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Commercial Airplanes 747 Service Bulletin ALERT Number: 747-53A2861 Original Issue: April 01, 2014 ATA System: 5331 SUBJECT: FUSELAGE - Skin - Lower Lobe Skin Inspection for Corrosion at Circumferential Splice Locations 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:
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET Copyright © 2014 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Unpublished Work.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: April 01, 2014 747-53A2861 1 of 77
4.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 01, 2014 747-53A2861 2 of 77 BOEING SERVICE BULLETIN 747-53A2861
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BLANK PAGE
Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected ........................................ 1 7 B. Concurrent Requirements ...................................... 1 7 C. Reason ................................................ 1 7 D. Description .............................................. 1 7 E. Compliance .............................................. 1 8 F. Approval ............................................... 4 2 G. Manpower .............................................. 4 2 H. Weight and Balance Changes .................................... 4 3 I. Electrical Load Data ......................................... 4 3 J. References .............................................. 4 3
1. Existing Data: ......................................... 4 3
2. Data Supplied with this Service Bulletin: ........................... 4 3
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 4 3 K. Publications Affected ........................................ 4 4 L. Interchangeability and Intermixability of Parts ........................... 4 4 M. Software Accomplishment Summary ................................ 4 4
2. MATERIAL INFORMATION ........................................ 4 5 A. Material - Price and Availability ................................... 4 5 B. Industry Support Information .................................... 4 5 C. Parts Necessary for Each Airplane ................................. 4 5
1. Kits/Parts ............................................ 4 5
2. Parts and Materials Supplied by the Operator ........................ 4 5
3. Parts Modified and Reidentified ................................ 4 5
4. Parts Removed and Not Replaced .............................. 4 5 D. Parts Necessary to Change Spares ................................. 4 5 E. Special Tooling - Price and Availability ............................... 4 5 F. Special Tooling Necessary to do this Service Bulletin ....................... 4 5
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 4 7 A. GENERAL INFORMATION ..................................... 4 7 B. WORK INSTRUCTIONS ....................................... 4 9 FIGURE 1: INSPECTION AREA 1 (STA 741) [Group 1] ......................... 5 4 FIGURE 2: INSPECTION AREA 2 (STA 1741) [Group 1] ......................... 5 6 FIGURE 3: INSPECTION AREA 3 (STA 1961) [Group 1] ......................... 5 8 FIGURE 4: INSPECTION AREA 4 (STA 2181) [Group 1] ......................... 6 0 FIGURE 5: INSPECTION AREA 2 (STA 1741) [Group 2] ......................... 6 2 FIGURE 6: INSPECTION AREA 3 (STA 1961) [Group 2] ......................... 6 4 FIGURE 7: WING TO BODY FAIRING PANEL REMOVAL [Group 2] .................. 6 6 FIGURE 8: WING TO BODY FAIRING PANEL INSTALLATION [Group 2] ............... 6 8 APPENDIX A: LOGIC DIAGRAM - GROUP 1 ................................. 7 0 APPENDIX B: LOGIC DIAGRAM - GROUP 2 ................................. 7 2 APPENDIX C: GROUP 1 SKIN PANEL DATA [Group 1] ........................... 7 5 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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APPENDIX D: GROUP 2 (747SP) SKIN PANEL DATA [Group 2] ...................... 7 7 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 01, 2014 747-53A2861 4 of 77 BOEING SERVICE BULLETIN 747-53A2861
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Commercial Airplanes 747 Service Bulletin ALERT SummaryNumber: 747-53A2861Original Issue: April 01, 2014 ATA System: 5331 SUBJECT: FUSELAGE - Skin - Lower Lobe Skin Inspection for Corrosion at Circumferential Splice Locations
THIS BULLETIN 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 SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.
CONCURRENT REQUIREMENTS None.
BACKGROUND This service bulletin gives instructions to do external inspections of the skin in the lower lobe at certain circumferential splice locations for corrosion and cracks. Skin corrosion that is not found and repaired can result in cracks, which can become large and adversely affect the structural integrity of the airplane.
Several operators have reported that corrosion was found on the mating surfaces between the skin and stringers in Section 42 and Section 46 at the circumferential skin splices. There were no visual indications of corrosion apparent during both internal and external inspections of the affected areas. Review of the applicable drawings shows that the stringers in these circumferential splice locations were not installed with faying surface sealant.
Fillet seals were applied on both the upper and lower sides of the stringer, so if a fillet seal is compromised, moisture can enter the area and result in corrosion in the area between the skin and the stringer.
Accomplishment of the inspections in this service bulletin will help ensure the structural integrity of the fuselage skin at the affected circumferential splice locations.
Boeing Service Related Problem (SRP) 747-SRP-53-0392 is related to this service bulletin.
This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedNoSpares Affected Paragraph 1.E., Compliance and Paragraph
1.F., Approval YesAD Related Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 01, 2014 747-53A2861 5 of 77
ReferenceAffectedPlanning Data Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedNoPublications Affected Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator NoOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION Do external General Visual Inspections (GVI) of the fuselage skin at the lower circumferential splices at STA 741 (Group 1 only), STA 1741, STA 1961 and STA 2181 (Group 1 only) for the presence of existing external skin repair doublers or production doublers. If existing repair doublers or production doublers that cover the skin common to the stringers are found, do surface Low Frequency Eddy Current (LFEC) inspections of the doublers for cracks in the skin in the areas common to the stringers that are covered by the repair doublers or production doublers. If cracks are found, repair in accordance with this service bulletin.
If no existing external repair doublers or production doublers are found, and in affected areas not covered by existing repair doublers or production doublers, do external surface LFEC inspections of the fuselage skin in the affected areas for corrosion that may exist between the skin inner surface and the stringers.
If corrosion is found, repair in accordance with this service bulletin. In areas where no corrosion was found, do external surface High Frequency Eddy Current (HFEC) inspections of the skin at the fastener locations common to the skin and stringers for cracks. Repair any crack found in accordance with this service bulletin.
If no corrosion is found, do external surface HFEC inspections of the skin at the fastener locations common to the skin and stringers for cracks. Repair any crack found in accordance with this service bulletin.
Repeat the inspections in this service bulletin at the times given in Paragraph 1.E., Compliance.
EFFECTIVITY 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR and 747SP Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
COMPLIANCE The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory.
Refer to Paragraph 1.E., Compliance.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspection and repair procedures given in this service bulletin.
MANPOWER Elapsed HoursTotal Task HoursAirplanes
32.75121.25Group 1
22.5085.50Group 2 Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION None.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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BOEING SERVICE BULLETIN 747-53A2861
ALERT ALERT STA 741 STA 1741
STA STA 1961 2181 GROUP 1
DO EXTERNAL SURFACE LOW FREQUENCY
EDDY CURRENT INSPECTIONS FOR
CORROSION, AND SURFACE HIGH
FREQUENCY EDDY CURRENT INSPECTIONS
FOR CRACKS AT CERTAIN LOWER LOBE
SKIN SPLICE LOCATIONS STA STA 1961 1741 GROUP 2 2258288 Original Issue: April 01, 2014 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 747-53A2861 Work - See page 1 for details. 8 of 77
Commercial Airplanes 747 Service Bulletin ALERT Number: 747-53A2861 Original Issue: April 01, 2014 ATA System: 5331 SUBJECT: FUSELAGE - Skin - Lower Lobe Skin Inspection for Corrosion at Circumferential Splice Locations
THIS BULLETIN 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 SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes Refer to Service Bulletin Index D6-30300 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is applicable to 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR and 747SP airplanes line number 310 through 1419, except 747 Large Cargo Freighter (LCF) airplanes, in two Groups. The Variable Numbers and Group Information for the applicable airplanes is given below.
DESCRIPTIONCONFIGURATIONGROUP 747 airplanes line number 310 through 1419, except 747 Large Cargo Freighter (LCF) airplanes and 747SP airplanes.
-1 747SP airplanes line number 310 through 1419.-2 Airplane Models:
747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SP, 747SR GroupVariable Number 1RA544 - RA548 1RA726 - RA731 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 01, 2014 747-53A2861 9 of 77
GroupVariable Number 1RA750 1RA784 1RB411 - RB413 1RB421 1RB681 - RB697 1RB711 1RB721 - RB723 1RB741 - RB748 1RD047 - RD059 1RD081 - RD083 1RD091 - RD092 1RD122 - RD127 1RD134 - RD144 1RD166 - RD167 1RD171 - RD172 1RD181 - RD183 1RD201 - RD204 1RD221 - RD227 1RD231 - RD235 1RD241 - RD243 1RD251 - RD262 1RD271 - RD272 1RD291 - RD292 1RD301 - RD302 1RD311 1RD351 - RD358 1RD361 - RD366 1RD381 - RD383 1RD411 - RD414 1RD421 - RD426 1RD431 - RD435 1RD441 - RD442 1RD451 - RD456 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1RD461 1RD471 - RD475 1RD513 - RD519 1RD531 - RD533 1RD551 1RD561 1RD571 1RD581 - RD583 1RD591 - RD593 1RD603 - RD607 1RD643 - RD649 1RD652 - RD659 1RD661 1RD671 1RD701 - RD702 1RD721 - RD722 1RD741 - RD742 1RD751 - RD755 1RD761 1RD771 - RD775 1RD781 - RD783 1RD791 - RD792 1RE001 1RF001 - RF006 2RG006 - RG009 2RG095 2RG104 2RG161 - RG164 2RG172 - RG174 2RG191 - RG193 2RG211 - RG213 2RG221 - RG222 2RH101 - RH102 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 2RH111 - RH112 2RH121 - RH122 1RJ152 1RJ303 1RJ321 - RJ322 1RJ331 - RJ333 1RL401 - RL403 1RL411 - RL436 1RL451 - RL456 1RL461 - RL462 1RL471 - RL481 1RL491 - RL492 1RL501 - RL502 1RL511 - RL516 1RL521 - RL522 1RL531 - RL534 1RL551 1RL561 - RL568 1RL571 - RL572 1RL576 - RL577 1RL579 1RL581 - RL586 1RL651 - RL655 1RL671 - RL675 1RL681 - RL684 1RL751 - RL752 1RM001 - RM007 1RM010 - RM013 1RM021 - RM024 1RM026 - RM030 1RM036 - RM045 1RM051 - RM053 1RM071 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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