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Commercial Airplanes 757 Service Bulletin ALERT Number: 757-29A0066 Original Issue: January 02, 2007 Revision 1: March 08, 2010 ATA System: 2921 SUBJECT: HYDRAULIC POWER - Ram Air Turbine (RAT) System - RAT Hub Assembly Inspection and Replacement 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2007 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.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: January 02, 2007 757-29A0066Revision 1: March 08, 2010 1 of 26
3.0
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 02, 2007 757-29A0066Revision 1: March 08, 2010 2 of 26 BOEING SERVICE BULLETIN 757-29A0066
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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 6 F. Approval ............................................... 1 7 G. Manpower .............................................. 1 7 H. Weight and Balance Changes .................................... 1 7 I. Electrical Load Data ......................................... 1 8 J. References .............................................. 1 8
1. Existing Data: ......................................... 1 8
2. Data supplied with this Service Bulletin: ........................... 1 8
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 1 8 K. Publications Affected ........................................ 1 8 L. Interchangeability and Intermixability of Parts ........................... 1 8
2. MATERIAL INFORMATION ........................................ 1 9 A. Material - Price and Availability ................................... 1 9 B. Industry Support Information .................................... 1 9 C. Parts Necessary For Each Airplane ................................. 1 9
1. Kits/Parts: ........................................... 1 9
2. Parts and Materials Supplied by the Operator: ........................ 1 9
3. Parts Modified and Reidentified: ............................... 1 9
4. Parts Removed and Not Replaced: .............................. 1 9 D. Parts Necessary to Change Spares ................................. 1 9 E. Special Tooling - Price and Availability ............................... 1 9 F. Special Tooling Necessary to do this Service Bulletin ....................... 1 9
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 1 A. GENERAL INFORMATION ..................................... 2 1 B. WORK INSTRUCTIONS ....................................... 2 2 FIGURE 1: RAM AIR TURBINE (RAT) HUB ASSEMBLY REPLACEMENT ............... 2 4 Appendix A: FORM FOR OPERATOR FEEDBACK ............................ 2 6
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 02, 2007 757-29A0066Revision 1: March 08, 2010 3 of 26 BOEING SERVICE BULLETIN 757-29A0066
ALERTALERT
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 02, 2007 757-29A0066Revision 1: March 08, 2010 4 of 26 BOEING SERVICE BULLETIN 757-29A0066
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Commercial Airplanes 757 Service Bulletin ALERT Revision Transmittal SheetNumber: 757-29A0066Original Issue: January 02, 2007 Revision 1: March 08, 2010 ATA System: 2921 SUBJECT: HYDRAULIC POWER - Ram Air Turbine (RAT) System - RAT Hub Assembly Inspection and Replacement This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION No more work is necessary on airplanes changed in accordance with the original issue of this service bulletin.
Federal Aviation Administration (FAA) Notice of Proposed Rule Making 2007-NM-223-AD, is related to this service bulletin.
Airplanes NA001 thru NA028, NA191 thru NA199, NA201 thru NA239, NA301 thru NA302, NA304 thru NA305, NA341 thru NA352, NA391 thru NA399, NA401 thru NA408, NA441 thru NA447, NA501 thru NA560, NA565 thru NA586, NB001 thru NB004, NB021 thru NB023, NB036 thru NB041, NB051 thru NB053, NB061 thru NB073, NB131 thru NB140, NB143 thru NB148, NB161 thru NB162, NB166 thru NB168, NB201 thru NB204, NB221 thru NB228, NB230, NB236, NB239, NB261 thru NB267, NB291 thru NB299, NB301 thru NB302, NB311 thru NB312, NB321 thru NB331, NB421 thru NB438, NB446, NB451 thru NB454, NB501 thru NB523, NB561, NB571, NB581 thru NB583, NC001 thru NC033, NC041 thru NC042, NC051 thru NC052, NC056 thru NC062, NC066 thru NC084, NC091 thru NC094, NC151, NC161, NC901 thru NC915, NC921 thru NC950, NC971 thru NC972, ND001 thru ND003, ND005 thru ND007, ND011 thru ND025, ND041 thru ND059, ND111 thru ND113, ND161 thru ND199, ND201 thru ND203, ND221 thru ND225, ND241 thru ND248, ND301 thru ND322, ND401, ND891, ND895, NE001 thru NE002, NE004 thru NE008, NE011 thru NE023, NE039 thru NE088, NE091 thru NE094, NE141 thru NE150, NE161 thru NE177, NE202 thru NE204, NE301 thru NE302, NE311 thru NE325, NJ001 thru NJ004, NJ031 thru NJ032, NJ551 thru NJ555, NL001 thru NL002, NL006 thru NL017, NL101 thru NL109, NL141, NL601 thru NL616, NN001 thru NN002, NN051 thru NN052, NP901 thru NP904, NS601 thru NS616, NT001 thru NT009, NT201 thru NT202, NT231 thru NT234, NT237 thru NT240, NT242, NT245 thru NT248, NT281 thru NT289, NT341 thru NT347, NT351 thru NT360, NT371 thru NT373, NT375 thru NT379, NT381 thru NT386, NT401 thru NT409, NT411 thru NT412, NT426 thru NT427, NT431 thru NT432, NT436 thru NT438, NT441 thru NT442, NT446, NT701 thru NT769, NT791 thru NT796, NT861 thru NT862, NT881 thru NT885, NT901 thru NT916, NT971 thru NT985, NU031 thru NU038, NU701 thru NU705, NU721 thru NU728, and NU731 thru NU732 are added to Group 1 of the service bulletin effectivity.
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Original Issue: January 02, 2007 757-29A0066Revision 1: March 08, 2010 5 of 26
REASON FOR REVISION This revision is sent to add all 757 airplanes to the service bulletin effectivity. Since the release of the original issue of this service bulletin, it has been found that it is possible that some operators could have removed affected Ram Air Turbines (RAT) or RAT hub assemblies and installed them on other airplanes as they are interchangeable.
This revision also adds an FAA Notice of Proposed Rule Making (NPRM), removes a step from the Work Instructions and adds maintenance zone information. In addition to these changes, the term "as given in" is changed to "refer to, as an accepted procedure" for non-FAA approved manuals and "in accordance with" for FAA approved manuals to comply with the latest SB standards. Figure references are also updated to say "in accordance with" to comply with the latest SB standards.
These sections are changed:
1. Summary:
– Concurrent Requirements: Is changed to refer to Paragraph 1.B.
– Effectivity: 757-200CB and 757-300 airplanes are added to the effectivity paragraph.
– Compliance: Notice of Proposed Rule Making 2007-NM-223-AD is added.
– Manpower: The manpower table is removed.
2. Planning Information:
– Paragraph 1.A.1., Airplanes: The group configuration table is changed to add airplanes.
– Paragraph 1.B., Concurrent requirements: Hamilton Sundstrand SB 730814-29-12 is added to the concurrent requirements.
– Paragraph 1.D., Description: A maintenance zone table is added.
– Paragraph 1.E., Compliance: The compliance recommendation is changed and Notice of Proposed Rule Making 2007-NM-223-AD is added.
– Paragraph 1.G., Manpower: Footnote (a) is changed to clarify that the work necessary on each airplane is variable. The word 'required' is changed to 'necessary' in footnote (b).
– Paragraph 1.K., Publications Affected: A damage tolerance paragraph is added.
3. Accomplishment Instructions:
– Paragraph 3.B., Work Instructions: The original Step 4.b.3 is removed because installation of the new RAT hub assembly is already given in a previous step. The subsequent step numbers are adjusted.
– Figure 1: The title is updated to better describe the change.
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 January 02, 2007Original Issue:
March 08, 2010Revision 1:
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Original Issue: January 02, 2007 757-29A0066Revision 1: March 08, 2010 6 of 26 BOEING SERVICE BULLETIN 757-29A0066
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Commercial Airplanes 757 Service Bulletin ALERT SummaryNumber: 757-29A0066Original Issue: January 02, 2007 Revision 1: March 08, 2010 ATA System: 2921 SUBJECT: HYDRAULIC POWER - Ram Air Turbine (RAT) System - RAT Hub Assembly Inspection and Replacement
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 Refer to Paragraph 1.B., Concurrent Requirements.
BACKGROUND This service bulletin gives instructions to inspect and replace the Ram Air Turbine (RAT) hub assembly to prevent a possible fracture of the RAT hub assembly counterweight. A fractured RAT hub assembly counterweight will cause an overspeed condition which could result in turbine blade separation, airplane structural damage, possible injury to passengers, and result in an inoperative RAT. The RAT provides hydraulic power for the operation of the primary flight controls in cases where both engines are shut down in flight. If this service bulletin is not done, an inoperative RAT will cause the loss of hydraulic power to the primary flight controls and will impact the continued safe operation of the airplane.
There are two counterweights installed in the RAT hub assembly which are used to regulate the RAT turbine speed. A Ground test of the RAT will show the performance, but does not test the RAT speed through the full range of operation. In flight RAT extensions can generate higher speeds of operation, which will result in higher loads on the counterweight.
Hamilton Sundstrand told Boeing that the counterweights in some RATs could be under strength and fracture when the RAT is extended in flight. Counterweights have fractured at speeds within the RAT's range of operation during laboratory tests conducted by Hamilton Sundstrand. As a result, Hamilton Sundstrand requested a recall of several RAT hub assemblies with serial numbers directly before and after the fractured test unit. Equivalent tests were done on RAT counterweights from different manufactured lots. These tests have all resulted in no fault found.
This service bulletin tells affected operators to access the RAT and inspect the hub assembly serial number in accordance with Hamilton Sundstrand SB 730814-29-12, dated November 30, 2005. Replace the RAT hub assembly if it is on the Hamilton Sundstrand recall list.
Boeing Service Related Problem (SRP) 757-SRP-29-0073 is related to this service bulletin.
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Original Issue: January 02, 2007 757-29A0066Revision 1: March 08, 2010 7 of 26
ACTION Get access to the right wheel well. Extend the Ram Air Turbine (RAT). Do a general visual inspection of the RAT hub assembly at the intervals given in Paragraph 1.E., Compliance. Inspect for serial numbers that are on the recall list in accordance with Hamilton Sundstrand SB 730814-29-12, dated November 30, 2005.
1. If the RAT hub assembly serial number is not on the recall list, retract the RAT and put the airplane back to a serviceable condition.
2. If the RAT hub assembly serial number is on the recall list, replace the RAT hub assembly at the intervals given in Paragraph 1.E., Compliance. Return the removed RAT hub assembly to Hamilton Sundstrand for rework and test in accordance with Hamilton Sundstrand SB 730814-29-12, dated November 30, 2005. Do a functional test of the RAT Pump and Drive system for the replaced, reworked RAT. Put the airplane back to a serviceable condition.
EFFECTIVITY All 757-200/-200CB/-200PF/-300 Airplanes. Refer to Paragraph 1.A.1., Airplanes for the list of affected airplanes.
COMPLIANCE Federal Aviation Administration (FAA) Notice of Proposed Rule Making FAA NPRM 2007-NM-223-AD, is related to this service bulletin.
Refer to Paragraph 1.E., Compliance.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspection, and/or repair procedures 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: January 02, 2007 757-29A0066Revision 1: March 08, 2010 8 of 26 BOEING SERVICE BULLETIN 757-29A0066
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BOEING SERVICE BULLETIN 757-29A0066
ALERT ALERT RAT
COMPARTMENT DOOR RAT STRUT
RAT COMPARTMENT DOOR -INSPECT RAM AIR TURBINE (RAT) HUB ASSEMBLY
IN ACCORDANCE WITH HAMILTON SUNDSTRAND SERVICE BULLETIN 730814-29-12 -IF THE SERIAL NUMBER IS ON THE HAMILTON SUNDSTRAND FWD MAINBD
SERVICE BULLETIN RECALL LIST, INSTALL NEW RAT HUB ASSEMBLY SUPPLIED BY HAMILTON SUNDSTRAND.
-IF THE SERIAL NUMBER IS NOT ON THE RECALL LIST,
PUT THE AIRPLANE BACK TO A SERVICEABLE CONDITION J70483 Original Issue: January 02, 2007 Revision 1: March 08, 2010 757-29A0066
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9 of 26
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 02, 2007 757-29A0066Revision 1: March 08, 2010 10 of 26 BOEING SERVICE BULLETIN 757-29A0066
ALERTALERT
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Commercial Airplanes 757 Service Bulletin ALERT Number: 757-29A0066 Original Issue: January 02, 2007 Revision 1: March 08, 2010 ATA System: 2921 SUBJECT: HYDRAULIC POWER - Ram Air Turbine (RAT) System - RAT Hub Assembly Inspection and Replacement
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 with Ram Air Turbine (RAT) hub assemblies as shown in Hamilton Sundstrand SB 730814-29-12, dated November 30, 2005.
NOTE: The RAT hub assembly identified in Hamilton Sundstrand SB 730814-29-12, dated November 30, 2005 may no longer be installed in the identified airplanes due to maintenance action that could have been previously done on the hub assemblies.
DESCRIPTIONCONFIGURATIONGROUP All 757-200/-200CB/-200PF/-300 Airplanes.-1 Airplane Models:
757-200, 757-200CB, 757-200PF, 757-300 GroupVariable Number 1NA001 - NA028 1NA191 - NA199 1NA201 - NA239
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GroupVariable Number 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 1NB561 1NB571 1NB581 - NB583 1NC001 - NC033
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Original Issue: January 02, 2007 757-29A0066Revision 1: March 08, 2010 12 of 26 BOEING SERVICE BULLETIN 757-29A0066