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A350
SERVICE BULLETIN REV 00 May 30/24 A350-57-P091 Page 1
CONF ALL AIRBUS 2, ROND POINT EMILE DEWOITINE 31700 BLAGNAC FRANCE
The content of this document is the property of Airbus. All rights including copyrights are reserved.
It is supplied in confidence and commercial security on its contents must be maintained.
It must not be used for any purpose other than that for which it is supplied, nor may information contained in it be disclosed to unauthorized persons.
It must not be reproduced in whole or in part without permission in writing from the owners of the copyright. Requests for reproduction of any data in this document and the media authorized for it must be addressed to Airbus.
MANDATORY MANDATORY MANDATORY ATA SYSTEM: 57 TITLE: WINGS - CENTER WING - RIB1 CORNER FITTING MISSING EDGE GLOW
SEALANT MODIFICATION No.:
None
A350
SERVICE BULLETIN
SUMMARY REV 00 May 30/24 A350-57-P091 Page 2 ATA SYSTEM: 57 TITLE: WINGS - CENTER WING - RIB1 CORNER FITTING MISSING EDGE GLOW
SEALANT
SUMMARY This summary is for information only and is not approved for modification of the aircraft.
A. MODIFICATIONS
MODIFICATION CLASSIFICATION MAJOR None MINOR None NOTE: As per EASA IR 21, a minor change is one that has no appreciable effect on the mass, balance, structural strength, reliability, operational characteristics affecting the airworthiness of the product. All other changes are major changes.
B. REASON
(1) History It has been identified that sealant may not have been applied correctly to all required locations at the corner fittings Rib 1, installed at the front and rear spar positions, top and bottom skin. The sealant provides the second layer of protection to prevent front spar or rear spar corner fittings glow in case of lighting strike.
(2) Objective/Action A one-time detailed inspection of the sealant application is required to identify and restore any areas of missing sealant in accordance with drawing requirements.
(3) Advantages Correction of any missing sealant will restore the 2 independent layers of lightning strike protection in accordance with the certification requirement.
(4) Operational/Maintenance Consequences None C. GENERAL EVALUATION
EVALUATION TABLE
COMPLIANCE MANDATORY COST SAVING NO
A/C OPERATION
AFFECTED
NO VENDOR SB NO
CANCELS INSPECTION SB NO ETOPS AFFECTED NO
PAX COMFORT AFFECTED NO POTENTIAL AD YES
RELIABILITY AFFECTED NO STRUCTURAL LIFE EXTENSION NO
LIFE LIMIT NO LINE MAINTENANCE AFFECTED NO NOTE: Service Bulletin must be accomplished.
D. MAINTENANCE CONFIGURATION
A350
SERVICE BULLETIN
SUMMARY REV 00 May 30/24 A350-57-P091 Page 3
MAINTENANCE CONFIGURATION
FUEL TANKS OPENED YES E. MATERIAL PRICE INFORMATION
(1) Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1
(a) T ask set A350-A-57-XX-P091-01000-93BA-A Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1 No material F. APPLICABILITY This Service Bulletin is applicable to this (these) operator(s):
AAR AFL AFR BAW CAL CCA CES CPA CSC CSN DAL DLH EDW ETD ETH EVE FBU FIN FJI FWI
GAF HVN IBE ITY JAL KAY MAS MAU PAL QTR SAS SIA SJX THA THY VIR WFL G. CONCURRENT REQUIREMENTS None H. NATURE OF THE WORK
(1) Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1
(a) T ask set A350-A-57-XX-P091-01000-93BA-A Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1
AIRCRAFT YES
EQUIPMENT NO I. MANPOWER
(1) Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1
(a) T ask set A350-A-57-XX-P091-01000-93BA-A Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1
MANPOWER TOTAL MAN-HOURS 34.00 h ELAPSED TIME (HOURS) 17.00 h
A350
SERVICE BULLETIN
SUMMARY Figure ICN-A350-A-57XXP091-A-FAPE3-07A70-A-001-01 Fig.SA Sol.AA SHEET 1/1 REV 00 May 30/24 A350-57-P091General Overview Page 4 J. GENERAL OVERVIEW
CONF ALL BZ641 Z541 LH RH A A
LH SHOWN
RH SYMMETRICAL RIB1 RIB2 RIB1 RIB2 RIB 1 CORNER FITTINGS TO BE INSPECTED NOTE:
B RIB1
LH SHOWN
RH SYMMETRICAL ICN-A350-A-57XXP091-A-FAPE3-07A70-A-001-01
A350
SERVICE BULLETIN REV 00 May 30/24 A350-57-P091 Page 5 ATA SYSTEM: 57 TITLE: WINGS - CENTER WING - RIB1 CORNER FITTING MISSING EDGE GLOW
SEALANT
1. PLANNING INFORMATION A. APPLICABILITY NOTE: RDAF 81339801/006/2024 is issued to perform the inspection on aircraft with Manufacturer Serial Numbers (MSN)s 0220, 0223, 0230 and 0232 before publication of this Service Bulletin.
(1) Models ON A/C 0065, 0071, 0088, 0102, 0110, 0118, 0125, 0141, 0161, 0169, 0188, 0206, 0215, 0225, 0229, 0233, 0241, 0252, 0258, 0262, 0266, 0274, 0286, 0290, 0296, 0298, 0306, 0315, 0319, 0326, 0330, 0332, 0336, 0340, 0342, 0346, 0350, 0356, 0362, 0368, 0372, 0374, 0380, 0382, 0386, 0388, 0399, 0402, 0415, 0420, 0424, 0426, 0432, 0434, 0440, 0446, 0473, 0482, 0490, 0492, 0495, 0503, 0507, 0509, 0533, 0539, 0547, 0560, 0563, 0584 350-1041 ON A/C 0005-0058, 0060-0064, 0066-0070, 0072-0087, 0089-0101, 0103-0107, 0109, 0111- 0117, 0119-0124, 0126-0130, 0132-0138, 0140, 0142-0151, 0153-0155, 0157-0160, 0162- 0165, 0167, 0168, 0170, 0172-0187, 0189-0193, 0195-0205, 0207-0214, 0216-0221, 0223, 0224, 0226-0228, 0230-0232, 0234-0240, 0243-0251, 0254-0257, 0259-0261, 0263-0265, 0267-0273, 0276-0285, 0287, 0289, 0291-0295, 0297, 0299-0303, 0305, 0307-0314, 0316, 0318, 0320-0325, 0327-0329, 0331, 0333-0335, 0337-0339, 0341, 0343-0345, 0347-0349, 0351, 0352, 0354, 0355, 0357-0359, 0363-0366, 0369-0371, 0373, 0375, 0376, 0378, 0379, 0381, 0383, 0385, 0387, 0389-0398, 0400, 0401, 0403-0408, 0410-0414, 0416-0419, 0421- 0423, 0425, 0427-0429, 0431, 0433, 0435-0437, 0439, 0441-0443, 0445, 0447-0449, 0451- 0455, 0457-0460, 0462-0466, 0468-0472, 0474-0476, 0478-0481, 0483-0485, 0487-0489, 0491, 0493, 0494, 0496, 0497, 0499, 0500, 0502, 0504-0506, 0510, 0512, 0516, 0517, 0520, 0524, 0526, 0528, 0530, 0531, 0535-0537, 0540-0546, 0548-0552, 0556, 0557, 0559, 0561, 0562, 0564, 0565, 0567-0570, 0572-0574, 0576, 0578-0580, 0582, 0583, 0588, 0593, 0596, 0599 350-941
CONF ALL
(2) Applicability by MSN 0005-0058 0060-0107 0109-0130 0132-0138 0140-0151 0153-0155 0157-0165 0167- 0170 0172-0193 0195-0221 0223-0241 0243-0252 0254-0274 0276-0287 0289-0303 0305-0316 0318-0352 0354-0359 0362-0366 0368-0376 0378-0383 0385-0408 0410- 0429 0431-0437 0439-0443 0445-0449 0451-0455 0457-0460 0462-0466 0468-0476 0478-0485 0487-0497 0499 0500 0502-0507 0509 0510 0512 0516 0517 0520 0524 0526 0528 0530 0531 0533 0535-0537 0539-0552 0556 0557 0559-0565 0567-0570 0572-0574 0576 0578-0580 0582-0584 0588 0593 0596 0599
(3) MSN by configuration
MSN CONFIGURATION 0005 0006 0007 0008 0009 0010 0011 0012 0013 0014 0015 0016 0017 0018 0019 0020 0021 0022 0023 0024 0025 0026 0027 0028 0029 0030 0031 0032 0033 0034 0035 0036 0037 0038 0039 0040 0041 0042 0043 0044 0045 0046 0047 0048 0049 0050 0051 0052 0053 0054 0055 0056 0057 0058 0060 0061 0062 0063 0064 0065 0066 0067 0068 0069 0070 0071 0072 0073 0074 0075 0076 0077 0078 0079 0080 0081 0082 001
A350
SERVICE BULLETIN REV 00 May 30/24 A350-57-P091 Page 6
MSN CONFIGURATION 0083 0084 0085 0086 0087 0088 0089 0090 0091 0092 0093 0094 0095 0096 0097 0098 0099 0100 0101 0102 0103 0104 0105 0106 0107 0109 0110 0111 0112 0113 0114 0115 0116 0117 0118 0119 0120 0121 0122 0123 0124 0125 0126 0127 0128 0129 0130 0132 0133 0134 0135 0136 0137 0138 0140 0141 0142 0143 0144 0145 0146 0147 0148 0149 0150 0151 0153 0154 0155 0157 0158 0159 0160 0161 0162 0163 0164 0165 0167 0168 0169 0170 0172 0173 0174 0175 0176 0177 0178 0179 0180 0181 0182 0183 0184 0185 0186 0187 0188 0189 0190 0191 0192 0193 0195 0196 0197 0198 0199 0200 0201 0202 0203 0204 0205 0206 0207 0208 0209 0210 0211 0212 0213 0214 0215 0216 0217 0218 0219 0220 0221 0223 0224 0225 0226 0227 0228 0229 0230 0231 0232 0233 0234 0235 0236 0237 0238 0239 0240 0241 0243 0244 0245 0246 0247 0248 0249 0250 0251 0252 0254 0255 0256 0257 0258 0259 0260 0261 0262 0263 0264 0265 0266 0267 0268 0269 0270 0271 0272 0273 0274 0276 0277 0278 0279 0280 0281 0282 0283 0284 0285 0286 0287 0289 0290 0291 0292 0293 0294 0295 0296 0297 0298 0299 0300 0301 0302 0303 0305 0306 0307 0308 0309 0310 0311 0312 0313 0314 0315 0316 0318 0319 0320 0321 0322 0323 0324 0325 0326 0327 0328 0329 0330 0331 0332 0333 0334 0335 0336 0337 0338 0339 0340 0341 0342 0343 0344 0345 0346 0347 0348 0349 0350 0351 0352 0354 0355 0356 0357 0358 0359 0362 0363 0364 0365 0366 0368 0369 0370 0371 0372 0373 0374 0375 0376 0378 0379 0380 0381 0382 0383 0385 0386 0387 0388 0389 0390 0391 0392 0393 0394 0395 0396 0397 0398 0399 0400 0401 0402 0403 0404 0405 0406 0407 0408 0410 0411 0412 0413 0414 0415 0416 0417 0418 0419 0420 0421 0422 0423 0424 0425 0426 0427 0428 0429 0431 0432 0433 0434 0435 0436 0437 0439 0440 0441 0442 0443 0445 0446 0447 0448 0449 0451 0452 0453 0454 0455 0457 0458 0459 0460 0462 0463 0464 0465 0466 0468 0469 0470 0471 0472 0473 0474 0475 0476 0478 0479 0480 0481 0482 0483 0484 0485 0487 0488 0489 0490 0491 0492 0493 0494 0495 0496 0497 0499 0500 0502 0503 0504 0505 0506 0507 0509 0510 0512 0516 0517 0520 0524 0526 0528 0530 0531 0533 0535 0536 0537 0539 0540 0541 0542 0543 0544 0545 0546 0547 0548 0549 0550 0551 0552 0556 0557 0559 0560 0561 0562 0563 0564 0565 0567 0568 0569 0570 0572 0573 0574 0576 0578 0579 0580 0582 0583 0584 0588 0593 0596 0599
(4) Configuration definition Configuration 001 CONF 001 is applicable for all the aircraft affected by this Service Bulletin as a standard configuration.
B. CONCURRENT REQUIREMENTS None C. REASON
A350
SERVICE BULLETIN REV 00 May 30/24 A350-57-P091 Page 7
(1) History It has been identified that sealant may not have been applied correctly to all required locations at the corner fittings Rib 1, installed at the front and rear spar positions, top and bottom skin. The sealant provides the second layer of protection to prevent front spar or rear spar corner fittings glow in case of lighting strike.
(2) Objective/Action A one-time detailed inspection of the sealant application is required to identify and restore any areas of missing sealant in accordance with drawing requirements.
(3) Advantages Correction of any missing sealant will restore the 2 independent layers of lightning strike protection in accordance with the certification requirement.
(4) Operational/Maintenance Consequences None D. DESCRIPTION T o accomplish this Service Bulletin it is necessary to:
(1) Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1
(a) T ask set A350-A-57-XX-P091-01000-93BA-A Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1 1 Do a Detailed Inspection of the Corner Fittings at RIB 1, LH side 2 Do a Detailed Inspection of the Corner Fittings at RIB 1, RH side 3 Depending on the Inspection Result, Apply Sealant on the Corner Fittings at RIB 1, LH side 4 Depending on the Inspection Result, Apply Sealant on the Corner Fittings at RIB 1, RH side E. COMPLIANCE
(1) Classification MANDATORY: Service Bulletin must be accomplished.
(2) Accomplishment Timescale Accomplishment of this Service Bulletin must be done within the threshold given in the table below.
This Service Bulletin has been classified Mandatory. It is expected that an Airworthiness Directive (AD) published by the European Union Aviation Safety Agency (EASA) will be issued to confirm this classification. It is anticipated that the AD will confirm the thresholds given but reference should be made to the AD for confirmation of the mandated accomplishment timescale.
T able 01, Do a Detailed Inspection of the Corner Fittings at RIB1, Left Hand (LH) side
COMPLIANCE TIME
CONDITIONS ACTION
THRESHOLD GRACE PERIOD
REPETITIVE
INTERVAL All aircraft Do a detailed inspection of the corner fittings at rib 1 in the LH wing in At the next scheduled maintenance tank entry or no later than None None
A350
SERVICE BULLETIN REV 00 May 30/24 A350-57-P091 Page 8
COMPLIANCE TIME
CONDITIONS ACTION
THRESHOLD GRACE PERIOD
REPETITIVE
INTERVAL accordance with Ref. T ask A350- A-57-XX-P091- 01ZZZ-300Z-A 78 months from issuance of Inspection Service Bulletin (ISB), whichever occurs first If the sealant is correctly applied on all the corner fitting areas rib 1 No further action None None None If the sealant is not correctly applied on the corner fitting areas rib 1 Apply sealant on the corner fittings in the LH wing with Ref.
T ask A350-A- 57-XX-P091- 01ZZZ-600Z-A Before next flight None None No further action None None None T able 02, Do a Detailed Inspection of the Corner Fittings at RIB 1, Right Hand (RH) side
COMPLIANCE TIME
CONDITIONS ACTION
THRESHOLD GRACE PERIOD
REPETITIVE
INTERVAL All aircraft Do a detailed inspection of the corner fittings at rib 1 in the RH wing in accordance with Ref. T ask A350- A-57-XX-P091- 02ZZZ-300Z-A At the next scheduled maintenance tank entry or no later than 78 months from issuance of ISB, whichever occurs first None None If the sealant is correctly applied on all the corner fitting areas rib 1 No further action None None None If the sealant is not correctly applied on the corner fitting areas rib 1 Apply sealant on the corner fittings in the RH wing with Ref. T ask A350- A-57-XX-P091- 02ZZZ-600Z-A Before next flight None None No further action None None None F. APPROVAL The technical content of this document is approved under the authority of the Design Organisation Approval ref. EASA.21J.031.
If an aircraft listed in the applicability has a modification or repair embodied that is not of AIRBUS origin, and which affects the content of this Service Bulletin, the operator
A350
SERVICE BULLETIN REV 00 May 30/24 A350-57-P091 Page 9 is responsible for obtaining approval by its airworthiness authority for any adaptation necessary before incorporation of the Service Bulletin.
G. MANPOWER The manpower estimates given in this Service Bulletin are based on the direct labor cost to do the work. These estimates assume that the work will be done by experienced personnel, and may need to be revised upwards to suit operator’s circumstances. The estimates do not include the time to prepare, plan or inspect the work. Manufacture and procurement of parts and tools, drying times for paints, sealants, etc., and general administration work are also not included.
(1) Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1
(a) T ask set A350-A-57-XX-P091-01000-93BA-A Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1
PREPARATION General Job Set-Up 0.25 h Job Set-Up on the LH Wing 14.00 h Job Set-Up on the RH Wing 14.00 h
PROCEDURE Do a Detailed Inspection of the Corner Fittings at RIB 1, LH side
1.00 h Do a Detailed Inspection of the Corner Fittings at RIB 1, RH side
1.00 h Depending on the Inspection Result, Apply Sealant on the Corner Fittings at RIB 1, LH side
0.50 h Depending on the Inspection Result, Apply Sealant on the Corner Fittings at RIB 1, RH side
0.50 h
PREPARATION FOR TEST Preparation for T est 0.25 h TEST T est 1.50 h
CLOSE-UP Close-up on the LH Wing 0.50 h Close-up on the RH Wing 0.50 h TOTAL MAN-HOURS 34.00 h ELAPSED TIME (HOURS) 17.00 h NOTE: For an explanation of the man-hours and elapsed time, refer to the Gantt Chart given in Appendix MANPOWER GANTT CHART.
NOTE: The minimum man-hours necessary to accomplish this Service Bulletin are those for the Inspection. Depending on the inspection result, additional man-hours can apply.
H. WEIGHT AND BALANCE Not changed I. ELECTRICAL LOAD DATA Not changed
A350
SERVICE BULLETIN REV 00 May 30/24 A350-57-P091 Page 10 J. REFERENCES
(1) Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1
(a) T ask set A350-A-57-XX-P091-01000-93BA-A Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1
AIRCRAFT STRUCTURAL REPAIR (ASR) A350-A-51-24-XX-01ZZZ-667Z-A A350-A-51-76-12-00ZZZ-660Z-A
CONSUMABLE MATERIAL LIST (CML) See manual
ELECTRICAL STANDARD PRACTICES (ESP) A350-A-20-55-XX-01ZZZ-042Z-A
INTRODUCTION (INTRO) A350-A-00-61-04-11ZZZ-018Z-D
MAINTENANCE PROCEDURE (MP) A350-A-24-41-XX-00ZZZ-170Z-A A350-A-57-27-71-00ZZZ-520Z-A A350-A-57-27-71-00ZZZ-720Z-A
SYSTEM DESCRIPTION (SD) A350-A-06-3X-XX-01ZZZ-04CZ-A A350-A-06-4X-XX-01ZZZ-04CZ-A A350-A-57-2X-XX-01ZZZ-04CZ-A K. PUBLICATION AFFECTED None L. INDUSTRY SUPPORT INFORMATION This Service Bulletin is the subject of an AIRBUS monitored retrofit campaign. For detailed support, please refer to the related RIL V57M24000307.
For the organization of this retrofit, you are kindly requested to contact AIRBUS retrofit management department: monitored.retrofit@airbus.com.
A350
SERVICE BULLETIN REV 00 May 30/24 A350-57-P091 Page 11
2. MATERIAL INFORMATION A. MATERIAL APPLICABILITY Material for task set A350-A-57-XX-P091-01000-93BA-A Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1
MATERIAL QTY SEE NOTES Referenced tools See SB Consumables See SB Referenced consumables See SB B. TOOLING Referenced tools for task set A350-A-57-XX-P091-01000-93BA-A Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1 T o accomplish this Service Bulletin it is necessary to use the tools listed in:
Ref. MP A350-A-57-27-71-00ZZZ-520Z-A Ref. MP A350-A-57-27-71-00ZZZ-720Z-A C. CONSUMABLES Consumables for task set A350-A-57-XX-P091-01000-93BA-A Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1
ITEM REFERENCE CML DESCRIPTION DRAWING SEE NOTES 06ABA1 Polysulfide Sealant - FuelT ank Brushable 06ACC1 Polysulfide Sealant - Low Density MultiPurpose Interfay 08BBF1 Non Aqueous Cleaner -Methyl-Ethyl-Ketone 14SBA1 T extile - Lint free Cotton Referenced consumables for task set A350-A-57-XX-P091-01000-93BA-A Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1 T o accomplish this Service Bulletin it is necessary to use the consumable materials listed in:
Ref. MP A350-A-57-27-71-00ZZZ-720Z-A D. LIST OF NEW PARTS No parts E. LIST OF EXISTING PARTS No parts
A350
SERVICE BULLETIN REV 00 May 30/24 A350-57-P091 Page 12
3. ACCOMPLISHMENT INSTRUCTIONS Task set A350-A-57-XX-P091-01000-93BA-A (A350-A-57-XX-P091-01ZZZ-93BZ-A) Detailed Inspection of the Edge Glow Sealant on the Corner Fittings at RIB 1 WARNING: MAKE SURE THAT YOU OBEY ALL THE WARNINGS AND ALL THE CAUTIONS INCLUDED IN THE REFERENCED PROCEDURES.
WARNING: IF YOU DO ABRASIVE OR POLISHING WORK IN OR NEAR A FUEL TANK, BE CAREFUL NOT TO MAKE SPARKS. SPARKS CAN CAUSE A FIRE.
WARNING: THIS PROCEDURE USES A FUEL SYSTEM ITEM THAT IS IN A CATEGORY
KNOWN AS A CRITICAL DESIGN CONFIGURATION CONTROL LIMITATION (CDCCL). CDCCL IDENTIFIES AN ITEM THAT CAN BE THE SOURCE OF A POSSIBLE FUEL TANK IGNITION. YOU MUST KEEP ALL CDCCL ITEMS IN THE APPROVED CONFIGURATION. DAMAGE, WEAR OR CHANGES TO A CDCCL ITEM CAN CAUSE A POSSIBLE TANK EXPLOSION.
CAUTION: ALWAYS OBEY THE PRECAUTIONS THAT FOLLOW TO KEEP ELECTRICAL
WIRING IN A SATISFACTORY CONDITION (ELECTRICALLY AND MECHANICALLY SERVICEABLE). WHEN YOU DO A MAINTENANCE WORK, REPAIRS OR
MODIFICATIONS, ALWAYS KEEP ELECTRICAL WIRING, COMPONENTS AND THE WORK AREA AS CLEAN AS POSSIBLE. TO DO THIS:
- PUT PROTECTION, SUCH AS PLASTIC SHEETING, CLOTHS, ETC., AS NECESSARY ON WIRING AND COMPONENTS.
- REGULARLY REMOVE ALL SHAVINGS, UNWANTED MATERIAL AND OTHER CONTAMINATION.
THESE PRECAUTIONS WILL DECREASE THE RISK OF CONTAMINATION AND DAMAGE TO THE ELECTRICAL WIRING INSTALLATION.
IF THERE IS CONTAMINATION, REFER TO Ref. ESP A350-A-20-55-XX-01ZZZ- 042Z-A.
NOTE: The accomplishment instructions of this Service Bulletin include procedures given in other documents or in other sections of the Service Bulletin. When the words “refer to” are used and the operator has a procedure accepted by the local authority he belongs to, the accepted alternative procedure can be used. When the words “in accordance with” are used then the given procedure must be followed.
NOTE: The access and close-up instructions, not comprising return to service tests, in this Service Bulletin do not constitute or affect the technical intent of the Service Bulletin.
Operators can therefore, as deemed necessary, omit or add access and/or close-up steps to add flexibility to their maintenance operations as long as the technical intent of the Service Bulletin is met within the set parameters.
NOTE: Manual titles given in the accomplishment instructions are referred to by acronyms. Refer to paragraph 1.J., References, for the definition of acronyms.
NOTE: The purpose of flowcharts is to supplement the information given in the Procedure and Compliance paragraphs and not to serve as the primary source for tasks or compliance times given in this Service Bulletin.
NOTE: This Service Bulletin is classified mandatory or expected to be classified mandatory by an Airworthiness Directive (AD). The paragraphs 3.C. and 3.E. in these accomplishment instructions are Required for Compliance (RC) and must be done to comply with the AD.
T o allow more flexibility, the rule "refer to" and "in accordance with" will apply to these paragraphs 3.C. and 3.E. Other paragraphs are recommended and may be deviated from, done as part of other actions or done with accepted methods different from those given in the Service Bulletin, as long as the RC paragraphs can be done and the aircraft can be put back into a serviceable condition.