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Commercial Airplanes 747 Service Bulletin ALERT Number: 747-53A2887 Original Issue: December 02, 2015 ATA System: 5315 SUBJECT: FUSELAGE - Nose Wheel Well - Body Structure Reinforcement Modification and 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:

BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET Copyright © 2015 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Unpublished Work.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: December 02, 2015 747-53A2887 1 of 85

5.0

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

Original Issue: December 02, 2015 747-53A2887 2 of 85 BOEING SERVICE BULLETIN 747-53A2887

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BLANK PAGE

Table of Contents

S u m m a r y5

1. PLANNING INFORMATION9

A . E f f e c t i v i t y9

1. Airplanes9

2 . S p a r e s A f f e c t e d ........................................ 1 9 B. Concurrent Requirements ...................................... 1 9 C. Reason ................................................ 1 9 D . D e s c r i p t i o n .............................................. 2 0 E. Compliance .............................................. 2 1 F . A p p r o v a l ............................................... 2 5 G. Manpower .............................................. 2 6 H. Weight and Balance Changes .................................... 2 6 I. Electrical Load Data ......................................... 2 6 J . R e f e r e n c e s .............................................. 2 7

1. Existing Data: ......................................... 2 7

2. Data Supplied with this Service Bulletin: ........................... 2 7

3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 2 7 K. Publications Affected ........................................ 2 7 L. Interchangeability and Intermixability of Parts ........................... 2 8 M. Software Accomplishment Summary ................................ 2 8

2. MATERIAL INFORMATION ........................................ 2 9 A. Material - Price and Availability ................................... 2 9 B. Industry Support Information .................................... 2 9 C . P a r t s N e c e s s a r y f o r E a c h A i r p l a n e ................................. 2 9 1 . K i t s / P a r t s ............................................ 2 9

2. Parts and Materials Supplied by the Operator ........................ 2 9

3. Parts Modified and Reidentified ................................ 2 9

4. Parts Removed and Not Replaced .............................. 2 9 D. Parts Necessary to Change Spares ................................. 3 0 E. Special Tooling - Price and Availability ............................... 3 0 F. Special Tooling Necessary to do this Service Bulletin ....................... 3 0

3. ACCOMPLISHMENT INSTRUCTIONS .................................. 3 1 A. GENERAL INFORMATION ..................................... 3 1 B. WORK INSTRUCTIONS ....................................... 3 3 FIGURE 1: LEFT SIDE NOSE WHEEL WELL BODY STRUCTURE - DETAILED INSPECTION [Group 1-2, Configuration 1; Group 3, 5] .................................. 3 6 FIGURE 2: RIGHT SIDE NOSE WHEEL WELL BODY STRUCTURE - DETAILED INSPECTION [Group 1-2, Configuration 1; Group 3, 5] ............................... 4 3 FIGURE 3: LEFT SIDE NOSE WHEEL WELL BODY STRUCTURE - DETAILED INSPECTION [Group 1-2, Configuration 2; Group 4, 6] .................................. 5 0 FIGURE 4: RIGHT SIDE NOSE WHEEL WELL BODY STRUCTURE - DETAILED INSPECTION [Group 1-2, Configuration 2; Group 4, 6] ............................... 5 6 FIGURE 5: LEFT SIDE STA 280-320 VERTICAL BEAM OUTER CHORD AND WEB – SURFACE HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION [Group 1, 4] ............ 6 2 FIGURE 6: RIGHT SIDE STA 280-320 VERTICAL BEAM OUTER CHORD AND WEB – SURFACE HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION [Group 1, 4] ............ 6 5 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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FIGURE 7: LEFT SIDE STA 280-320 VERTICAL BEAM OUTER CHORD AND WEB – OPEN HOLE HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION [Group 1, 4] ............ 6 8 FIGURE 8: RIGHT SIDE STA 280-320 VERTICAL BEAM OUTER CHORD AND WEB – OPEN HOLE HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION [Group 1, 4] ............ 7 0 FIGURE 9: LEFT SIDE STA 280-320 VERTICAL BEAM OUTER CHORD AND WEB – RIVET INSTALLATION [Group 1] ............................................ 7 2 FIGURE 10: RIGHT SIDE STA 280-320 VERTICAL BEAM OUTER CHORD AND WEB – RIVET INSTALLATION [Group 1] ................................... 7 4 FIGURE 11: LEFT SIDE STA 280-320 VERTICAL BEAM OUTER CHORD AND WEB – BOLT INSTALLATION [Group 4] ............................................ 7 6 FIGURE 12: RIGHT SIDE STA 280-320 VERTICAL BEAM OUTER CHORD AND WEB – BOLT INSTALLATION [Group 4] ................................... 7 8 APPENDIX A: LOGIC DIAGRAM FOR TABLE 1 - MODIFICATION AND INSPECTION [Group 1, 4] . . . 80 APPENDIX B: LOGIC DIAGRAM FOR TABLE 2 - DETAILED INSPECTION [Group 2-3, 5-6] ....... 8 4 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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Commercial Airplanes 747 Service Bulletin ALERT SummaryNumber: 747-53A2887Original Issue: December 02, 2015 ATA System: 5315 SUBJECT: FUSELAGE - Nose Wheel Well - Body Structure Reinforcement Modification and Inspection

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 the modification required in accordance with service bulletin 747-53A2293 Areas 1, 3 and 4. If the modification work has been previously accomplished in accordance with service bulletin 747-53A2293, then there is no further modification work required. The modification provided in service bulletin 747-53A2293 for Areas 1, 3, and 4 must be completed to meet the intent of Widespread Fatigue Damage (WFD) methods. This service bulletin also gives instructions to inspect for fatigue cracking in the Nose Wheel Well Body Structure. If the inspections given in this service bulletin are not done, fatigue cracking could remain undetected. Such fatigue cracking could adversely affect the structural integrity of the airplane.

Boeing Service Related Problem (SRP) 747-SRP-53-0479 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 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) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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ReferenceAffectedPlanning Data Paragraph 2.C.1., Kits/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator YesOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION Group 1, 4:

Do the modification in accordance with service bulletin 747-53A2293 at the times given in Paragraph 1.E., Compliance of this service bulletin. If the modification work has been done in accordance with service bulletin 747-53A2293, no further modification work is required. Do a detailed inspection of the vertical beams, vertical beam clips, main deck floor beams and the fore aft stiffeners for cracks and do a surface or open hole High Frequency Eddy Current (HFEC) inspection of the vertical beams outer chord and web for cracks. If any crack is found, do a detailed inspection of adjacent structure to determine the full extent of the damage, contact Boeing for repair instructions and do the repair, then repeat detailed inspection and surface or open hole HFEC inspections at the times given in Paragraph 1.E., Compliance. If no crack is found, repeat detailed inspection and surface or open hole HFEC inspections at the times given in Paragraph 1.E., Compliance.

Group 2-3, 5-6:

Do a detailed inspection of the vertical beams, vertical beam clips, main deck floor beams and the stiffeners for cracks. If any crack is found, do a detailed inspection of adjacent structure to determine the full extent of the damage, contact The Boeing Company for repair instructions and do the repair, then repeat detailed inspections for cracks at the times given in Paragraph 1.E., Compliance. If no crack is found, repeat detailed inspections for cracks at the times given in Paragraph 1.E., Compliance.

EFFECTIVITY 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F, 747SP, 747SR Airplanes in eight groups. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplane(s).

COMPLIANCE The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory.

Federal Aviation Administration (FAA) Airworthiness Directive AD 90-06-14 R1 is related to this service bulletin.

The effective date of AD 90-06-14 R1 is April 24, 1990.

Federal Aviation Administration (FAA) Airworthiness Directive AD 2001-14-18 is related to this service bulletin.

The effective date of AD 2001-14-18 is August 30, 2001.

Refer to Paragraph 1.E., Compliance.

INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspections given in this service bulletin.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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MANPOWER Refer to Paragraph 1.G., Manpower.

MATERIAL INFORMATION Operator Supplied Parts/Materials.

Refer to Paragraph 2.A., Material - Price and Availability.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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Page 8OCROpen in PDF

BOEING SERVICE BULLETIN 747-53A2887

ALERT ALERT STA 250 STA 280 STA STA 300 STA STA CANTED STA 260 340 RBL 10~ RBL 22 320 340 LBL 10~ LBL 22~ GROUP 2, 3, 5, 6

DO A DETAILED INSPECTION

OF THE VERTICAL BEAMS

VERTICAL BEAM CLIPS, MAIN

DECK FLOOR BEAMS AND THE STIFFENERS FOR CRACKS.

IF ANY CRACK IS FOUND, DO A

DETAILED INSPECTION OF

ADJACENT STRUCTURE TO

DETERMINE THE FULL EXTENT

OF THE DAMAGE, CONTACT

BOEING FOR REPAIR INSTRUCTIONS AND

DO THE REPAIR, THEN REPEAT DETAILED

INSPECTIONS FOR CRACKS AT THE TIMES GIVEN IN PARAGRAPH 1.E., COMPLIANCE. IF NO CRACK IS FOUND,

REPEAT DETAILED INSPECTIONS FOR

CRACKS AT THE TIMES GIVEN IN PARAGRAPH 1.E., COMPLIANCE GROUP 1, 4

DO THE MODIFICATION IN ACCORDANCE WITH SERVICE BULLETIN LEFT SIDE SHOWN (SB) 747-53A2293 AT THE TIMES GIVEN IN PARAGRAPH 1.E., RIGHT SIDE OPPOSITE COMPLIANCE OF THIS SERVICE BULLETIN. IF THE MODIFICATION

WORK HAS BEEN DONE IN ACCORDANCE WITH SERVICE BULLETIN 747-53A2293, NO FURTHER MODIFICATION WORK IS REQUIRED. DO A

DETAILED INSPECTION OF THE VERTICAL BEAMS, VERTICAL BEAM

CLIPS, MAIN DECK FLOOR BEAMS AND THE FORE AFT STIFFENERS

FOR CRACKS A SURFACE OR OPEN HOLE HIGH FREQUENCY

EDDY CURREI SPECTION OF THE VERTICAL BEAMS OUTER CHORD, RACKS. IF ANY CRACK IS FOUND, DO A

DETAILED INSPE I OF ADJACENT STRUCTURE TO DETERMINE

THE FU IF THE DAMAGE, CONTACT BOEING FOR REPAIR

INSTRUC DO THE REPAIR, THEN REPEAT DETAILED

INSPEC OR OPEN HOLE HFEC INSPECTIONS AT THE TIMES GIVEN IN PARAGRAPH 1.E., COMPLIANCE. IF NO CRACK IS FOUND, REPEAT DETAILED INSPECTION AND SURFACE OR OPEN HOLE HFEC INSPECTIONS AT THE TIMES GIVEN IN PARAGRAPH 1.E., 2429723 COMPLIANCE.

Original Issue: December 02, 2015 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 747-53A2887 Work - See page 1 for detalls. 8 of 85

Commercial Airplanes 747 Service Bulletin ALERT Number: 747-53A2887 Original Issue: December 02, 2015 ATA System: 5315 SUBJECT: FUSELAGE - Nose Wheel Well - Body Structure Reinforcement Modification and Inspection

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 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F, 747SP, and 747SR airplanes, line numbers 1-1419, in six Groups. The Variable Numbers and Group Information for the applicable airplanes is given below.

DESCRIPTIONCONFIGURATIONGROUP 747-100, -100B, -100B SUD, -200B, -300, 747SP and 747SR airplanes, line numbers 1-685.

-1 747-100, -100B, -100B SUD, -200B, -300, 747SP and 747SR airplanes, line numbers 1-685, which have reinforcing straps installed in accordance with 747-53-2272.

1 747-100, -100B, -100B SUD, -200B, -300, 747SP and 747SR airplanes, line numbers 1-685, which don't have reinforcing straps installed in accordance with 747-53-2272.

2 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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DESCRIPTIONCONFIGURATIONGROUP 747-300 airplanes, line numbers 686-695.-2 747-300 airplanes, line numbers 686-695 with reinforcing straps installed in accordance with 747-53-2272.

1 747-300 airplanes, line numbers 686-695 without reinforcing straps installed in accordance with 747-53-2272.

2 747-200B, -300, -400, and -400D airplanes, line numbers 696-1419.-3 747-200C and -200F airplanes, line numbers 1-685.-4 747-200C, -200F, and -400F airplanes, line numbers 696-1419.-5 747-200F airplanes, line numbers 686-695.-6 Airplane Models:

747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SP, 747SR GroupVariable Number 1RA001 - RA034 1RA101 - RA115 1RA161 - RA164 1RA201 - RA203 1RA216 - RA217 1RA245 - RA246 1RA251 - RA266 1RA301 - RA318 1RA351 - RA360 1RA369 - RA373 1RA401 - RA418 1RA501 - RA502 1RA521 - RA528 1RA532 - RA548 1RA551 - RA552 1RA559 - RA561 1RA581 - RA582 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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GroupVariable Number 1RA585 1RA601 - RA602 1RA631 - RA635 1RA651 - RA652 1RA671 - RA677 1RA701 - RA702 1RA721 - RA731 1RA741 - RA745 1RA749 - RA750 1RA761 - RA762 1RA781 - RA784 1RA901 - RA916 1RB001 - RB016 1RB041 - RB044 1RB071 - RB075 1RB101 - RB102 1RB411 - RB412 3RB413 3RB421 1RB601 - RB607 1RB681 - RB697 1RB711 1RB721 - RB723 1RB741 - RB748 1RD001 - RD004 1RD021 - RD022 1RD041 - RD059 1RD071 - RD072 1RD081 - RD083 1RD091 - RD092 1RD101 - RD104 1RD121 - RD127 1RD131 - RD144 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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GroupVariable Number 1RD166 - RD167 1RD171 - RD172 1RD181 - RD183 1RD201 - RD204 1RD221 - RD227 1RD231 - RD234 3RD235 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 1RD461 1RD471 - RD475 1RD513 - RD519 1RD531 - RD533 1RD551 1RD561 1RD571 1RD581 - RD583 1RD591 - RD593 1RD601 - RD607 1RD621 - RD623 1RD641 - RD649 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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