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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-55A1097 Original Issue: July 01, 2015 Revision 1: September 20, 2017 ATA System: 5510 SUBJECT: STABILIZERS - Horizontal Stabilizer - Rear Spar Upper Chord 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Unpublished Work.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: July 01, 2015 737-55A1097Revision 1: September 20, 2017 1 of 101
4.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097Revision 1: September 20, 2017 2 of 101 BOEING SERVICE BULLETIN 737-55A1097
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BLANK PAGE
Table of Contents
Revision Transmittal Sheet5
S u m m a r y7
1. PLANNING INFORMATION ........................................ 1 1 A . E f f e c t i v i t y ............................................... 1 1
1. Airplanes ............................................ 1 1 2 . S p a r e s A f f e c t e d ........................................ 3 6 B. Concurrent Requirements ...................................... 3 6 C. Reason ................................................ 3 6 D. Description .............................................. 3 7 E. Compliance .............................................. 3 7 F . A p p r o v a l ............................................... 5 0 G. Manpower .............................................. 5 1 H. Weight and Balance Changes .................................... 5 2 I. Electrical Load Data ......................................... 5 2 J . R e f e r e n c e s .............................................. 5 2
1. Existing Data: ......................................... 5 2
2. Data Supplied with this Service Bulletin: ........................... 5 3
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 5 3 K. Publications Affected ........................................ 5 3 L. Interchangeability and Intermixability of Parts ........................... 5 3 M. Software Accomplishment Summary ................................ 5 3
2. MATERIAL INFORMATION ........................................ 5 5 A. Material - Price and Availability ................................... 5 5 B. Industry Support Information .................................... 5 5 C. Parts Necessary for Each Airplane ................................. 5 5 1 . K i t s / P a r t s ............................................ 5 5
2. Parts and Materials Supplied by the Operator ........................ 5 5
3. Parts Modified and Reidentified ................................ 5 5
4. Parts Removed and Not Replaced .............................. 5 5 D. Parts Necessary to Change Spares ................................. 5 5 E. Special Tooling - Price and Availability ............................... 5 5 F. Special Tooling Necessary to do this Service Bulletin ....................... 5 5
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 5 7 A. GENERAL INFORMATION ..................................... 5 7 B. WORK INSTRUCTIONS ....................................... 5 8 FIGURE 1: LEFT SIDE HORIZONTAL STABILIZER IDENTIFICATION PLATE INSPECTION ..... 6 4 FIGURE 2: RIGHT SIDE HORIZONTAL STABILIZER IDENTIFICATION PLATE INSPECTION .... 6 7 FIGURE 3: LEFT SIDE HORIZONTAL STABILIZER REAR SPAR UPPER CHORD - HFEC INSPECTION TO DETECT ANY CRACK 0.100 INCH OR GREATER USING A 0.050 INCH SCAN INCREMENT .................................................. 7 0 FIGURE 4: RIGHT SIDE HORIZONTAL STABILIZER REAR SPAR UPPER CHORD - HFEC INSPECTION TO DETECT ANY CRACK 0.100 INCH OR GREATER USING A 0.050 INCH SCAN INCREMENT .................................................. 7 3 FIGURE 5: LEFT SIDE HORIZONTAL STABILIZER REAR SPAR UPPER CHORD - HFEC INSPECTION TO DETECT ANY CRACK 0.200 INCH OR GREATER USING A 0.100 INCH SCAN INCREMENT .................................................. 7 6 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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FIGURE 6: RIGHT SIDE HORIZONTAL STABILIZER REAR SPAR UPPER CHORD - HFEC INSPECTION TO DETECT ANY CRACK 0.200 INCH OR GREATER USING A 0.100 INCH SCAN INCREMENT .................................................. 7 9 APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 1: HORIZONTAL STABILIZER IDENTIFICATION [Group 1, Configuration 1] ................. 8 2 APPENDIX B: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 2: HORIZONTAL STABILIZER IDENTIFICATION [Group 1, Configuration 2] ................. 8 7 APPENDIX C: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 3: HORIZONTAL STABILIZER IDENTIFICATION [Group 2, Configuration 1] ................. 9 2 APPENDIX D: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 4: HORIZONTAL STABILIZER IDENTIFICATION [Group 2, Configuration 2] ................. 9 7 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097Revision 1: September 20, 2017 4 of 101 BOEING SERVICE BULLETIN 737-55A1097
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Commercial Airplanes 737 Service Bulletin ALERT Revision Transmittal SheetNumber: 737-55A1097Original Issue: July 01, 2015 Revision 1: September 20, 2017 ATA System: 5510 SUBJECT: STABILIZERS - Horizontal Stabilizer - Rear Spar Upper Chord Inspection This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Airworthiness Directive AD 2016-13-16 is related to this service bulletin.
Effects of this Revision on airplanes on which Original Issue was previously done and the horizontal stabilizers were determined to be not affected:
ActionConditionGroup Determine if any horizontal stabilizer is affected by this bulletin and do the required inspections and related corrective actions.
Airplane horizontal stabilizers determined not to be affected by the original issue of this service bulletin.
Group 1-2, Configuration 2
REASON FOR REVISION Revision 1 is sent to clarify the areas of inspection and serial number information and to make sure that operators who have previously determined their horizontal stabilizer not to be affected by the original issue of this service bulletin, determine again if any horizontal stabilizer is affected by this bulletin and do the required inspections and related corrective actions.
These sections were changed:
1. Summary, Background; revised the serial number information to more accurately describe the affected serial numbers.
2. Summary, Compliance; added new airworthiness directive.
3. Summary, Industry Support Information; revised the warranty statement.
4. Summary, Illustration; revised to more accurately express the area of work.
5. Paragraph 1.A.2., Spares Affected; revised the serial number information to more accurately describe the affected serial numbers.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097Revision 1: September 20, 2017 5 of 101
6. Paragraph 1.C., Reason; revised the serial number information to more accurately describe the affected serial numbers, included the reason for revision paragraph, and included the paragraph stating that IN01 was incorporated into this revision.
7. Paragraph 1.D., Description; included the effects of this revision paragraph.
8. Paragraph 1.E., Compliance; added new airworthiness directive, revised the compliance times to the effective date of the airworthiness directive and revised the serial number information to more accurately describe the affected serial numbers. Added new compliance tables for airplanes that completed the original issue of this service bulletin.
9. Paragraph 1.F., Approval; revised the approval paragraphs and added an AMOC paragraph for the new airworthiness directive.
10. Paragraph 1.J., References; added the new airworthiness directive.
11. Paragraph 2.B., Industry Support Information; revised the warranty statement.
12. Paragraph 3.B., Work Instructions; revised the serial number information to more accurately describe the affected serial numbers.
13. Figures 1-2; revised the illustrations to clarify the area of work and revised the serial number information to more accurately describe the affected serial numbers.
14. Figures 3-6; revised the illustrations to clarify the area of work.
15. Appendices B and D added for airplanes that completed the original issue of this service bulletin.
Appendix A and C; revised to incorporate changes made in Paragraph 1.E., Compliance and add flagnote tables.
The data given in Information Notice 737-55A1097 IN 01 is included in this revision.
Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity and format changes, to show the location of all content changes.
Pages with no vertical lines have no changes.
REVISION HISTORY July 01, 2015Original Issue:
September 20, 2017Revision 1:
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097Revision 1: September 20, 2017 6 of 101 BOEING SERVICE BULLETIN 737-55A1097
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Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-55A1097Original Issue: July 01, 2015 Revision 1: September 20, 2017 ATA System: 5510 SUBJECT: STABILIZERS - Horizontal Stabilizer - Rear Spar Upper Chord 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.
CONCURRENT REQUIREMENTS None.
BACKGROUND This service bulletin gives instructions to inspect for cracking in the horizontal stabilizer rear spar upper chord on horizontal stabilizers with affected serial numbers. If the work in this service bulletin is not done, corrosion damage may lead to cracking in the horizontal stabilizer rear spar upper chord. Fracture of the upper chord of the horizontal stabilizer will compromise the structural integrity which could lead to departure of the horizontal stabilizer from the airplane. This will lead to loss of continued safe flight and landing.
Due to a manufacturing oversight, discovered after production of the affected stabilizers, supplier SAMC (Shanghai Aviation Manufacturing Corporation, formally SAIC, Shanghai Aviation Industrial Corporation) omitted the required protective finish (zinc-nickel alloy plate or cadmium plate) on the 182A1508-4/-5/-6 bushings (in line with the terminal fitting holes) installed in the rear spar upper chord on horizontal stabilizers with the following serial numbers:
Serial Number (a)Manufacturer (MFR) Code 1 to 143, 145 to 625, 627 to 1144, 1146 to 1601SAIC 1602 to 2639SAMC
(a) Horizontal stabilizer serial numbers may or may not have leading zeroes. In addition, all horizontal stabilizer serial numbers can start with the MFR code.
The 182A1508-4/-5/-6 bushings are made from aluminum-nickel-bronze. When these bushings are installed, without the required protective finish, into the 2024-T3511 aluminum horizontal stabilizer rear spar upper chord, this can lead to galvanic corrosion between the dissimilar metals. This corrosion can lead to cracking of the rear spar upper chord, which can result in the failure of the upper chord.
Boeing Fleet Team Digest (FTD) 737NG FTD 55-14001 is related to this service bulletin.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097Revision 1: September 20, 2017 7 of 101
Boeing Service Related Problem (SRP) 737NG-SRP-55-0056 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 AffectedYesSpares 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 AffectedYesPublications 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 To determine if the left and right horizontal stabilizers are affected, do one of the following:
- OPTION 1: Do a check of delivery and maintenance records to find the serial number of the horizontal stabilizer installed on the airplane during production and to determine if the horizontal stabilizer has been exchanged.
- OPTION 2: Gain access to the horizontal stabilizer identification plate and do an inspection of the identification plate to find the serial numbers of the horizontal stabilizers.
If any affected horizontal stabilizer is installed on the airplane, do one of the following:
- OPTION 1 (TO DETECT ANY CRACK 0.100 INCH OR GREATER): Do a High Frequency Eddy Current (HFEC) inspection of the horizontal stabilizer rear spar upper chord for any crack using a 0.050 inch scan increment.
- OPTION 2 (TO DETECT ANY CRACK 0.200 INCH OR GREATER): Do an HFEC inspection of the horizontal stabilizer rear spar upper chord for any crack using a 0.100 inch scan increment.
If no crack is found, repeat the OPTION 1 or OPTION 2 HFEC inspection at the repeat interval given in Paragraph
1.E., Compliance.
If any crack is found, contact Boeing to get instructions for the repair for this service bulletin, and do the work instructed by Boeing. Repeat the inspection for any crack at the unrepaired areas.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097Revision 1: September 20, 2017 8 of 101 BOEING SERVICE BULLETIN 737-55A1097
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EFFECTIVITY 737-600, -700, -700C, -800, -900, -900ER Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
Refer to Paragraph 1.A.2., Spares Affected for the list of affected components.
COMPLIANCE Federal Aviation Administration (FAA) Airworthiness Directive AD 2016-13-16 is related to this service bulletin.
The effective date of AD 2016-13-16 is August 12, 2016.
Refer to Paragraph 1.E., Compliance.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are available for 737 airplanes in warranty as of December 20, 2012. Refer to Paragraph 2.B., Industry Support Information.
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION None.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097Revision 1: September 20, 2017 9 of 101 BOEING SERVICE BULLETIN 737-55A1097
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BOEING SERVICE BULLETIN 737-55A1097
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INSPECT DO A HFEC INSPECTION OF THE
IDENTIFICATION HORIZONTAL STABILIZER REAR
PLATE SPAR UPPER CHORD FOR ANY CRACK 2389661 Original Issue: July 01, 2015 Revision 1: September 20, 2017 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 737-55A1097 Work - See page 1 for details. 10 of 101
Commercial Airplanes 737 Service Bulletin ALERT Number: 737-55A1097 Original Issue: July 01, 2015 Revision 1: September 20, 2017 ATA System: 5510 SUBJECT: STABILIZERS - Horizontal Stabilizer - Rear Spar Upper Chord 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.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes This service bulletin is applicable to 737-600, -700, -700C, -800, -900, -900ER airplanes in 2 Groups. The Variable Numbers and Group Information for the applicable airplanes is given below.
Refer to Service Bulletin Index D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
NOTE: The Variable Number table below includes all affected airplanes up to Line Number 7107.
Affected airplanes after Line Number 7107 will be added to the service bulletin's MyBoeingFleet.com (MBF) "get effectivity" result when they are added to the MBF Fleet Profile Page.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097Revision 1: September 20, 2017 11 of 101
DESCRIPTIONCONFIGURATIONGROUP 737-600, -700, -700C, -800, -900, -900ER airplanes, line numbers 379-1117, 1119-1782, 1784-2504, 2506-4484. These airplanes were possibly delivered with affected stabilizers installed.
-1 737-600, -700, -700C, -800, -900, -900ER airplanes, line numbers 379-1117, 1119-1782, 1784-2504, 2506-4484. These airplanes were possibly delivered with affected stabilizers installed, on which the original issue of this service bulletin was not previously done, or the original issue was done and it was determined the horizontal stabilizers are affected.
1 737-600, -700, -700C, -800, -900, -900ER airplanes, line numbers 379-1117, 1119-1782, 1784-2504, 2506-4484. These airplanes were possibly delivered with affected stabilizers installed, on which the original issue of this service bulletin was previously done and it was determined the horizontal stabilizers are not affected.
2 737-600, -700, -700C, -800, -900, -900ER airplanes, line numbers 1-378, 1118, 1783, 2505, 4485 and on. These airplanes were not delivered with any affected stabilizer installed.
-2 737-600, -700, -700C, -800, -900, -900ER airplanes, line numbers 1-378, 1118, 1783, 2505, 4485 and on. These airplanes were not delivered with any affected stabilizer installed, on which the original issue of this service bulletin was not previously done, or the original issue was done and it was determined the horizontal stabilizers are affected.
1 737-600, -700, -700C, -800, -900, -900ER airplanes, line numbers 1-378, 1118, 1783, 2505, 4485 and on. These airplanes were not delivered with any affected stabilizer installed, on which the original issue of this service bulletin was previously done and it was determined the horizontal stabilizers are not affected.
2 Airplane Models:
737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER GroupVariable Number 2YA001 - YA049 1YA050 - YA099 1YA101 - YA199 2YA201 - YA206 1YA207 - YA211 1YA221 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097Revision 1: September 20, 2017 12 of 101 BOEING SERVICE BULLETIN 737-55A1097