroupVariable Number 11B820 - 1B825 11B930 - 1B934 11C001 - 1C005 11C201 - 1C202 11C221 - 1C224 11C237 11C256 - 1C263 11C265 11C301 - 1C303 11C326 - 1C335 11C401 - 1C404 11C451 11C501 - 1C511 11C690 11C692 11C701 - 1C720 11C826 - 1C827 11C886 11C946 - 1C950 11D002 - 1D004 11D051 - 1D066 11D101 - 1D130 11D201 - 1D203 11D236 - 1D238 11D251 - 1D253 11D401 - 1D404 11D426 - 1D440 11D456 11D466 - 1D470 GroupVariable Number 11D501 - 1D503 11D521 11D601 - 1D612 11D701 11F001 - 1F018 11F020 - 1F028 11F030 - 1F071 11J021 11J041 - 1J042 11J066 - 1J067 11J101 - 1J112 11J114 11J122 11J301 - 1J302 11J401 - 1J404 11J601 - 1J602 11J606 11J611 11K043 11K101 - 1K103 11K301 - 1K309 11K351 - 1K353 11K426 11K701 - 1K703 11L001 11L267 - 1L268 11L403 - 1L404 11L451 - 1L466 11L701 B. Spares Affected None.
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Original Issue: July 14, 2023 737-27A1325 RB 7 of 29 REQUIREMENTS BULLETIN 737-27A1325
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2. CONCURRENT REQUIREMENTS None.
3. COMPLIANCE The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to Requirements Bulletin 737-27A1325 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 737-27A1325 RB mandatory.
Accomplish the required action(s), based on the applicable condition(s) in Table 1 and Table 2, in accordance with 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.
Table 1: Left Wing Inboard Trailing Edge - Spoiler Control Wire Bundles Clearance Measurement Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time (Whichever Occurs Later) ActionCondition -Within 36 months after the Original Issue date of Requirements Bulletin 737- 27A1325 RB.
Measure the clearance between the spoiler control wire bundles and adjacent structure to see if clearance requirements are met.
(a) All Airplanes.
--No further action is required.CONDITION 1: CLEARANCE
REQUIREMENTS ARE MET AT ALL LOCATIONS.
-Before further flight.Do a Detailed Inspection of the spoiler control wire bundles and adjacent structure for chafing damage.
CONDITION 2: CLEARANCE
REQUIREMENTS ARE NOT MET AT ANY LOCATION.
-Before further flight.Adjust the spoiler control wire bundles to make sure clearance requirements are met. (a) CONDITION 2.1: WIRE BUN-
DLES AND STRUCTURE
CHAFING DAMAGE ARE NOT FOUND.
-Before further flight.CONDITION 2.2 (ACTION 1):
Repair any spoiler control wire bundles damage found and any structure damage found.
CONDITION 2.2: WIRE BUN-
DLES OR STRUCTURE CHAFING DAMAGE IS FOUND.
-Before further flight.CONDITION 2.2 (ACTION 2):
Adjust the spoiler control wire bundles to make sure clearance requirements are met. (a) Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 14, 2023 737-27A1325 RB 8 of 29 REQUIREMENTS BULLETIN 737-27A1325
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Table 1: Left Wing Inboard Trailing Edge - Spoiler Control Wire Bundles Clearance Measurement Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time (Whichever Occurs Later) ActionCondition
(a) Clearance requirements:
a. Within 0.5 inch or less from clamp edges, clearance between wire bundle and adjacent structure is greater than or equal to 0.13 inch.
b. Greater than 0.5 inch from clamp edges, clearance between wire bundle and adjacent structure is greater than or equal to 0.25 inch.
Table 2: Right Wing Inboard Trailing Edge - Spoiler Control Wire Bundles Clearance Measurement Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time (Whichever Occurs Later) ActionCondition -Within 36 months after the Original Issue date of Requirements Bulletin 737- 27A1325 RB.
Measure the clearance between the spoiler control wire bundles and adjacent structure to see if clearance requirements are met.
(a) All Airplanes.
--No further action is required.CONDITION 3: CLEARANCE
REQUIREMENTS ARE MET AT ALL LOCATIONS.
-Before further flight.Do a Detailed Inspection of the spoiler control wire bundles and adjacent structure for chafing damage.
CONDITION 4: CLEARANCE
REQUIREMENTS ARE NOT MET AT ANY LOCATION.
-Before further flight.Adjust the spoiler control wire bundles to make sure clearance requirements are met. (a) CONDITION 4.1: WIRE BUN-
DLES AND STRUCTURE
CHAFING DAMAGE ARE NOT FOUND.
-Before further flight.CONDITION 4.2 (ACTION 1):
Repair any spoiler control wire bundles damage found and any structure damage found.
CONDITION 4.2: WIRE BUN-
DLES OR STRUCTURE CHAFING DAMAGE IS FOUND.
-Before further flight.CONDITION 4.2 (ACTION 2):
Adjust the spoiler control wire bundles to make sure clearance requirements are met. (a) Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 14, 2023 737-27A1325 RB 9 of 29 REQUIREMENTS BULLETIN 737-27A1325
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Table 2: Right Wing Inboard Trailing Edge - Spoiler Control Wire Bundles Clearance Measurement Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time (Whichever Occurs Later) ActionCondition
(a) Clearance requirements:
a. Within 0.5 inch or less from clamp edges, clearance between wire bundle and adjacent structure is greater than or equal to 0.13 inch.
b. Greater than 0.5 inch from clamp edges, clearance between wire bundle and adjacent structure is greater than or equal to 0.25 inch.
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)/Joint Aviation Authorities (JAA) approved for all EASA/JAA 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 Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 14, 2023 737-27A1325 RB 10 of 29 REQUIREMENTS BULLETIN 737-27A1325
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5. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION NOTE: 1. This is an Enhanced Required for Compliance document. There will be a separate Service Bulletin (SB) and a separate Requirements Bulletin (RB). If an RB is mandated by an Airworthiness Directive (AD), then all applicable requirements specified in the RB must be done. For the related SB, some locations are marked RC Start and RC End to identify the requirements that are restated from the RB. For the related SB, the areas between RC Start and RC End, including sub-steps and any figures identified between RC Start and RC End, must be done to comply with the AD.
Therefore, an Alternative Method of Compliance (AMOC) is required for any deviations to steps between RC Start and RC End, including substeps and identified figures.
For the related SB, the steps not between RC Start and RC End may be deviated from using accepted methods in accordance with the operator's maintenance or inspection program without obtaining approval of an AMOC; this is provided that the steps between RC Start and RC End, including sub-steps and identified figures, can still be done as specified, and the airplane can be put back in an airworthy condition.
Figures not required for compliance are omitted from the RB.
2. 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.
3. The compliance times for the actions in WORK INSTRUCTIONS are in Compliance.
4. Unless shown differently, these dimensions and tolerances are used:
– Linear dimensions are in inches – Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus or minus 0.03 inch – Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch – Angular tolerance is plus or minus 2 degrees – Hole dimensions for standard solid rivets and fasteners are in Structural Repair Manual (SRM) Chapter 51 – Torque Values:
— Values for structural fasteners are given in 737 Structural Repair Manual, Chapter 51.
— Values for airframe maintenance tasks are included in Chapter 20 of 737 Aircraft Maintenance Manual (AMM).
— Values for electrical maintenance tasks are included in Chapter 20 of Standard Wiring Practices Manual (SWPM).
— Values for engine maintenance tasks are included in Chapter 70 of 737 Aircraft Maintenance Manual (AMM).
— Non-standard torque values for maintenance tasks are included in the applicable installation step.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 14, 2023 737-27A1325 RB 11 of 29 REQUIREMENTS BULLETIN 737-27A1325
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5. These work instructions refer to procedures included in other Boeing documents.
When the words "refer to" are used and the operator has an accepted alternative procedure, the accepted alternative procedure can be used. When the words "in accordance with" are included in the instruction, the procedure in the Boeing document must be used.
6. Where the work instructions include installation of a kept part, a new or serviceable part with the same part number can be installed as an alternative to the kept part.
7. If it is necessary to remove more parts for access, you can remove those parts. If you can get access without removing identified parts, it is not necessary to remove all of the identified parts. Jacking and shoring limitations must be observed.
8. Use the approved fastener, process and material substitutions in accordance with SRM Chapter 51.
9. A Detailed Inspection is defined as: An intensive examination of a specific item, installation or assembly to detect damage, failure or irregularity. This could include tactile assessment in which a component or assembly can be checked for tightness/security. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirrors and magnifying lenses may be necessary. Surface cleaning and elaborate access procedures may be required.
10. 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.
11. The instructions in Work Instructions and the figures can include operation of tools or test equipment. Boeing Engineering Tool Drawings, the Illustrated Tool and Equipment Manual, and the Special Tool and Ground Handling Drawing Index contain data on versions of the tools or test equipment that you can use. It is permitted to use replaced tools. It is not permitted to use superseded tools.
12. Refer to the SWPM 20-10-11 and SWPM 20-10-12 for the wire installation procedures, and SWPM 20-10-19 for the wire separation requirements, as accepted procedures.
13. The necessary conditions for selection of clamp type and size are included in SWPM 20-10-12. If any wire bundle support clamp specified in this service bulletin does not make a correct fit on the wire bundle, refer to SWPM 20-10-12 as an accepted procedure to select a clamp that fits correctly.
14. If the length of any fastener specified in this service bulletin does not meet installation standards given in SRM Chapter 51, then a fastener of the same specification, or an approved substitute, with a length which meets the installation standards given in SRM Chapter 51 may be used. In addition, washers may be installed for fastener grip length in accordance with SRM Chapter 51. Refer to SOPM 20-50-01 for alternate full threaded fasteners (screws) needed for installation in this service bulletin.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 14, 2023 737-27A1325 RB 12 of 29 REQUIREMENTS BULLETIN 737-27A1325