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Commercial Airplanes 737 Service Bulletin Number: 737-27-1300 Original Issue: April 16, 2012 ATA System: 2731 SUBJECT: FLIGHT CONTROLS - Elevator and Tab - Elevator Tab Control Mechanism - Aft Attach Lug Modification 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 © 2012 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Unpublished Work.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, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, 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. BOEING is a trademark of Boeing Management Company.
Original Issue: April 16, 2012 737-27-1300 1 of 59
4.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 16, 2012 737-27-1300 2 of 59 BOEING SERVICE BULLETIN 737-27-1300
BLANK PAGE
Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected ........................................ 2 2 B. Concurrent Requirements ...................................... 2 2 C. Reason ................................................ 2 2 D. Description .............................................. 2 3 E. Compliance .............................................. 2 3 F. Approval ............................................... 2 4 G. Manpower .............................................. 2 4 H. Weight and Balance Changes .................................... 2 5 I. Electrical Load Data ......................................... 2 5 J. References .............................................. 2 5
1. Existing Data: ......................................... 2 5
2. Data Supplied with this Service Bulletin: ........................... 2 6
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 2 6 K. Publications Affected ........................................ 2 6 L. Interchangeability and Intermixability of Parts ........................... 2 7 M. Software Accomplishment Summary ................................ 2 7
2. MATERIAL INFORMATION ........................................ 2 9 A. Material - Price and Availability ................................... 2 9 B. Industry Support Information .................................... 2 9 C. Parts Necessary for Each Airplane ................................. 2 9
1. Kits/Parts ............................................ 2 9
2. Parts and Materials Supplied by the Operator ........................ 3 2
3. Parts Modified and Reidentified ................................ 3 3
4. Parts Removed and Not Replaced .............................. 3 3 D. Parts Necessary to Change Spares ................................. 3 3 E. Special Tooling - Price and Availability ............................... 3 3 F. Special Tooling Necessary to do this Service Bulletin ....................... 3 4
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 3 5 A. GENERAL INFORMATION ..................................... 3 5 B. WORK INSTRUCTIONS ....................................... 3 6 FIGURE 1: RIGHT SIDE, ELEVATOR TAB CONTROL MECHANISM MODIFICATION ........ 4 2 FIGURE 2: LEFT SIDE, ELEVATOR TAB CONTROL MECHANISM MODIFICATION ......... 4 9 FIGURE 3: RIGHT SIDE, ELEVATOR TAB CONTROL MECHANISM INSTALLATION ........ 5 6 FIGURE 4: LEFT SIDE, ELEVATOR TAB CONTROL MECHANISM INSTALLATION ......... 5 8 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 16, 2012 737-27-1300 3 of 59 BOEING SERVICE BULLETIN 737-27-1300
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 16, 2012 737-27-1300 4 of 59 BOEING SERVICE BULLETIN 737-27-1300
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Commercial Airplanes 737 Service Bulletin SummaryNumber: 737-27-1300Original Issue: April 16, 2012 ATA System: 2731 SUBJECT: FLIGHT CONTROLS - Elevator and Tab - Elevator Tab Control Mechanism - Aft Attach Lug Modification
CONCURRENT REQUIREMENTS None.
BACKGROUND Boeing has received 2 reports from operators where the failure of the aft attach lugs on the left elevator tab control mechanism resulted in unwanted elevator freeplay vibration during flight. Investigation revealed that the bearings installed in the elevator tab control mechanism aft attach lugs were likely installed such that they may become loose and migrate. This service bulletin installs a new or modified elevator tab control mechanism with a new improved machined lug with a new bearing that has an improved retention swage. A secondary retention feature was also added to the lug assemblies to ensure the bearings remain in the load path in the event of a swage failure. This new improved machined lug is more robust than the original and will increase the service life of the lugs and bearings of the elevator tab control mechanism. A loose bearing in the aft attach lug of the elevator tab control mechanism that is allowed to migrate out of the load path could lead to unwanted elevator freeplay and then tab vibration which could lead to structural failure of the elevator or the horizontal stabilizer, which can result in unsafe flight conditions.
The related Elevator Tab service bulletins are 737-27A1299 and 737-27A1297.
Boeing Service Related Problem (SRP) 737NG-SRP-27-0211 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.F., ApprovalYesAD Related Paragraph 1.H., Weight and Balance ChangesYesWeight 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 Paragraph 2.C.1., Kits/PartsYesKits/Parts Required Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 16, 2012 737-27-1300 5 of 59
ReferenceAffectedPlanning Data Paragraph 2.C.2., Parts and Materials Supplied by the Operator YesOperator Supplied Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin YesSpecial Tooling Required ACTION (PRR 38964) Airplane Work
1. Gain access to the elevator tab control mechanism. Remove and replace with a new or previously modified elevator tab control mechanism or remove and modify the elevator tab control mechanism by installing the new machined lug assemblies to the existing frames and applying the part mark, as indicated under Component Work. Perform functional tests, a power-off (manual reversion) flight test and return the airplane to a serviceable condition.
Component Work
1. Disassemble the elevator tab control mechanism and remove the lugs (bracket) from the frame.
2. Replace the sheet metal lug assemblies with the new machined lug assemblies.
3. Reassemble the elevator tab control mechanism and part mark with the new dash number.
EFFECTIVITY 737-600, -700, -700C, -800, -900 and -900ER Airplane(s). Refer to Paragraph 1.A., Effectivity, Airplanes, for the list of affected airplanes.
COMPLIANCE Federal Aviation Administration (FAA) Airworthiness Directive AD 2010-17-19 is related to this service bulletin.
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 airplanes in warranty as of March 11, 2010. Please refer to Paragraph
2.B., Industry Support Information.
MANPOWER Refer to Paragraph 1.G., Manpower.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 16, 2012 737-27-1300 6 of 59 BOEING SERVICE BULLETIN 737-27-1300
Elapsed HoursTotal Task HoursAirplanes
11.0012.00TOTAL FOR
EACH IN-
STALLED ELE-
VATOR TAB
CONTROL
MECHANISM
6.006.00TOTAL FOR
SPARE COMPO-
NENT - ELEVA-
TOR TAB CON-
TROL MECHA- NISM
MATERIAL INFORMATION Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 16, 2012 737-27-1300 7 of 59 BOEING SERVICE BULLETIN 737-27-1300
BOEING SERVICE BULLETIN 737-27-1300
REMOVE AND REPLACE EACH
ELEVATOR TAB CONTROL MECHANISM
OR MODIFY THEM BY REMOVING EACH
OLD SHEET METAL LUG ASSEMBLY AND
NSTALLING A NEW MACHINED LUG
ASSEMBLY FOR THE LEFT AND RIGHT LUG ASSEMBLIES ON EACH MECHANISM.
LEFT SIDE SHOWN, RIGHT SIDE SIMILAR 2107054 Original Issue: April 16, 2012 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 737-27-1300 Work - See page 1 for details. 8 of 59
Commercial Airplanes 737 Service Bulletin Number: 737-27-1300 Original Issue: April 16, 2012 ATA System: 2731 SUBJECT: FLIGHT CONTROLS - Elevator and Tab - Elevator Tab Control Mechanism - Aft Attach Lug Modification
1. PLANNING INFORMATION A. Effectivity
1. Airplanes
DESCRIPTIONCONFIGURATIONGROUP Line numbers 1 through 3909-1 Airplane Models:
737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER GroupVariable Number 1YA001 - YA099 1YA101 - YA199 1YA201 - YA211 1YA221 1YA231 - YA242 1YA251 - YA256 1YA271 - YA272 1YA291 1YA301 - YA302 1YA311 - YA314 1YA321 - YA323 1YA336 - YA345 1YA351 1YA356 - YA357 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1YA366 - YA367 1YA371 - YA377 1YA501 - YA536 1YA541 - YA552 1YA571 - YA578 1YA601 - YA615 1YA621 - YA622 1YA626 - YA631 1YA635 - YA636 1YA641 - YA642 1YA645 - YA650 1YA656 - YA659 1YA666 - YA667 1YA671 - YA672 1YA681 - YA691 1YA701 - YA710 1YA721 - YA722 1YA731 - YA734 1YA751 - YA756 1YA801 - YA803 1YA809 1YA811 - YA814 1YA831 - YA835 1YA841 - YA862 1YA881 - YA882 1YA891 - YA892 1YA961 - YA978 1YB001 - YB006 1YB101 - YB132 1YB151 - YB153 1YB156 - YB158 1YB161 - YB164 1YB171 - YB172 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1YB181 - YB184 1YB201 - YB208 1YB271 1YB276 1YB301 - YB310 1YB371 - YB392 1YB501 - YB502 1YB521 - YB526 1YB541 - YB544 1YB551 1YB561 - YB598 1YB601 - YB635 1YB651 1YB656 1YB671 - YB672 1YB851 - YB863 1YB871 - YB874 1YB881 - YB893 1YB901 - YB903 1YB911 1YB961 - YB975 1YB981 1YB986 - YB998 1YC001 - YC030 1YC051 - YC084 1YC091 - YC095 1YC101 - YC104 1YC111 - YC113 1YC121 1YC126 - YC127 1YC136 - YC141 1YC146 - YC147 1YC151 - YC156 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1YC166 - YC171 1YC176 - YC179 1YC186 - YC190 1YC201 - YC203 1YC206 - YC207 1YC301 - YC305 1YC321 - YC387 1YC391 - YC394 1YC396 1YC401 - YC417 1YC421 - YC422 1YC426 - YC428 1YC436 - YC439 1YC441 - YC448 1YC451 - YC455 1YC459 1YC461 - YC467 1YC471 - YC499 1YC501 - YC526 1YC571 - YC583 1YC587 - YC589 1YC591 - YC593 1YC601 - YC655 1YC681 - YC696 1YC701 - YC715 1YC720 - YC725 1YC727 - YC752 1YC761 - YC770 1YC781 - YC793 1YC801 - YC892 1YC901 - YC907 1YC921 - YC922 1YC931 - YC932 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 16, 2012 737-27-1300 12 of 59 BOEING SERVICE BULLETIN 737-27-1300