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Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION Number: 737-29-1113 Original Issue: March 23, 2011 Revision 1: March 29, 2013 ATA System: 2900 SUBJECT: HYDRAULIC POWER - Right Main Landing Gear Wheel Well - Wire Bundle and Hydraulic Tubing - Inspection, Repair and New Clamps Installation 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 © 2011 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Unpublished Work.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: March 23, 2011 737-29-1113Revision 1: March 29, 2013 1 of 37
4.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 23, 2011 737-29-1113Revision 1: March 29, 2013 2 of 37 BOEING SERVICE BULLETIN 737-29-1113
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 ........................................ 2 0 B. Concurrent Requirements ...................................... 2 0 C. Reason ................................................ 2 0 D. Description .............................................. 2 1 E. Compliance .............................................. 2 1 F. Approval ............................................... 2 2 G. Manpower .............................................. 2 2 H. Weight and Balance Changes .................................... 2 2 I. Electrical Load Data ......................................... 2 2 J. References .............................................. 2 2
1. Existing Data: ......................................... 2 2
2. Data Supplied with this Service Bulletin: ........................... 2 3
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 2 3 K. Publications Affected ........................................ 2 3 L. Interchangeability and Intermixability of Parts ........................... 2 4 M. Software Accomplishment Summary ................................ 2 4
2. MATERIAL INFORMATION ........................................ 2 5 A. Material - Price and Availability ................................... 2 5 B. Industry Support Information .................................... 2 5 C. Parts Necessary for Each Airplane ................................. 2 5
1. Kits/Parts ............................................ 2 5
2. Parts and Materials Supplied by the Operator ........................ 2 5
3. Parts Modified and Reidentified ................................ 2 5
4. Parts Removed and Not Replaced .............................. 2 6 D. Parts Necessary to Change Spares ................................. 2 6 E. Special Tooling - Price and Availability ............................... 2 6 F. Special Tooling Necessary to do this Service Bulletin ....................... 2 6
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 7 A. GENERAL INFORMATION ..................................... 2 7 B. WORK INSTRUCTIONS ....................................... 2 8 FIGURE 1: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - HYDRAULIC TUBING AND WIRE BUNDLES - INSPECTION ....................... 3 3 FIGURE 2: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - CLAMPS - INSTALLATION ......................................... 3 5 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 23, 2011 737-29-1113Revision 1: March 29, 2013 3 of 37 BOEING SERVICE BULLETIN 737-29-1113
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 23, 2011 737-29-1113Revision 1: March 29, 2013 4 of 37 BOEING SERVICE BULLETIN 737-29-1113
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Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION Revision Transmittal SheetNumber: 737-29-1113Original Issue: March 23, 2011 Revision 1: March 29, 2013 ATA System: 2900 SUBJECT: HYDRAULIC POWER - Right Main Landing Gear Wheel Well - Wire Bundle and Hydraulic Tubing - Inspection, Repair and New Clamps Installation This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2011-NM-250-AD, is related to this service bulletin.
No more work is necessary on the airplane(s) changed in accordance with the original issue of this service bulletin.
Airplanes line numbers 3138, 3158, 3169, 3175, 3216, 3224, 3253, 3274, 3290 thru 3293 and 3295 thru 3347 are removed from the service bulletin effectivity.
REASON FOR REVISION This revision is sent to remove airplanes line numbers 3138, 3158, 3169, 3175, 3216, 3224, 3253, 3274, 3290 thru 3293 and 3295 thru 3347 from the service bulletin effectivity. These airplanes were reworked out of sequence in production and have incorporated the change given in this service bulletin. FAA NPRM 2011-NM-250-AD is also added.
These sections are changed:
1. Summary Compliance: Added new FAA NPRM.
2. Paragraph 1.A., Effectivity: Changed effectivity for Group 1 and corrected group configuration description column.
3. Paragraph 1.E., Compliance: Added new FAA NPRM.
4. Paragraph 1.J., References: Updated.
5. Paragraph 1.M., Software Accomplishment Summary: Added.
6. Figure 2 step table: Corrected footnote (a).
The applicable data given in Information Notice 737-29-1113 IN 01 is included in this revision.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 23, 2011 737-29-1113Revision 1: March 29, 2013 5 of 37
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 March 23, 2011Original Issue:
March 29, 2013Revision 1:
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 23, 2011 737-29-1113Revision 1: March 29, 2013 6 of 37 BOEING SERVICE BULLETIN 737-29-1113
Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION SummaryNumber: 737-29-1113Original Issue: March 23, 2011 Revision 1: March 29, 2013 ATA System: 2900 SUBJECT: HYDRAULIC POWER - Right Main Landing Gear Wheel Well - Wire Bundle and Hydraulic Tubing - Inspection, Repair and New Clamps Installation BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY.
CONCURRENT REQUIREMENTS None.
BACKGROUND This service bulletin is sent to prevent possible wire chafing damage to wire bundles W6128, W7122, W8122 and W8222, caused by insufficient separation from hydraulic tubing in two locations below Electric Motor Driven Pump (EMDP) 'B' in the Main Landing Gear (MLG) wheel well. If this service bulletin is not done, wire chafing could result in arcing, which could also cause damage to wires and hydraulic tubing that could then result in operational disruption and unplanned maintenance.
Boeing has received a report, from a 737-800 operator, which told of damage to wire W8222-6011-18. The wire was arcing to hydraulic tubing in a location below EMDP 'B' on the forward bulkhead of the MLG wheel well.
The short circuit to the hydraulic tubing caused a circuit breaker to open. Boeing inspected some airplanes in production and found that there was not sufficient separation between the wire bundles, that include W8222, and adjacent hydraulic tubing at that location. As a result, Boeing added a new clamping configuration to production airplanes from line number 3348 and on. Airplanes before line number 1060 do not need this change, because of a configuration difference, in the applicable area. Boeing is issuing this service bulletin as a fix for applicable in-service airplanes. New clamps are added, at the location where damage occurred, to secure wire bundles W6128, W7122, W8122 and W8222 and keep sufficient clearance between the wire bundles and adjacent hydraulic tubing.
Accomplishment of this service bulletin will inspect the four wire bundles, located below EMDP 'B', for wire chafing damage and repair as necessary. The related hydraulic tubing will also be inspected and replaced or repaired as necessary. New clamps are installed between the wire bundles and the adjacent hydraulic tubing, P/N 272A4451-136 at STA663 RBL10 WL161, to give sufficient separation to prevent possible wire chafing damage.
Boeing Service Related Problem (SRP) 737NG-24-0138 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 737NG FTD 20-10001 is related to this service bulletin.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 23, 2011 737-29-1113Revision 1: March 29, 2013 7 of 37
ACTION (PRR 38275-173S) Get access to the right side of the MLG wheel well. Do a General Visual Inspection (GVI) for wire chafing damage of wire bundles W6128, W7122, W8122 and W8222 and hydraulic tubing, P/N 272A4451-136 and 272A4451-137, in an area below Electric Motor Driven Pump 'B' on the forward bulkhead. If any wire bundles are found to be damaged, repair as necessary. If any hydraulic tubing is found to be damaged, replace or repair as necessary.
Install new clamps at the intersection between the wire bundles and the hydraulic tubing, P/N 272A4451-136.
Do a test of applicable electrical systems, where wire bundles were repaired. Service the hydraulic system if hydraulic tubing was replaced or repaired. Put airplane back to a serviceable condition.
EFFECTIVITY 737-600, -700, -700C, -800, -900 and -900ER Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
COMPLIANCE Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2011-NM-250-AD, is related to this service bulletin.
Boeing recommends that the inspection, change and repair given in this service bulletin be done within 24 months after the original issue date of this service bulletin.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are available for 737 airplanes in warranty as of May 20, 2010. Please refer to Paragraph 2.B., Industry Support Information.
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Operator Supplied Parts/Materials.
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: March 23, 2011 737-29-1113Revision 1: March 29, 2013 8 of 37 BOEING SERVICE BULLETIN 737-29-1113
BOEING SERVICE BULLETIN 737-29-1113
MAIN LANDING GEAR WHEEL WELL
FORWARD BULKHEAD, RIGHT SIDE
HYDRAULIC TUBING
DO A GENERAL VISUAL INSPECTION (GVI) FOR
WIRE CHAFING DAMAGE, OF WIRE BUNDLES INBD W6128, W7122, W8122 AND W8222 AND HYDRAULIC TÚBING, P/N 272A4451-136 AND 272A4451-137, IN THE AREA BELOW THE
ELECTRIC MOTOR DRIVEN PUMP 'B', ON THE
RIGHT SIDE OF THE MLG WHEEL WELL FORWARD BULKHEAD. REPAIR THE WIRE BUNDLES AND REPLACE WIRE BUNDLES W6128, NEW WIRE BUNDLE CLAMPS HYDRAULIC TUBING IF NECESSARY. INSTALL W7122, W8122 AND NEW CLAMPS AND ADJUST WIRE BUNDLES. W8222 2038913 Original Issue: March 23, 2011 Revision 1: March 29, 2013 Export Controlled ECCN: 9E991 - BOEING 737-29-1113 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9 of 37
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 23, 2011 737-29-1113Revision 1: March 29, 2013 10 of 37 BOEING SERVICE BULLETIN 737-29-1113
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Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION Number: 737-29-1113 Original Issue: March 23, 2011 Revision 1: March 29, 2013 ATA System: 2900 SUBJECT: HYDRAULIC POWER - Right Main Landing Gear Wheel Well - Wire Bundle and Hydraulic Tubing - Inspection, Repair and New Clamps Installation BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes Refer to Service Bulletin Index Document D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is for the airplanes shown below. An equivalent change is on subsequent production airplanes. Refer to PRR 38275-173S for data about this change.
DESCRIPTIONCONFIGURATIONGROUP 737-600/700/700C/800/900/900ER airplanes, line numbers 1060 thru 3289 and 3294, but excluding line numbers 3138, 3158, 3169, 3175, 3216, 3224, 3253 and 3274, without sufficient separation between hydraulic tubing, P/N 272A4451-136 / -137, and wire bundles W6128, W7122, W8122 and W8222.
-1 Airplane Models:
737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER GroupVariable Number 1YA119 - YA199 1YA211 1YA221 1YA341 - YA345 1YA357 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 23, 2011 737-29-1113Revision 1: March 29, 2013 11 of 37
GroupVariable Number 1YA367 1YA371 - YA377 1YA551 - YA552 1YA630 - YA631 1YA636 1YA641 - YA642 1YA648 - YA650 1YA657 - YA659 1YA666 - YA667 1YA671 - YA672 1YA691 1YA707 - YA710 1YA835 1YA857 - YA862 1YA967 - YA978 1YB111 - YB132 1YB156 - YB158 1YB163 - YB164 1YB184 1YB206 - YB208 1YB306 - YB310 1YB371 - YB392 1YB522 - YB526 1YB541 - YB544 1YB551 1YB561 - YB598 1YB601 - YB635 1YB651 1YB656 1YB671 - YB672 1YB851 - YB863 1YB871 - YB874 1YB881 - YB893 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 23, 2011 737-29-1113Revision 1: March 29, 2013 12 of 37 BOEING SERVICE BULLETIN 737-29-1113