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Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION Number: 737-29-1113 Original Issue: March 23, 2011 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 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2011 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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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Original Issue: March 23, 2011 737-29-1113 1 of 35
3.0
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Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected ........................................ 1 8 B. Concurrent Requirements ...................................... 1 8 C. Reason ................................................ 1 8 D. Description .............................................. 1 9 E. Compliance .............................................. 1 9 F. Approval ............................................... 1 9 G. Manpower .............................................. 2 0 H. Weight and Balance Changes .................................... 2 0 I. Electrical Load Data ......................................... 2 0 J. References .............................................. 2 0
1. Existing Data .......................................... 2 0
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 4 D. Parts Necessary to Change Spares ................................. 2 4 E. Special Tooling - Price and Availability ............................... 2 4 F. Special Tooling Necessary to do this Service Bulletin ....................... 2 4
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 5 A. GENERAL INFORMATION ..................................... 2 5 B. WORK INSTRUCTIONS ....................................... 2 6 FIGURE 1: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - HYDRAULIC TUBING AND WIRE BUNDLES - INSPECTION ....................... 3 1 FIGURE 2: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - CLAMPS - INSTALLATION ......................................... 3 3
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Original Issue: March 23, 2011 737-29-1113 3 of 35 BOEING SERVICE BULLETIN 737-29-1113
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Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION SummaryNumber: 737-29-1113Original Issue: March 23, 2011 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.
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Original Issue: March 23, 2011 737-29-1113 5 of 35
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 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.
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.
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.
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Original Issue: March 23, 2011 737-29-1113 6 of 35 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 TUBING, 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 WIRE NEW WIRE BUNDLES A OR REPAIR THE BUNDLES W6128, BUNDLE CLAMPS HYDRAULIC TUBING IF NECESSARY. INSTALL W7122, W8122 AND NEW CLAMPS AND ADJUST WIRE BUNDLES. W8222 2038913 Original Issue: March 23, 2011 737-29-1113
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Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION Number: 737-29-1113 Original Issue: March 23, 2011 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 3447, 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 1YA367
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GroupVariable Number 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 1YB901 - YB903
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GroupVariable Number 1YB911 1YB961 - YB974 1YB986 - YB995 1YC029 - YC030 1YC083 - YC084 1YC091 - YC095 1YC168 - YC170 1YC176 - YC179 1YC186 - YC190 1YC201 - YC203 1YC206 - YC207 1YC304 - YC305 1YC383 - YC387 1YC393 - YC394 1YC415 1YC422 1YC427 - YC428 1YC436 - YC439 1YC490 - YC499 1YC525 - YC526 1YC582 - YC583 1YC654 - YC655 1YC738 - YC750 1YC881 - YC892 1YC921 - YC922 1YC949 - YC951 1YC977 - YC978 1YD006 - YD007 1YD054 - YD057 1YD108 - YD110 1YD153 - YD159 1YD208 - YD209 1YD216 - YD219
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GroupVariable Number 1YD252 - YD254 1YD256 - YD257 1YD261 1YD317 - YD334 1YD391 1YD408 - YD410 1YD412 - YD416 1YD481 - YD485 1YD491 - YD499 1YD507 - YD512 1YD535 1YD543 - YD547 1YD561 - YD564 1YD571 - YD572 1YD591 - YD595 1YD612 1YD651 - YD655 1YE204 - YE206 1YE301 - YE305 1YE321 - YE326 1YE371 - YE383 1YF001 - YF009 1YF021 - YF043 1YF046 - YF047 1YF051 - YF060 1YF086 1YF106 - YF107 1YF111 - YF114 1YF116 - YF117 1YF121 - YF125 1YF176 - YF178 1YF191 - YF192 1YF201 - YF256
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