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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-55A1097 Original Issue: July 01, 2015 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Unpublished Work.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 737-55A1097 1 of 71
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Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097 2 of 71 BOEING SERVICE BULLETIN 737-55A1097
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BLANK PAGE
Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected31
B. Concurrent Requirements31
C. Reason31
D. Description32
E. Compliance32
F. Approval39
G. Manpower40
H. Weight and Balance Changes41
I. Electrical Load Data41
J. References41
1. Existing Data:41
2. Data Supplied with this Service Bulletin:42
3. Installation Drawings Used in the Preparation of this Service Bulletin:42
K. Publications Affected42
L. Interchangeability and Intermixability of Parts42
M. Software Accomplishment Summary42
2. MATERIAL INFORMATION43
A. Material - Price and Availability43
B. Industry Support Information43
C. Parts Necessary for Each Airplane43
1. Kits/Parts43
2. Parts and Materials Supplied by the Operator43
3. Parts Modified and Reidentified43
4. Parts Removed and Not Replaced43
D. Parts Necessary to Change Spares43
E. Special Tooling - Price and Availability43
F. Special Tooling Necessary to do this Service Bulletin43
3. ACCOMPLISHMENT INSTRUCTIONS45
A. GENERAL INFORMATION45
B. WORK INSTRUCTIONS46
FIGURE 1: LEFT SIDE HORIZONTAL STABILIZER IDENTIFICATION PLATE INSPECTION52
FIGURE 2: RIGHT SIDE HORIZONTAL STABILIZER IDENTIFICATION PLATE INSPECTION54
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
.56
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
.58
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
.60
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
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APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 1: HORIZONTAL
STABILIZER IDENTIFICATION64
APPENDIX B: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 2: HORIZONTAL
STABILIZER IDENTIFICATION68
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097 4 of 71 BOEING SERVICE BULLETIN 737-55A1097
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Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-55A1097Original Issue: July 01, 2015 ATA System: 5510 SUBJECT: STABILIZERS - Horizontal Stabilizer - Rear Spar Upper Chord 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 inspect for cracking in the horizontal stabilizer rear spar upper chord on horizontal stabilizers with serial numbers SAIC0001-SAIC0143, SAIC0145-SAIC0625, SAIC0627-SAIC1144, SAIC1146-SAIC1601, and SAMC1602-SAMC2639. 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, 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 serial numbers SAIC0001-SAIC0143, SAIC0145-SAIC0625, SAIC0627-SAIC1144, SAIC1146-SAIC1601, and SAMC1602-SAMC2639. This issue was discovered after production of the affected stabilizers.
The 182A1508-4/-5/-6 bushings are made from aluminum-nickel-bronze. When these bushings are installed 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.
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.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097 5 of 71
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.
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.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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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.
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. The warranty remedies will expire eight years from the original issue date of this service bulletin.
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 737-55A1097 7 of 71 BOEING SERVICE BULLETIN 737-55A1097
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BOEING SERVICE BULLETIN 737-55A1097
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DO AN HFEC INSPECTION OF THE
HORIZONTAL STABILIZER REAR SPAR
UPPER CHORD FOR ANY CRACK
INSPECT IDENTIFICATION PLATE 2389661 Original Issue: July 01, 2015 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 737-55A1097 Work - See page 1 for details. 8 of 71
Commercial Airplanes 737 Service Bulletin ALERT Number: 737-55A1097 Original Issue: July 01, 2015 ATA System: 5510 SUBJECT: STABILIZERS - Horizontal Stabilizer - Rear Spar Upper Chord 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 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 6060.
Affected airplanes after Line Number 6060 will be added to the service bulletin's MyBoeingFleet.com (MBF) "get effectivity" result when they are added to the MBF Fleet Profile Page.
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 1-378, 1118, 1783, 2505, 4485 and on. These airplanes were not delivered with any affected stabilizer installed.
-2 Airplane Models:
737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 01, 2015 737-55A1097 9 of 71
GroupVariable Number 2YA001 - YA049 1YA050 - YA099 1YA101 - YA199 2YA201 - YA206 1YA207 - YA211 1YA221 2YA231 - YA242 2YA251 - YA254 1YA255 - YA256 2YA271 - YA272 2YA291 2YA301 - YA302 2YA311 - YA314 2YA321 - YA322 1YA323 1YA336 - YA345 1YA351 1YA356 - YA357 1YA366 - YA367 1YA371 - YA377 2YA501 - YA535 1YA536 2YA541 - YA546 1YA547 - YA552 2YA571 - YA577 1YA578 2YA601 - YA608 1YA609 - YA615 1YA621 - YA622 1YA626 - YA631 1YA635 - YA636 1YA641 - YA642 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1YA645 - YA650 1YA656 - YA659 1YA666 - YA667 1YA671 - YA672 1YA681 - YA691 2YA701 - YA704 1YA705 - YA710 2YA721 - YA722 2YA731 1YA732 - YA734 2YA751 - YA756 1YA801 - YA803 1YA809 2YA811 - YA814 2YA831 - YA832 1YA833 - YA835 2YA841 - YA842 1YA843 - YA862 2YA881 1YA882 1YA891 - YA892 1YA961 - YA978 1YB001 - YB006 1YB101 - YB112 2YB113 1YB114 - YB132 1YB151 - YB153 1YB156 - YB158 1YB161 - YB164 1YB171 - YB172 1YB181 - YB184 1YB201 - YB208 1YB271 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1YB276 1YB301 - YB310 1YB371 - YB392 1YB501 - YB502 1YB521 - YB526 1YB541 - YB544 1YB551 1YB561 - YB598 1YB601 - YB636 1YB651 1YB656 1YB671 - YB672 1YB851 - YB863 1YB871 - YB874 1YB881 - YB893 1YB901 - YB903 1YB911 1YB961 - YB975 1YB981 1YB986 - YB998 2YC001 - YC011 1YC012 - YC030 2YC051 - YC058 1YC059 - YC070 2YC071 - YC076 1YC077 - YC084 1YC091 - YC095 2YC101 - YC103 1YC104 2YC111 - YC112 1YC113 2YC121 2YC126 - YC127 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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