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Commercial Airplanes 767 Service Bulletin ALERT Number: 767-29A0110 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2007 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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.

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Table of Contents

Revision Transmittal Sheet5

Summary9

1. PLANNING INFORMATION ........................................ 1 3 A. Effectivity ............................................... 1 3

1. Airplanes ............................................ 1 3

2. Spares Affected ........................................ 1 9 B. Concurrent Requirements ...................................... 1 9 C. Reason ................................................ 1 9 D. Description .............................................. 2 0 E. Compliance .............................................. 2 0 F. Approval ............................................... 2 1 G. Manpower .............................................. 2 1 H. Weight and Balance Changes .................................... 2 1 I. Electrical Load Data ......................................... 2 2 J. References .............................................. 2 2

1. Existing Data: ......................................... 2 2

2. Data supplied with this Service Bulletin: ........................... 2 2

3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 2 2 K. Publications Affected ........................................ 2 2 L. Interchangeability and Intermixability of Parts ........................... 2 2

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 6 FIGURE 1: RAM AIR TURBINE (RAT) HUB ASSEMBLY REPLACEMENT ............... 2 8 Appendix A: FORM FOR OPERATOR FEEDBACK ............................ 3 0

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Commercial Airplanes 767 Service Bulletin ALERT Revision Transmittal SheetNumber: 767-29A0110Original 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 VA001 thru VA020, VA301 thru VA315, VA501 thru VA530, VA701 thru VA719, VA801 thru VA810, VB001 thru VB002, VB051 thru VB055, VB101 thru VB125, VB201 thru VB202, VB251 thru VB253, VB281 thru VB284, VB301 thru VB302, VB321 thru VB332, VB371 thru VB373, VB401, VB441 thru VB444, VE001 thru VE003, VE021 thru VE023, VE041 thru VE043, VE061 thru VE069, VE083 thru VE086, VE101 thru VE104, VE116 thru VE118, VE121 thru VE126, VE141 thru VE148, VE150 thru VE152, VE171 thru VE172, VF001 thru VF002, VF041 thru VF042, VF051, VF061, VF071 thru VF072, VF091 thru VF093, VF101 thru VF102, VF161 thru VF162, VF171 thru VF172, VF180 thru VF184, VF251, VK001 thru VK016, VK021 thru VK022, VK031 thru VK046, VK048 thru VK056, VK081 thru VK113, VK131 thru VK133, VK141, VK143 thru VK148, VK161 thru VK164, VK171, VK181, VK186, VL001 thru VL006, VL011, VL701 thru VL703, VL751 thru VL755, VL806 thru VL807, VL871 thru VL873, VL891 thru VL900, VL911 thru VL914, VL931 thru VL932, VL941, VN001 thru VN041, VN051 thru VN064, VN081 thru VN087, VN089 thru VN099, VN111 thru VN117, VN119 thru VN127, VN130 thru VN131, VN133 thru VN137, VN151 thru VN155, VN157 thru VN158, VN163 thru VN164, VN166 thru VN168, VN171 thru VN174, VN191 thru VN198, VN211 thru VN212, VN221 thru VN225, VN231 thru VN234, VN241 thru VN243, VN251 thru VN255, VN258 thru VN276, VN291 thru VN293, VN301, VN304 thru VN314, VN371 thru VN372, VN376, VN381 thru VN388, VN421 thru VN427, VN436, VN471 thru VN472, VN491 thru VN513, VN531 thru VN532, VN536 thru VN537, VN541 thru VN542, VN546 thru VN547, VN551, VN556 thru VN557, VN561 thru VN562, VN631 thru VN638, VN651 thru VN658, VN671 thru VN672, VN676, VN681 thru VN691, VN732, VN751 thru VN753, VN791 thru VN792, VN811 thru VN813, VN921 thru VN922, VN931 thru VN936, VN951 thru VN953, VN966 thru VN972, VQ001 thru VQ021, VQ071 thru VQ086, VQ111, VR051 thru VR060, VR081, VR084, VR086 thru VR089, VR106 thru VR109, VR201 thru VR211, VR251, VR256 thru VR260, VR401, VR421 thru VR423, VR426, VR441, VR461, VR471 thru VR472, VS051 thru VS056, VS061, VS066 thru VS070, VS073 thru VS078, VS091 thru VS104, VS111 thru VS113, VS131 thru VS133, VS136 thru VS137, VS176 thru VS177, VS186 thru VS187, VS196 thru VS203, VS206 thru VS208, VS211, VS216 thru VS217, VS231, VS246 thru VS248, VS261 thru VS263, VS266 thru VS274, VS291 thru VS293, VS301 thru VS303, VS306 thru VS311, VS316, VS321 thru VS324, VS331 thru VS333, VS336 thru VS337, VS366 thru VS367, VS381 thru VS382,

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VS391 thru VS392, VS401, VS426 thru VS428, VS466 thru VS472, VS486, VS496 thru VS497, VS506 thru VS507, VS526, VS546 thru VS549, VS701 thru VS736, VS751 thru VS759, VS821 thru VS825, VS841 thru VS844, VS861, VS881 thru VS883, VS891, VS896, VS901 thru VS912, VS916, VS921 thru VS922, VS931, VT501, VT511 thru VT513, VT521 thru VT523, VT531 thru VT533, VV001, VW701 thru VW721 and VW851, are added to Group 1 of the service bulletin effectivity.

REASON FOR REVISION This revision is sent to add 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: 767-300F and 767-400ER airplanes are added to the effectivity paragraph.

– Compliance: FAA Notice of Propose 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 as additional airplanes are added.

– Paragraph 1.B., Concurrent requirements: Hamilton Sundstrand SB 729548-29-15, dated November 30, 2005 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 FAA Notice of Propose 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.

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REVISION HISTORY January 02, 2007Original Issue:

March 08, 2010Revision 1:

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Commercial Airplanes 767 Service Bulletin ALERT SummaryNumber: 767-29A0110Original 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 729548-29-15, dated November 30, 2005. Replace the RAT hub assembly if it is on the Hamilton Sundstrand recall list.

Boeing Service Related Problem (SRP) 767-SRP-29-0073 is related to this service bulletin.

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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 729548-29-15, 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 729548-29-15, 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 767-200/-300/-300F/-400ER 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.

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BOEING SERVICE BULLETIN 767-29A0110

ALERT ALERT RAT

COMPARTMENT DOOR RAT

RAT COMPARTMENT DOOR STRUT -INSPECT RAM AIR TURBINE (RAT) HUB ASSEMBLY

IN ACCORDANCE WITH HAMILTON SUNDSTRAND SERVICE BULLETIN 729548-29-15 -IF THE SERIAL NUMBER IS ON THE HAMILTON SUNDSTRAND

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 J92917 Original Issue: January 02, 2007 Revision 1: March 08, 2010 767-29A0110

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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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