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Commercial Airplanes 757 Service Bulletin ALERT Number: 757-27A0144 Original Issue: August 07, 2003 Revision 1: January 20, 2010 ATA System: 2741 SUBJECT: FLIGHT CONTROLS - Horizontal Stabilizer - Horizontal Stabilizer Trim Actuator - Ballscrew Freeplay Check Addition and Lubrication Interval Change Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 730-774). 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2003 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter. Boeing also claims copyright in this document as a compilation and/or collective work.
This document includes proprietary information owned by The Boeing Company and/or one or more third parties.
Treatment of the document and the information it contains is governed by contract with Boeing. For more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124.
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 the Boeing livery 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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 07, 2003 757-27A0144Revision 1: January 20, 2010 1 of 29
2.0
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 07, 2003 757-27A0144Revision 1: January 20, 2010 2 of 29 BOEING SERVICE BULLETIN 757-27A0144
ALERTALERT
BLANK PAGE
Table of Contents
Revision Transmittal Sheet5
Summary7
1. PLANNING INFORMATION ........................................ 1 1 A. Effectivity ............................................... 1 1
1. Airplanes ............................................ 1 1
2. Spares Affected ........................................ 1 5 B. Concurrent Requirements ...................................... 1 5 C. Reason ................................................ 1 5 D. Description .............................................. 1 6 E. Compliance .............................................. 1 7 F. Approval ............................................... 2 0 G. Manpower .............................................. 2 0 H. Weight and Balance Changes .................................... 2 0 I. Electrical Load Data ......................................... 2 0 J. References .............................................. 2 1
1. Existing Data: ......................................... 2 1
2. Data supplied with this Service Bulletin: ........................... 2 1
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 2 1 K. Publications Affected ........................................ 2 1 L. Interchangeability and Intermixability of Parts ........................... 2 1
2. MATERIAL INFORMATION ........................................ 2 3 A. Material - Price and Availability ................................... 2 3 B. Industry Support Information .................................... 2 3 C. Parts Necessary For Each Airplane ................................. 2 3
1. Kits/Parts: ........................................... 2 3
2. Parts and Materials Supplied by the Operator: ........................ 2 3
3. Parts Modified and Reidentified: ............................... 2 3
4. Parts Removed and Not Replaced: .............................. 2 3 D. Parts Necessary to Change Spares ................................. 2 3 E. Special Tooling - Price and Availability ............................... 2 3 F. Special Tooling Necessary to do this Service Bulletin ....................... 2 3
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 5 A. GENERAL INFORMATION ..................................... 2 5 B. WORK INSTRUCTIONS ....................................... 2 5 FIGURE 1: INSPECTION OF HORIZONTAL STABILIZER BALLSCREW LOAD PATH ........ 2 7 FIGURE 2: HORIZONTAL STABILIZER BALLSCREW AND BALLNUT FREEPLAY CHECK ..... 2 8 FIGURE 3: HORIZONTAL STABILIZER TRIM BALLSCREW ACTUATOR REPLACEMENT ..... 2 9
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 07, 2003 757-27A0144Revision 1: January 20, 2010 3 of 29 BOEING SERVICE BULLETIN 757-27A0144
ALERTALERT
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 07, 2003 757-27A0144Revision 1: January 20, 2010 4 of 29 BOEING SERVICE BULLETIN 757-27A0144
ALERTALERT
BLANK PAGE
Commercial Airplanes 757 Service Bulletin ALERT Revision Transmittal SheetNumber: 757-27A0144Original Issue: August 07, 2003 Revision 1: January 20, 2010 ATA System: 2741 SUBJECT: FLIGHT CONTROLS - Horizontal Stabilizer - Horizontal Stabilizer Trim Actuator - Ballscrew Freeplay Check Addition and Lubrication Interval Change This Revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION No more work is necessary on airplanes changed as shown in the original issue of this service bulletin. However, operators must continue to do the repeat detailed inspection, lubrication and freeplay check in accordance with Paragraph 1.E., Compliance.
REASON FOR REVISION This revision is sent to change the compliance times of the detailed inspection, lubrication and ballnut-to-ballscrew freeplay check. Instructions on how to accomplish the detailed inspection are replaced by an instruction to do the detailed inspection in accordance with the Aircraft Maintenance Manual (AMM) and Part 3 is added to the work instructions to give lubrication instructions. This revision also adds an Airworthiness Directive (AD) statement and removes all figures as the procedures are now accomplished by the AMM.
These sections are changed:
1. Summary:
– Background: A interim notification of a revision to the Maintenance Planning Document (MPD) statement is removed.
– Action: The statement is updated to agree with the updated work instructions.
– Compliance: An Airworthiness Directive (AD) statement is added.
– Manpower: The manpower table is removed.
– Illustration: The summary illustration paragraph is updated.
2. Planning Information:
– Paragraph 1.A., Effectivity: A group configuration table is added which splits the effectivity into 3 configurations.
– Paragraph 1.C., Reason: A interim notification of a revision to the Maintenance Planning Document (MPD) statement is removed.
– Paragraph 1.D., Description: The statement is updated to agree with the updated work instructions and maintenance zones are added.
– Paragraph 1.E., Compliance: An Airworthiness Directive (AD) statement is added.
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Original Issue: August 07, 2003 757-27A0144Revision 1: January 20, 2010 5 of 29
– Paragraph 1.E., Compliance: The compliance times and repeat intervals for the detailed inspection, lubrication and freeplay check in Tables 1 and 2 are changed. The corrective action for damaged parts is added, footnotes (a) and (b) are changed and footnote (c) is deleted.
– Paragraph 1.E., Compliance: The compliance times and repeat intervals for the detailed inspection, lubrication and freeplay check in Table 3 are changed. The corrective action for damaged parts is added, footnotes (a) and (b) are changed and footnotes (c) and (d) are deleted.
– Paragraph 1.G., Manpower: The manpower table is updated.
3. Accomplishment Instructions:
– Paragraph 3.B., Work Instructions: A note is deleted from Part 1, Step 1 and the access, cleaning, lubrication and detailed inspection instructions are replaced by one instruction to do a detailed inspection in accordance with the AMM.
– Paragraph 3.B., Work Instructions: The access instruction is removed from Part 2 and an AMM task is added to the instruction to do the stabilizer ballscrew to ballnut freeplay check.
– Paragraph 3.B., Work Instructions: Part 3 is added to give lubrication instructions.
– Figure 1: This Figure is deleted.
– Figure 2: This Figure is deleted.
– Figure 3: This Figure is deleted.
Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity, to show the location of important changes.
Pages with no vertical lines have no important changes.
REVISION HISTORY August 07, 2003Original Issue:
January 20, 2010Revision 1:
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 07, 2003 757-27A0144Revision 1: January 20, 2010 6 of 29 BOEING SERVICE BULLETIN 757-27A0144
ALERTALERT
Commercial Airplanes 757 Service Bulletin ALERT SummaryNumber: 757-27A0144Original Issue: August 07, 2003 Revision 1: January 20, 2010 ATA System: 2741 SUBJECT: FLIGHT CONTROLS - Horizontal Stabilizer - Horizontal Stabilizer Trim Actuator - Ballscrew Freeplay Check Addition and Lubrication Interval Change
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 is being issued to provide a new stabilizer ballscrew lubrication interval and detailed inspection interval. Also, a new stabilizer ballscrew to ballnut freeplay check is included with a recommended check interval.
The inspections/check are an added level of protection which reduces the potential of unlikely failure modes of the stabilizer ballscrew assembly used on the stabilizer actuator. The inspections/check can be run in-situ on the airplane After an MD-80 horizontal stabilizer jackscrew incident, a design review was initiated of the Boeing heritage horizontal stabilizer ballscrews. During this review, an operator reported a 757 horizontal stabilizer ballscrew with extensive corrosion. An investigation was initiated. This investigation identified that a maintenance procedure to check the stabilizer ballscrew primary load path was required. Loss of the horizontal stabilizer ballscrew primary and secondary load paths, although extremely improbable, could potentially result in the loss of control of the airplane.
Boeing Service Related Problem (SRP) 757-SRP-27-0153 is related to this service bulletin.
NOTE: Service Bulletin 757-27-0137 served as an interim maintenance action related to 757-SRP-27-0153.
Service Bulletin 757-27A0144 is the final maintenance recommendation related to 757-SRP-27-0153.
Upon release of Service Bulletin 757-27A0144, operators should perform the maintenance actions in that bulletin rather than those in Service Bulletin 757-27-0137. However, it should be noted that Service Bulletin 757-27-0137 includes one maintenance action that is not included in Service Bulletin 757-27A0144: lubrication of the stabilizer pivot hinges. Lubrication of the stabilizer pivot hinges was included in Service Bulletin 757-27-0137 as a convenience; it is unrelated to the safety issue addressed in safety 757-SRP-27-0153. Boeing recommends that operators continue to perform the stabilizer hinge lubrication task per 757 MPD Volume 1 Section 5, and 757 AMM 12-21-05.
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Original Issue: August 07, 2003 757-27A0144Revision 1: January 20, 2010 7 of 29
ACTION Get access to the horizontal stabilizer trim ballscrew actuator and do the procedures that follow below at the intervals shown in Paragraph 1.E., Compliance:
– Do a detailed inspection of the stabilizer ballscrew assembly.
– Lubricate the horizontal stabilizer trim control system.
– Do a stabilizer ballscrew to ballnut freeplay check.
– Replace damaged and/or cracked and/or worn stabilizer trim ballscrew actuators.
EFFECTIVITY All 757-200/-200CB/-200PF 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.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the tasks given in this service bulletin.
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Operator Supplied Parts/Materials.
Refer to Paragraph 2.A., Material - Price and Availability.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 07, 2003 757-27A0144Revision 1: January 20, 2010 8 of 29 BOEING SERVICE BULLETIN 757-27A0144
ALERTALERT
BOEING SERVICE BULLETIN 757-27A0144
ALERT ALERT STA 1768
DO A DETAILED INSPECTION OF THE STABILIZER BALLSCREW ASSEMBLY.
LUBRICATE THE HORIZONTAL
STABILIZER TRIM CONTROL SYSTEM
AND DO A STABILIZER BALLSCREW TO BALLNUT FREEPLAY CHECK.
SERVICE ACCESS DOOR (311AL) N87426 Original Issue: August 07, 2003 Revision 1: January 20, 2010 BOEING PROPRIETARY - 757-27A0144 Copyright © Unpublished Work - See page 1 for details. 9 of 29
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 07, 2003 757-27A0144Revision 1: January 20, 2010 10 of 29 BOEING SERVICE BULLETIN 757-27A0144
ALERTALERT
BLANK PAGE
Commercial Airplanes 757 Service Bulletin ALERT Number: 757-27A0144 Original Issue: August 07, 2003 Revision 1: January 20, 2010 ATA System: 2741 SUBJECT: FLIGHT CONTROLS - Horizontal Stabilizer - Horizontal Stabilizer Trim Actuator - Ballscrew Freeplay Check Addition and Lubrication Interval Change
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 Document D624N001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is for the airplanes shown below.
DESCRIPTIONCONFIGURATIONGROUP All 757-200, 200CB, -200PF airplanes.-1 Airplanes that have not done an overhaul of the stabilizer trim actuator in accordance with Service Bulletin 757-27A0142 and have less than or equal to 15,000 total flight hours.
1 Airplanes that have not done an overhaul of the stabilizer trim actuator in accordance with Service Bulletin 757-27A0142 and have more than 15,000 total flight hours.
2 Airplanes that have done an overhaul of the stabilizer trim actuator in accordance with Service Bulletin 757-27A0142.
3 Airplane Models:
757-200, 757-200CB, 757-200PF
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Original Issue: August 07, 2003 757-27A0144Revision 1: January 20, 2010 11 of 29
GroupVariable Number 1NA001 - NA028 1NA191 - NA199 1NA201 - NA239 1NA301 - NA305 1NA341 - NA352 1NA391 - NA399 1NA401 - NA408 1NA441 - NA447 1NA501 - NA586 1NB001 - NB004 1NB021 - NB023 1NB036 - NB041 1NB051 - NB053 1NB061 - NB073 1NB079 1NB131 - NB148 1NB161 - NB162 1NB166 - NB168 1NB201 - NB204 1NB221 - NB228 1NB230 1NB236 1NB239 1NB261 - NB267 1NB291 - NB299 1NB301 - NB302 1NB311 - NB312 1NB321 - NB331 1NB421 - NB438 1NB446 1NB451 - NB454 1NB501 - NB523
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Original Issue: August 07, 2003 757-27A0144Revision 1: January 20, 2010 12 of 29 BOEING SERVICE BULLETIN 757-27A0144