Commercial 

Airplanes 737

Service Bulletin

ALERT

Number: 737-29A1119

Original Issue: August 04, 2015

Revision 1: June 23, 2016

ATA System: 2911

SUBJECT: HYDRAULIC POWER - Hydraulic Systems A and B - Wire Bundles and Hydraulic Tube

Clamp 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.

ECCN: 9E991

BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET

Copyright © 2015 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Unpublished Work.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, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, 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.

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3.0
Export Controlled ECCN: 9E991 - BOEING

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ALERT ALERT

BLANK PAGE
Table of Contents

Revision Transmittal Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

E. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2. Data Supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . . 31

K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

M. Software Accomplishment Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

A. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

C. Parts Necessary for Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2. Parts and Materials Supplied by the Operator . . . . . . . . . . . . . . . . . . . . . . . . 35

3. Parts Modified and Reidentified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

4. Parts Removed and Not Replaced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 36

3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

FIGURE 1: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - HYDRAULIC

TUBE AND WIRE BUNDLES - INSPECTION [Group 1] . . . . . . . . . . . . . . . . . . . 42

FIGURE 2: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - HYDRAULIC

TUBE AND WIRE BUNDLES - INSPECTION [Group 2] . . . . . . . . . . . . . . . . . . . 44

FIGURE 3: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - CLAMPS -

INSTALLATION [Group 1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

FIGURE 4: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - CLAMPS -

INSTALLATION [Group 2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

APPENDIX A: PART DEMAND INTENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Export Controlled ECCN: 9E991 - BOEING

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT

BLANK PAGE
Commercial 

Airplanes 737

Service Bulletin

ALERT

Revision Transmittal Sheet Number: 737-29A1119

Original Issue: August 04, 2015

Revision 1: June 23, 2016

ATA System: 2911

SUBJECT: HYDRAULIC POWER - Hydraulic Systems A and B - Wire Bundles and Hydraulic Tube

Clamp 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 2015-NM-144-AD, is related to

this service bulletin.

Effects of this Revision on airplanes on which the Original Issue was previously done:

None.

REASON FOR REVISION

This revision is sent to incorporate changes identified during validation of the Original Issue. Also, the work

instructions have been rewritten to improve operator usability.

As a part of a service bulletin validation program, this change was completed on airplane YM346 by Service

Bulletin 737-29A1119 Original Issue before the release of Revision 1 of this service bulletin. The change

completed on airplane YM346 by Service Bulletin 737-29A1119 Original Issue is equivalent to the release of

Revision 1 of this service bulletin. Airplane YM346 has the configuration of a Group 1 airplane.

The data given in Information Notice 737-29A1119 IN01 and IN02 is included in this revision.

These sections were changed:

1. Summary: Added validation summary, updated Summary Evaluation Table.

2. Paragraph 1.C. Reason: Added validation summary.

3. Paragraph 1.E. Compliance: Deleted compliance table and updated boilerplate. Added reference to

NPRM.

4. Paragraph 1.J.1. References: Changed references.

5. Paragraph 1.K.1. Publications Affected: Changed publication.

6. Paragraph 2.A. Material - Price and Availability: Updated kit pricing.

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5 of 52
7. Paragraph 2.C.1. Parts Necessary for Each Airplane: Changed part number.

8. Paragraph 3.A. General Information: Updated notes.

9. Paragraph 3.B. Work Instructions: Consolidated work instructions, removed references to parts,

conditions, and actions, added Required for Compliance (RC) notation.

10. Paragraph 3.B. Work Instructions, Step 14.a: Changed reference.

11. FIGURE 1 and FIGURE 2, Step Table: Changed reference.

12. FIGURE 3 and FIGURE 4, Step Table: Changed part number and Footnote (a), corrected part number

in Footnote (b), deleted interal reference in Step 1.

13. Appendix A: Deleted Logic Diagram.

Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity and format changes,

to show the location of all content changes.

Pages with no vertical lines have no changes.

REVISION HISTORY

Original Issue: August 04, 2015

Revision 1: June 23, 2016

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
Commercial 

Airplanes 737

Service Bulletin

ALERT

Summary Number: 737-29A1119

Original Issue: August 04, 2015

Revision 1: June 23, 2016

ATA System: 2911

SUBJECT: HYDRAULIC POWER - Hydraulic Systems A and B - Wire Bundles and Hydraulic Tube

Clamp Installation

THIS DOCUMENT 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 DOCUMENT

TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE

NEW OWNER.

CONCURRENT REQUIREMENTS

None.

BACKGROUND

This service bulletin is sent to prevent possible wire chafing damage to wire bundles W6128 and W8122 caused

by insufficient separation from a hydraulic tube in the Main Landing Gear (MLG) wheel well. If this service bulletin

is not done, wire chafing between the wire bundle and hydraulic tube could cause arcing and a loss of hydraulic

fluid, which may result in a wheel well fire.

Boeing has received a report of damage to wire W6128-0506-10. The wire had chafed and arced to an adjacent

hydraulic tube located in the forward bulkhead of the MLG wheel well. The chafing and electrical arc created a

small hole in the System B hydraulic tube and also caused damage to the wire bundle, which resulted in a ground

fault detection on the System A Electrical Motor-Driven Pump (EMDP). The small hole led to a total loss of

System B hydraulic fluid and the ground fault resulted in removal of power from the System A EMDP and

illumination of the System A EMDP low power light. Boeing investigated this problem and found that there was

not sufficient separation between the wire bundles W6128 and W8122 and the adjacent hydraulic tube at that

location. As a result, Boeing is issuing this service bulletin to add clamps to separate the wire bundles from the

hydraulic tube on airplanes from line number 1060 and on. Airplanes before line number 1060 do not need this

change because of a configuration difference in the applicable area. This change will be incorporated on

in-production airplanes starting at line number 5432.

Boeing Service Related Problem (SRP) 737NG-SRP-29-0112 is related to this service bulletin.

Boeing Fleet Team Digest (FTD) 737NG FTD 29-15001 is related to this service bulletin.

As a part of a service bulletin validation program, this change was completed on airplane YM346 by Service

Bulletin 737-29A1119 Original Issue before the release of Revision 1 of this service bulletin. The change

completed on airplane YM346 by Service Bulletin 737-29A1119 Original Issue is equivalent to the release of

Revision 1 of this service bulletin. Airplane YM346 has the configuration of a Group 1 airplane.

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7 of 52
This table is provided to operators for planning purposes only. Refer to the applicable sections for more

information.

Planning Data Affected Reference

Spares Affected No Paragraph 1.A.2., Spares Affected

Paragraph 1.E., Compliance and Paragraph

1.F., Approval

AD Related Yes

Weight and Balance Change No Paragraph 1.H., Weight and Balance Changes

Electrical Load Changed No Paragraph 1.I., Electrical Load Data

Publications Affected Yes Paragraph 1.K., Publications Affected

Airplane Flight Operations Affected (Flight Crew No Paragraph 1.K., Publications Affected

Operations Manual and/or FAA Approved Airplane Flight Manual)

Kits/Parts Required Yes Paragraph 2.C.1., Kits/Parts

Paragraph 2.C.2., Parts and Materials Supplied

by the Operator

Operator Supplied Parts/Material Yes

Paragraph 2.F., Special Tooling Necessary to

do this Service Bulletin

Special Tooling Required No

ACTION

In the right side of the Main Landing Gear wheel well, do a Detailed Inspection for damage of wire bundles and

a hydraulic tube. If the wire bundles are found to be damaged, repair as necessary. If the hydraulic tube is found

to be damaged, replace or repair as necessary. Install clamps and an optional spacer between the wire bundle

and hydraulic tube. Do a test of applicable electrical systems if the wire bundle was repaired. Service the hydraulic

system if the hydraulic tube was replaced or repaired.

EFFECTIVITY

737-600, -700, -700C, -800, -900 and -900ER Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of

affected airplane(s).

COMPLIANCE

Refer to Paragraph 1.E., Compliance.

INDUSTRY SUPPORT INFORMATION

Boeing warranty remedies are not available for the configuration changes, inspection, and repair procedures

given in this service bulletin.

MANPOWER

Refer to Paragraph 1.G., Manpower.

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
MATERIAL INFORMATION

Boeing Supplied Kits/Parts.

Refer to Paragraph 2.A., Material - Price and Availability.

Operators are encouraged to complete the survey provided in APPENDIX A of this service bulletin to help Boeing

predict the quantity and timing of the Boeing Supplied Kits/Parts.

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
Commercial 

Airplanes 737

Service Bulletin

ALERT

Number: 737-29A1119

Original Issue: August 04, 2015

Revision 1: June 23, 2016

ATA System: 2911

SUBJECT: HYDRAULIC POWER - Hydraulic Systems A and B - Wire Bundles and Hydraulic Tube

Clamp Installation

THIS DOCUMENT 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 DOCUMENT

TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE

NEW OWNER.

1. PLANNING INFORMATION

A. Effectivity

1. Airplanes

Refer to Service Bulletin Index D6-19567 Part 3 for Airplane Variable Number, Line Number, and

Serial Number data.

This service bulletin is applicable to 737-600, -700, -700C, -800, -900 and -900ER Airplanes, line

numbers 1060 to 5431 in 2 Groups. The Variable Numbers and Group Information for the applicable

airplanes is given below.

GROUP CONFIGURATION DESCRIPTION

737-600/700/800/900 with Hydraulic Tube P/N 272A4451-56 adjacent

to W6128 and W8122.

1 -

737-600/700/800/900 with Hydraulic Tube P/N 272A4451-1044

adjacent to W6128 and W8122.

2 -

Airplane Models:

737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER

Variable Number Group

YA119 - YA199 1

YA211 1

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Variable Number Group

YA221 1

YA341 - YA345 1

YA357 1

YA367 1

YA371 - YA377 1

YA551 - YA552 1

YA630 - YA631 1

YA636 1

YA641 - YA642 1

YA648 - YA650 1

YA657 - YA659 1

YA666 - YA667 1

YA671 - YA672 1

YA691 1

YA707 - YA710 1

YA835 1

YA857 - YA862 1

YA967 - YA978 1

YB111 - YB132 1

YB156 - YB158 1

YB163 - YB164 1

YB184 1

YB206 - YB208 1

YB306 - YB310 1

YB371 - YB392 1

YB522 - YB526 1

YB541 - YB544 1

YB551 1

YB561 - YB598 1

YB601 - YB635 1

YB636 2

YB651 1

YB656 1

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
Variable Number Group

YB671 - YB672 1

YB851 - YB863 1

YB871 - YB874 1

YB881 - YB893 1

YB901 - YB903 1

YB911 1

YB961 - YB974 1

YB975 2

YB981 2

YB986 - YB995 1

YB996 - YB998 2

YC029 - YC030 1

YC083 - YC084 1

YC091 - YC095 1

YC168 - YC170 1

YC176 - YC179 1

YC186 - YC190 1

YC201 - YC203 1

YC206 - YC207 1

YC304 - YC305 1

YC383 - YC387 1

YC393 - YC394 1

YC415 1

YC422 1

YC427 - YC428 1

YC436 - YC439 1

YC490 - YC499 1

YC525 - YC526 1

YC582 - YC583 1

YC654 - YC655 1

YC738 - YC750 1

YC881 - YC892 1

YC921 - YC922 1

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ALERT ALERT
Variable Number Group

YC949 - YC951 1

YC977 - YC978 1

YD006 - YD007 1

YD054 - YD057 1

YD108 - YD110 1

YD111 - YD117 2

YD153 - YD159 1

YD208 - YD209 1

YD216 - YD219 1

YD252 - YD254 1

YD256 - YD257 1

YD261 1

YD317 - YD334 1

YD391 1

YD408 - YD410 1

YD412 - YD416 1

YD417 - YD422 2

YD481 - YD485 1

YD491 - YD499 1

YD507 - YD512 1

YD535 1

YD543 - YD547 1

YD561 - YD564 1

YD571 - YD572 1

YD591 - YD595 1

YD612 1

YD651 - YD655 1

YE204 - YE206 1

YE301 - YE305 1

YE321 - YE326 1

YE371 - YE383 1

YF001 - YF007 1

YF008 - YF011 2

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ALERT ALERT
Variable Number Group

YF021 - YF040 1

YF041 - YF045 2

YF046 - YF047 1

YF048 - YF049 2

YF051 - YF060 1

YF061 - YF080 2

YF086 1

YF087 2

YF106 - YF107 1

YF111 - YF114 1

YF116 - YF117 1

YF118 - YF119 2

YF121 - YF124 1

YF125 - YF132 2

YF176 - YF178 1

YF191 - YF192 1

YF201 - YF251 1

YF252 - YF276 2

YF401 - YF402 1

YF431 - YF432 2

YF436 - YF437 2

YF441 1

YF442 2

YF451 - YF455 1

YF456 - YF460 2

YF501 - YF585 1

YF586 - YF599 2

YF601 - YF677 2

YF701 - YF706 1

YF707 2

YF801 - YF803 1

YF804 - YF805 2

YF831 - YF832 1

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
Variable Number Group

YF836 - YF837 1

YF838 2

YF871 - YF872 2

YF901 - YF903 1

YF904 - YF905 2

YF921 - YF922 1

YF923 - YF928 2

YF951 - YF954 2

YG043 - YG044 1

YG083 - YG089 1

YG091 - YG099 1

YG101 - YG103 1

YG104 2

YG111 - YG114 1

YG116 - YG125 1

YG126 - YG143 2

YG201 - YG205 1

YG211 - YG214 1

YG221 - YG223 1

YG224 2

YG251 - YG252 1

YG505 - YG509 1

YG510 - YG514 2

YG701 1

YG711 1

YH001 - YH012 1

YH031 - YH049 1

YH050 2

YH051 - YH055 1

YH071 - YH080 2

YH101 - YH130 1

YH131 - YH132 2

YH201 - YH202 1

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ALERT ALERT
Variable Number Group

YH206 - YH207 1

YH301 - YH305 1

YH306 2

YH321 - YH322 1

YH501 - YH542 2

YH551 - YH594 2

YH601 - YH606 2

YH611 - YH620 2

YH631 - YH632 2

YH636 - YH637 2

YH641 2

YH681 - YH682 2

YH701 - YH725 2

YH751 - YH754 2

YH801 - YH840 2

YH901 - YH905 2

YH911 - YH914 2

YH951 - YH952 2

YJ001 - YJ013 1

YJ021 1

YJ472 - YJ480 1

YJ514 - YJ517 1

YJ531 - YJ578 1

YJ579 2

YJ591 - YJ599 1

YJ631 - YJ632 1

YJ671 - YJ694 1

YJ801 - YJ867 1

YJ871 - YJ880 1

YJ901 - YJ904 1

YJ908 - YJ929 1

YJ931 - YJ937 1

YJ941 - YJ956 1

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Variable Number Group

YJ961 2

YJ976 - YJ977 1

YK001 - YK007 1

YK101 - YK104 1

YK111 - YK112 1

YK121 - YK122 1

YK131 - YK133 1

YK136 - YK139 1

YK141 - YK142 1

YK146 - YK148 1

YK151 - YK154 1

YK161 - YK167 1

YK171 1

YK176 - YK177 1

YK186 1

YK191 1

YK196 1

YK201 - YK202 1

YK301 - YK314 1

YK321 - YK340 1

YK361 - YK378 1

YK401 - YK406 1

YK426 - YK427 1

YK431 - YK450 1

YK456 - YK466 1

YK467 2

YK471 1

YK472 - YK473 2

YK476 1

YK480 - YK487 1

YK491 - YK493 2

YK495 - YK497 1

YK498 - YK499 2

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ALERT ALERT
Variable Number Group

YK511 - YK516 1

YK521 - YK530 1

YK551 - YK571 1

YK576 - YK577 1

YK580 - YK585 1

YK601 - YK602 1

YK606 - YK607 1

YK611 - YK616 1

YK621 - YK634 1

YK641 - YK644 1

YK651 - YK665 1

YK671 - YK672 1

YK676 - YK677 1

YK681 - YK686 1

YK691 1

YK695 - YK699 2

YK701 - YK713 1

YK716 - YK719 1

YK721 - YK741 1

YK751 - YK770 1

YK776 - YK778 1

YK781 - YK782 1

YK783 - YK785 2

YK791 - YK792 1

YK796 - YK797 1

YK801 - YK899 1

YK901 - YK912 1

YK918 - YK919 1

YK921 - YK927 1

YK928 - YK929 2

YK941 - YK956 1

YK957 - YK960 2

YK961 - YK992 1

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ALERT ALERT
Variable Number Group

YK993 - YK999 2

YL001 - YL005 1

YL011 - YL016 1

YL021 - YL024 1

YL051 - YL052 1

YL056 - YL057 1

YL061 1

YL066 - YL069 1

YL076 - YL077 1

YL101 - YL133 1

YL134 - YL137 2

YL201 - YL219 1

YL220 - YL237 2

YL241 - YL242 2

YL271 - YL272 1

YL281 - YL284 1

YL301 - YL303 1

YL311 - YL312 1

YL313 - YL314 2

YL316 - YL321 1

YL351 - YL353 1

YL371 - YL374 1

YL401 1

YL421 - YL429 1

YL431 - YL444 1

YL461 - YL478 1

YL501 - YL509 1

YL531 - YL534 1

YL541 - YL544 1

YL545 - YL551 2

YL561 - YL568 1

YL569 - YL579 2

YL591 - YL594 1

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ALERT ALERT
Variable Number Group

YL595 - YL598 2

YL601 - YL606 1

YL611 - YL612 1

YL616 - YL617 1

YL621 1

YL626 1

YL631 - YL634 1

YL636 - YL637 2

YL661 - YL664 1

YL676 - YL681 1

YL682 - YL690 2

YL691 1

YL696 - YL697 2

YL701 - YL704 1

YL705 - YL707 2

YL731 1

YL751 - YL752 1

YL756 - YL757 2

YL761 - YL772 1

YL773 - YL780 2

YL796 - YL797 2

YL801 - YL809 1

YL810 - YL815 2

YL901 - YL910 1

YL921 - YL937 1

YL938 - YL940 2

YL951 - YL963 1

YL964 - YL968 2

YM101 - YM103 1

YM201 - YM242 1

YM243 - YM244 2

YM251 - YM299 1

YM301 - YM393 1

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ALERT ALERT
Variable Number Group

YM394 - YM399 2

YM401 - YM415 2

YM471 1

YM481 - YM484 1

YM501 - YM515 1

YM521 - YM522 1

YM541 1

YM551 - YM553 1

YM571 - YM572 1

YM581 - YM582 1

YM591 - YM599 1

YM631 - YM634 1

YM641 - YM652 1

YM671 - YM674 1

YM691 - YM697 1

YM698 - YM699 2

YM701 - YM710 1

YM761 - YM763 1

YM764 - YM765 2

YM771 - YM779 2

YN001 - YN016 1

YN021 - YN024 1

YN061 1

YN071 - YN082 1

YN091 - YN092 1

YN101 - YN112 1

YN121 1

YN126 2

YN201 - YN202 1

YN211 - YN219 1

YN231 - YN235 1

YN236 2

YN261 1

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ALERT ALERT
Variable Number Group

YN501 2

YN531 - YN534 2

YN551 - YN563 2

YN581 - YN585 2

YN591 - YN592 2

YN601 - YN606 2

YN651 - YN653 2

YN701 - YN702 2

YN741 - YN746 2

YN756 2

YQ001 - YQ003 1

YQ011 1

YQ012 - YQ021 2

YQ026 1

YQ027 - YQ029 2

YQ036 - YQ045 2

YQ201 - YQ207 2

YQ231 2

YQ241 - YQ251 2

YQ281 - YQ284 2

YQ291 - YQ296 2

YQ301 - YQ302 2

YQ321 - YQ324 2

YQ331 - YQ334 2

YQ346 - YQ347 2

YQ351 2

YQ401 - YQ403 2

YQ451 - YQ454 2

YQ456 2

YQ461 2

YQ471 2

YQ501 - YQ519 2

YR001 - YR041 2

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ALERT ALERT
Variable Number Group

YR051 - YR087 2

YR091 - YR098 2

YR101 - YR105 2

YR111 - YR124 2

YR126 - YR144 2

YR166 - YR182 2

YR186 - YR198 2

YR201 - YR204 2

YR231 - YR294 2

YR296 - YR297 2

YR301 - YR334 2

YR338 - YR341 2

YR361 - YR366 2

YR371 - YR373 2

YR376 2

YR381 - YR382 2

YR386 - YR388 2

YR391 2

YR396 - YR398 2

YR401 - YR405 2

YR411 - YR413 2

YR416 - YR418 2

YR421 - YR424 2

YR426 - YR439 2

YR441 - YR455 2

YR457 - YR499 2

YR501 - YR506 2

YR511 - YR520 2

YR526 - YR544 2

YR546 - YR551 2

YR556 - YR562 2

YR571 - YR582 2

YR591 - YR592 2

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ALERT ALERT
Variable Number Group

YR601 - YR605 2

YR616 - YR658 2

YR661 - YR663 2

YR671 - YR672 2

YR676 - YR678 2

YR681 2

YR701 - YR769 2

YR771 - YR799 2

YR801 - YR816 2

YR831 - YR838 2

YR841 - YR891 2

YR901 - YR903 2

YR931 - YR934 2

YR938 - YR944 2

YR951 - YR970 2

YR981 - YR996 2

YS001 - YS002 2

YS006 - YS009 2

YS031 - YS032 2

YS051 - YS073 2

YS101 - YS120 2

YS126 - YS135 2

YS151 - YS160 2

YS166 - YS194 2

YS196 - YS197 2

YS201 - YS209 2

YS221 - YS225 2

YS231 - YS236 2

YS271 - YS286 2

YS301 - YS333 2

YS351 - YS365 2

YS371 - YS374 2

YS381 - YS383 2

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ALERT ALERT
Variable Number Group

YS401 2

YS451 2

YS456 - YS457 2

YS462 2

YS467 2

YS501 - YS502 2

YS506 2

YS511 - YS513 2

YS551 - YS553 2

YS561 - YS578 2

YS581 - YS595 2

YS601 - YS690 2

YS701 - YS708 2

YS721 - YS755 2

YS761 - YS762 2

YS771 - YS780 2

YS806 - YS810 2

YS816 - YS818 2

YS823 - YS825 2

YS851 - YS860 2

YS876 2

YS881 - YS883 2

YS901 - YS909 2

YS911 - YS925 2

YS961 - YS965 2

YS981 - YS983 2

YS991 - YS996 2

YT001 - YT004 2

YT006 2

YT026 - YT027 2

YT031 - YT032 2

YT036 - YT038 2

YT061 - YT068 2

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ALERT ALERT
Variable Number Group

YT101 - YT109 2

YT126 - YT129 2

YT136 - YT138 2

YT176 - YT181 2

YT196 - YT197 2

YT201 2

YT206 - YT207 2

YT211 - YT212 2

YT251 - YT270 2

YT301 - YT303 2

YT306 - YT307 2

YT311 - YT312 2

YT321 - YT323 2

YT401 - YT403 2

YT411 - YT415 2

YT427 2

YT461 - YT471 2

YT491 - YT492 2

YT501 2

YT551 2

YT556 2

YT561 2

YT601 - YT606 2

YT761 - YT776 2

YT796 2

YT801 - YT803 2

YT811 2

YT831 2

YT891 - YT894 2

YT901 - YT906 2

YU001 - YU042 2

YU201 - YU211 2

YV101 - YV104 2

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
2. Spares Affected

None.

B. Concurrent Requirements

None.

C. Reason

This service bulletin is sent to prevent possible wire chafing damage to wire bundles W6128 and W8122

caused by insufficient separation from a hydraulic tube in the Main Landing Gear (MLG) wheel well. If

this service bulletin is not done, wire chafing between the wire bundle and hydraulic tube could cause

arcing and a loss of hydraulic fluid, which may result in a wheel well fire.

Boeing has received a report of damage to wire W6128-0506-10. The wire had chafed and arced to

an adjacent hydraulic tube located in the forward bulkhead of the MLG wheel well. The chafing and

electrical arc created a small hole in the System B hydraulic tube and also caused damage to the wire

bundle, which resulted in a ground fault detection on the System A Electrical Motor-Driven Pump

(EMDP). The small hole led to a total loss of System B hydraulic fluid and the ground fault resulted in

removal of power from the System A EMDP and illumination of the System A EMDP low power light.

Boeing investigated this problem and found that there was not sufficient separation between the wire

bundles W6128 and W8122 and the adjacent hydraulic tube at that location. As a result, Boeing is

issuing this service bulletin to add clamps to separate the wire bundles from the hydraulic tube on

airplanes from line number 1060 and on. Airplanes before line number 1060 do not need this change

because of a configuration difference in the applicable area. This change will be incorporated on

in-production airplanes starting at line number 5432.

Boeing Service Related Problem (SRP) 737NG-SRP-29-0112 is related to this service bulletin.

Boeing Fleet Team Digest (FTD) 737NG FTD 29-15001 is related to this service bulletin.

As a part of a service bulletin validation program, this change was completed on airplane YM346 by

Service Bulletin 737-29A1119 Original Issue before the release of Revision 1 of this service bulletin.

The change completed on airplane YM346 by Service Bulletin 737-29A1119 Original Issue is equivalent

to the release of Revision 1 of this service bulletin. Airplane YM346 has the configuration of a Group

1 airplane.

Revision 1 is sent to incorporate changes identified during validation of the Original Issue. Also, the

work instructions have been rewritten to improve operator usability..

D. Description

In the right side of the Main Landing Gear wheel well, do a Detailed Inspection for damage of wire

bundles and a hydraulic tube. If the wire bundles are found to be damaged, repair as necessary. If the

hydraulic tube is found to be damaged, replace or repair as necessary. Install clamps and an optional

spacer between the wire bundle and hydraulic tube. Service the hydraulic system if the hydraulic tube

was replaced or repaired. Do a test of applicable electrical systems if the wire bundle was repaired.

Effects of this Revision on airplanes on which the Original Issue was previously done:

None.

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
The work in this service bulletin is done in the maintenance zone(s) given below.

Group 1:

Affected Maintenance Zones

Model Zone

737-600, 737-700, 737-700C, 134

737-800, 737-900, 737-900ER

Group 2:

Affected Maintenance Zones

Model Zone

737-700, 737-700C, 737-800, 134

737-900ER

E. Compliance

Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2015-NM-144-AD, is

related to this service bulletin.

Boeing recommends that the inspection and change given in this service bulletin be done within 24

months after the original issue date of this service bulletin. If any wire bundle or hydraulic tube damage

is found, repair or replace as given in this service bulletin before further flight.

Do the required actions in accordance with Paragraph 3. Accomplishment Instructions.

F. Approval

This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified

in this service bulletin comply with the applicable regulations and are FAA approved, as well as European

Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved

airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on

the airplane in its original Boeing delivery configuration or as modified by other approved Boeing

changes.

For 737-700C and BBJ models that have APB winglets installed by STC number ST00830SE, the

operator is responsible for obtaining appropriate regulatory agency approval before incorporating this

service bulletin if the bulletin is in the area affected by blended winglets.

If an airplane has a non-Boeing modification or repair that affects a component or system also affected

by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval

before incorporating this service bulletin.

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ALERT ALERT
G. Manpower

The table below shows an estimate of the task hours necessary to do this inspection/repair and change

for each airplane. This estimate is for direct labor only, done by an experienced crew. Adjust the estimate

with operator task hour data if necessary. The estimate does not include lost time. These are some

examples of lost time:

• Time to adjust to the workplace

• Time to schedule the work

• Time to inspect the work

• Time to cure the materials

• Time to make the parts

• Time to find the tools.

Group 1:

Task Number of Persons Task Hours Elapsed Hours

Open Access 1 0.50 0.50

FIGURE 1 1 0.25 0.25

FIGURE 3 1 0.35 0.35

Close Access 1 0.50 0.50

TOTAL FOR EACH AIRPLANE (a) 1.60 1.60

(a) Estimate assumes no damage is found on wire bundles or hydraulic tube. If

damage is found, more time is necessary.

Group 2:

Task Number of Persons Task Hours Elapsed Hours

Open Access 1 0.50 0.50

FIGURE 2 1 0.25 0.25

FIGURE 4 1 0.35 0.35

Close Access 1 0.50 0.50

TOTAL FOR EACH AIRPLANE (a) 1.60 1.60

(a) Estimate assumes no damage is found on wire bundles or hydraulic tube. If

damage is found, more time is necessary.

H. Weight and Balance Changes

None.

I. Electrical Load Data

Not changed.

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
J. References

1. Existing Data:

a. Boeing Service Related Problem (SRP) 737NG-SRP-29-0112

b. Federal Aviation Administration (FAA) Notice of Proposed Rule Making (NPRM)

2015-NM-144-AD

c. Service Bulletin Index D6-19567

d. Standard Overhaul Practices Manual (SOPM) 20-50-01

e. Standard Wiring Practices Manual (SWPM) 20-10-11, 20-10-12, 20-10-13, 20-10-19

f. 737-600/700/800/900 Aircraft Maintenance Manual (AMM) 12-12-00, 20-10-51, 24-22-00,

27-09-31, 27-09-61, 27-61-12, 27-81-00, 28-21-00, 29-09-00, 29-11-00, 29-11-21, 29-21-00,

29-22-00, 29-22-31, 29-32-00, 31-51-00, 32-00-01, 33-42-02

g. 737-600/700/800/900 Wiring Diagram Manual (WDM) 27-23-11, 27-23-14, 27-61-11, 27-81-51,

28-21-11, 29-11-12, 29-23-11, 29-25-11, 29-34-11, 31-31-15, 31-53-11, 33-42-11

h. 737NG Fleet Team Digest (FTD) 29-15001

2. Data Supplied with this Service Bulletin:

None.

3. Installation Drawings Used in the Preparation of this Service Bulletin:

Drawing Number Title

WIRE BUNDLE INSTL - MAIN WHEEL WELL FWD BULKHEAD

STA 663.75

288A4434

HYDRAULIC PLUMBING INSTL - MAIN WHEEL WELL, REAR

SPAR

272A4401

The table above lists applicable drawings used to prepare this service bulletin. The drawings are

not necessary to make the specified changes, and are not supplied with this service bulletin. The

drawings may not be applicable to all airplane configurations or operators.

K. Publications Affected

1. Publications:

Publication Chapter-Section

737 Aircraft Maintenance Manual 29-11

737 Illustrated Parts Catalog 29-32

2. Damage Tolerance Based Structural Inspections:

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
Boeing has evaluated the repairs and/or changes in this service bulletin for effects on Fatigue

Critical Structure (FCS) and for changes to Damage Tolerance Inspections (DTI) required in the

Maintenance Program. This service bulletin does not affect FCS, therefore DTIs are not necessary.

L. Interchangeability and Intermixability of Parts

Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts.

M. Software Accomplishment Summary

Not affected.

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
2. MATERIAL INFORMATION

A. Material - Price and Availability

Boeing can supply the kit shown in Paragraph 2.C., Parts Necessary for Each Airplane. Operators are

encouraged to share schedule requirements with Boeing for incorporation of the service bulletin. The

kits are subject to the terms and conditions of the Boeing standard purchase order acknowledgment.

Prices are in United States Dollars. Terms: Net 30 days.

Reference this service bulletin and submit your purchase order by one of these methods:

1. Order on-line via ATA Spec 2000 or The Boeing PART Page

2. Fax to (206) 662-7145

REFER TO THE BOEING PART PAGE ON MYBOEINGFLEET.COM OR CONTACT FIRST RESPONDER

AT FR@BOEING.COM FOR THE LATEST REORDER LEAD TIME (ROLT) AND PRICE INFORMATION

Unit Price as of

the original issue

date of this Service Bulletin (US

Dollars)

ROLT as of the

original issue

date of this Service Bulletin (Calendar Days)

Kit Number Name Date QTY

September 15, 1 225 36.00

2015

Top Kit - Wire Bundle/Hydraulic Tube

Clamp Installation

002A0014-116

December 10, 25

2015

December 17, 25

2015

January 4, 25

2016

January 11, 25

2016

January 18, 25

2016

January 25, 25

2016

February 1, 25

2016

February 8, 25

2016

Operators are encouraged to complete the survey provided in APPENDIX A of this service bulletin to

help Boeing predict the quantity and timing of the Boeing Supplied Kits/Parts.

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
B. Industry Support Information

Boeing warranty remedies are not available for the (configuration changes, inspection, and/or repair

procedures) given in this service bulletin.

C. Parts Necessary for Each Airplane

1. Kits/Parts

ALL

Kit 002A0014

Existing Part Notes

Number

New Part Number Qty Name

-116

Top Kit - Wire Bundle/Hydraulic Tube

Clamp Installation

002A0014-116 -

AS21919WCE10 1 CLAMP,LOOP

WIRE BUNDLE (a)

CLAMP

BACC10JU104 1

(BACC10GU104 or

BACC10JU104P

optional)

WIRE BUNDLE (a)

CLAMP

BACC10JU105 1

(BACC10GU105 or

BACC10JU105P

optional)

WIRE BUNDLE (a)

CLAMP

BACC10JU106 1

(BACC10GU106 or

BACC10JU106P

optional)

BACN10JC3CD 1 NUT

BACS12GU3K12 1 SCREW (a) (b)

BACS12GU3K16 1 SCREW (a) (b)

BACS12GU3K20 1 SCREW (a) (b)

BACS12GU3K24 1 SCREW (a) (b)

BACS12GU3K28 1 SCREW (a) (b)

BACS12GU3K32 1 SCREW (a) (b)

BACS12GU3K36 1 SCREW (a) (b)

BACS12GU3K8 1 SCREW (a) (b)

NAS1149D0316J 1 WASHER

SPACERS FOR (a) (b)

RIVETS

NAS42DD6-112FC 1

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
ALL

Kit 002A0014

Existing Part Notes

Number

New Part Number Qty Name

-116

SPACERS FOR (a) (b)

RIVETS

NAS42DD6-128FC 1

SPACERS FOR (a) (b)

RIVETS

NAS42DD6-16FC 1

SPACERS FOR (a) (b)

RIVETS

NAS42DD6-32FC 1

SPACERS FOR (a) (b)

RIVETS

NAS42DD6-48FC 1

SPACERS FOR (a) (b)

RIVETS

NAS42DD6-64FC 1

SPACERS FOR (a) (b)

RIVETS

NAS42DD6-80FC 1

SPACERS FOR (a) (b)

RIVETS

NAS42DD6-96FC 1

(a) There are more parts than are necessary.

(b) If grip length shown is not available at Boeing, fasteners supplied in kits

may be one grip length longer than indicated. Also, if any fastener part

numbers listed are not available or have been superseded, substitute

fasteners may be supplied in kits.

2. Parts and Materials Supplied by the Operator

The following parts or materials are necessary to do the change in this service bulletin. Parts and

materials in the manuals given in Paragraph 1.J., References, can also be necessary. Examine

operator part and material supply to make sure all necessary parts and materials are available.

Group 1:

Part Number/ QTY Name Notes

Specification

272A4451-56 1 HYDRAULIC TUBE (a)

(a) This part is only necessary if the existing hydraulic tube is found to be damaged, and is replaced. The

existing hydraulic tube can also be repaired.

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ALERT ALERT
Group 2:

Part Number/ QTY Name Notes

Specification

272A4451-1044 1 HYDRAULIC TUBE (a)

(a) This part is only necessary if the existing hydraulic tube is found to be damaged, and is replaced. The

existing hydraulic tube can also be repaired.

3. Parts Modified and Reidentified

None.

4. Parts Removed and Not Replaced

None.

D. Parts Necessary to Change Spares

None.

E. Special Tooling - Price and Availability

None.

F. Special Tooling Necessary to do this Service Bulletin

No special tools or equipment are necessary to do the change in this service bulletin. But, maintenance

and overhaul tools in the manuals given in Paragraph 1.J., References, can be necessary. Examine

operator tool supply to make sure all necessary tools are available.

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ALERT ALERT
3. ACCOMPLISHMENT INSTRUCTIONS

A. GENERAL INFORMATION

CAUTION: KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF METAL

PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED MATERIAL,

METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE BUNDLES CAN CAUSE

DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES CAN CAUSE SPARKS OR

OTHER ELECTRICAL DAMAGE.

NOTE: 1. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for

definition of the acronyms.

2. Obey all of the warnings and cautions given in the specified manual sections.

3. Unless shown differently, these dimensions and tolerances are used:

– Linear dimensions are in inches

– Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus

or minus 0.03 inch

– Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch

– Angular tolerance is plus or minus 2 degrees

– Hole dimensions for standard solid rivets and fasteners are in Structural Repair

Manual (SRM) Chapter 51

– Torque Values:

— Values for structural fasteners are given in 737 Structural Repair Manual,

Chapter 51.

— Values for airframe maintenance tasks are included in Chapter 20 of 737

Aircraft Maintenance Manual (AMM).

— Values for electrical maintenance tasks are included in Chapter 20 of

Standard Wiring Practices Manual (SWPM).

— Values for engine maintenance tasks are included in Chapter 70 of 737

Aircraft Maintenance Manual (AMM).

— Non-standard torque values for maintenance tasks are included in the

applicable installation step.

4. Use the approved fastener, process and material substitutions in accordance with

SRM Chapter 51.

5. Refer to the SWPM 20-10-11 and SWPM 20-10-12 for the wire installation procedures,

and SWPM 20-10-19 for the wire separation requirements, as accepted procedures.

6. The necessary conditions for selection of clamp type and size are included in SWPM

20-10-12. If any wire bundle support clamp specified in this service bulletin does not

make a correct fit on the wire bundle, refer to SWPM 20-10-12 as an accepted

procedure to select a clamp that fits correctly.

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7. If the length of any fastener specified in this service bulletin does not meet installation

standards given in SRM Chapter 51, then a fastener of the same specification, or

an approved substitute, with a length which meets the installation standards given

in SRM Chapter 51 may be used. In addition, washers may be installed for fastener

grip length in accordance with SRM Chapter 51. Refer to SOPM 20-50-01 for alternate

full threaded fasteners (screws) needed for installation in this service bulletin.

8. A Detailed Inspection is defined as: An intensive examination of a specific item,

installation, or assembly to detect damage, failure, or irregularity. Available lighting

is normally supplemented with a direct source of good lighting at an intensity deemed

appropriate. Inspection aids such as mirrors, magnifying lenses, etc. may be

necessary. Surface cleaning and elaborate procedures may be required.

9. These work instructions refer to procedures included in other Boeing documents.

When the words "refer to" are used and the operator has an accepted alternative

procedure, the accepted alternative procedure can be used. When the words "in

accordance with" are included in the instruction, the procedure in the Boeing document

must be used.

10. If it is necessary to remove more parts for access, you can remove those parts. If

you can get access without removing identified parts, it is not necessary to remove

all of the identified parts. Jacking and shoring limitations must be observed.

11. Where the work instructions include installation of a kept part, a new or serviceable

part with the same part number can be installed as an alternative to the kept part.

12. This service bulletin includes functional test procedures for the systems changed by

this service bulletin. More functional tests can possibly be necessary in accordance

with standard maintenance practices because of interruption to other airplane systems.

13. Use of colors in Figures is based on guidance from the ATA e-Business Program

(ATA) iSpec 2200.

14. The compliance times for the actions in Paragraph 3.B., WORK INSTRUCTIONS

are in Paragraph 1.E., Compliance.

15. Some steps in the Work Instructions are labeled as Required for Compliance (RC).

If this service bulletin is mandated by an Airworthiness Directive (AD), then the steps

labeled as RC, including sub-steps under an RC step and any figures identified in

an RC step, must be done to comply with the AD. An Alternative Method of

Compliance (AMOC) is required for any deviations to RC steps, including sub-steps

and identified figures. Steps not labeled as RC may be deviated from using accepted

methods in accordance with the operator's maintenance or inspection program without

obtaining approval of an AMOC. This is provided that the RC steps, including

sub-steps and identified figures, can still be done as specified, and the airplane can

be put back in an airworthy condition.

B. WORK INSTRUCTIONS

1. Install downlock pins in all landing gears. Refer to 737-600/700/800/900 AMM 32-00-01 as an

accepted procedure.

2. Put chocks around the tires of all landing gears.

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ALERT ALERT
3. Remove electrical power from the airplane. Refer to 737-600/700/800/900 AMM 24-22-00 as an

accepted procedure.

4. Get access to the right side of the Main Landing Gear wheel well in the forward bulkhead area.

5. RC - Do a Detailed Inspection of the wire bundles and hydraulic tube for damage, in accordance

with the applicable figure below.

a. Group 1:

FIGURE 1

b. Group 2:

FIGURE 2

6. RC - If any wire bundles are found to be damaged, repair them. Refer to SWPM 20-10-13 as an

accepted procedure.

7. If any of the wire bundles were repaired, record all wire numbers repaired to refer to for system

tests.

8. If the hydraulic tube is found to be damaged:

a. Remove pressure from hydraulic systems A, B and Standby. Refer to 737-600/700/800/900

AMM 29-09-00 as an accepted procedure.

b. RC - Replace or repair the damaged hydraulic tube. Refer to 737-600/700/800/900 AMM

20-10-51 as an accepted procedure.

9. RC - Install clamps and an optional spacer between the wire bundles and hydraulic tube in

accordance with the applicable figure below.

a. Group 1:

FIGURE 3

b. Group 2:

FIGURE 4

10. If you replaced or repaired the hydraulic tube, service the hydraulic reservoir. Refer to

737-600/700/800/900 AMM 12-12-00 as an accepted procedure.

11. Restore the electrical power to the airplane. Refer to 737-600/700/800/900 AMM 24-22-00 as an

accepted procedure.

12. If you replaced or repaired the hydraulic tube. restore pressure to hydraulic systems A, B and

Standby. Refer to 737-600/700/800/900 AMM 29-11-00 for systems A and B, and

737-600/700/800/900 AMM 29-21-00 for the standby hydraulic system as accepted procedures.

13. If you replaced or repaired the hydraulic tube, check for leaks at the hydraulic tube connections.

Refer to 737-600/700/800/900 AMM 20-10-51 as an accepted procedure.

14. If any of the wire bundles were repaired, do the tests that follow.

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ALERT ALERT
NOTE: The table that follows includes tests for all wires in W6128 and W8122. Operators only

need to test the systems that were disturbed as a result of wire repairs.

a. If wire bundle W6128 was repaired, do the tests that follow.

Test - Refer to AMM

Chapter as an Accepted

Procedure

Applicable Wire Repaired System Name Refer to WDM Chapter

737-600/700/800/900

AMM 33-42-02 Retractable Landing Light

Assembly Replacement.

(a)

737-600/700/800/900

WDM 33-42-11

0001 thru 0006 Retractable Landing Lights

737-600/700/800/900

AMM 29-11-21 Electric

Motor Driven Pump

(EMDP) Test.

737-600/700/800/900

WDM 29-11-12

Hydraulic Systems A and

B Electric Motor Driven

Pump (EMDP)

0501, 0503 thru 0506 and

YAAF

737-600/700/800/900

AMM 29-32-00 Case Drain

Overheat Switch Test

737-600/700/800/900

WDM 29-34-11

System A Pump Overheat

Warning System (ELEC 2)

0502 and 0507 thru 0509

737-600/700/800/900

AMM 28-21-00 Pressure

Fueling System Test.

737-600/700/800/900

WDM 28-21-11

6011 Pressure Fueling System

(a) It is only necessary to do the test of the existing retractable landing lights.

b. If wire bundle W8122 was repaired, do the tests that follow.

Test - Refer to AMM

Chapter as an Accepted Procedure

Applicable Wire Re- System Name Refer to WDM Chapter

paired

737-600/700/800/900

AMM 27-09-61 Low

Pressure Warning

Switch Test.

737-600/700/800/900

WDM 27-23-14

Flight Control Low

Pressure Indication

0501 and 0502

737-600/700/800/900

AMM 29-22-00 Power

Transfer Unit (PTU)

System Test.

737-600/700/800/900

WDM 29-25-11

Hydraulic Power Transfer Unit (PTU) System0503 and 0504

737-600/700/800/900

AMM 29-22-31 Power

Transfer Unit (PTU)

Control Valve Installation Test.

737-600/700/800/900

WDM 29-23-11

Landing Gear Transfer

Valve Control

0505 thru 0510

737-600/700/800/900

AMM 27-09-31 Flight

Controls Shutoff Valve

Test.

737-600/700/800/900

WDM 27-23-11

Flight Control System

B Shutoff Valve

0511 thru 0513

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ALERT ALERT
Test - Refer to AMM

Chapter as an Accepted Procedure

Applicable Wire Re- System Name Refer to WDM Chapter

paired

737-600/700/800/900

AMM 27-81-00 Leading

Edge Uncommanded

Motion Protection Test.

737-600/700/800/900

WDM 27-81-51

Leading Edge Uncommanded Motion Protection Shutoff Valve0515, 0516 and YAAF

737-600/700/800/900

AMM 27-09-61 Low

Pressure Warning

Switch Test.

737-600/700/800/900

WDM 31-31-15 or 737-

600/700/800/900 WDM

27-23-14 (a)

Flight Control Low

Pressure Indication

0530

737-600/700/800/900

AMM 27-61-12 Spoiler

Shutoff Valve Test.

737-600/700/800/900

WDM 27-61-11

Spoiler Shutoff Valve

System B

0542 thru 0544

737-600/700/800/900

AMM 31-51-00 Takeoff

Warning System Test.

737-600/700/800/900

WDM 31-53-11

Aural Takeoff Warning

System

3201B,3201R and

3201Y

(a) Refer to the Wiring Diagram Manual for the applicability of Wire 0530.

15. Remove the downlock pins from all landing gears, Refer to 737-600/700/800/900 AMM 32-00-01

as an accepted procedure.

16. Remove chocks from around the tires of all landing gears.

17. Put the airplane back to a serviceable condition.

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
This Figure applies only to: Group 1.

FIGURE 1: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - HYDRAULIC

TUBE AND WIRE BUNDLES - INSPECTION

(SHEET 1 OF 2)

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY

numbers shown below are the number of parts necessary for each airplane.

Step Task Name Identification Qty More Data

In the area shown,

do a Detailed Inspection for damage. Refer to SWPM 20-10-

13 as an accepted

procedure.

1 Inspect WIRE BUNDLES W6128 AND W8122 1

In the area shown,

do a Detailed Inspection for damage. Refer to 737-

600/700/800/900

AMM 20-10-51 as

an accepted procedure.

2 Inspect HYDRAULIC TUBE 272A4451-56 1

FIGURE 1: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - HYDRAULIC

TUBE AND WIRE BUNDLES - INSPECTION

(SHEET 2 OF 2)

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ALERT ALERT
This Figure applies only to: Group 2.

FIGURE 2: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - HYDRAULIC

TUBE AND WIRE BUNDLES - INSPECTION

(SHEET 1 OF 2)

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY

numbers shown below are the number of parts necessary for each airplane.

Step Task Name Identification Qty More Data

In the area shown,

do a Detailed Inspection for damage. Refer to SWPM 20-10-

13 as an accepted

procedure.

1 Inspect WIRE BUNDLES W6128 AND W8122 1

In the area shown,

do a Detailed Inspection for damage. Refer to 737-

600/700/800/900

AMM 20-10-51 as

an accepted procedure.

2 Inspect HYDRAULIC TUBE 272A4451-1044 1

FIGURE 2: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - HYDRAULIC

TUBE AND WIRE BUNDLES - INSPECTION

(SHEET 2 OF 2)

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ALERT ALERT
This Figure applies only to: Group 1.

FIGURE 3: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - CLAMPS -

INSTALLATION

(SHEET 1 OF 3)

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ALERT ALERT
The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY

numbers shown below are the number of parts necessary for each airplane.

Step Task Name Identification Qty More Data

1 Loosen CLAMPS - 2

2 Adjust WIRE BUNDLES W6128 AND W8122 1 (a)

On wire bundles

W6128 and W8122

as shown. (b)

BACC10JU105 1

(BACC10GU105 or

BACC10JU105P optional)

WIRE BUNDLE

CLAMP

3 Install (New)

On hydraulic tube

P/N 272A4451-56 as

shown.

4 Install (New) CLAMP,LOOP AS21919WCE10 1

SPACERS FOR RIV- NAS42DD6-16FC 1 (c)

ETS

5 Install (New)

6 Install (New) SCREW BACS12GU3K8 1 (d)

Install (New) WASHER NAS1149D0316J 1

Loosely to let wire

bundles be adjusted.

Install (New) NUT BACN10JC3CD 1

7 Torque NUT BACN10JC3CD 1 35 in-lb.

8 Tighten CLAMPS - 2

(a) Adjust wire bundle slack outboard, towards the hydraulic tube, to install new clamps, if necessary.

(b) If the listed wire bundle clamp does not fit correctly, use wire bundle clamp BACC10JU104 (BACC10GU104

or BACC10JU104P optional) or BACC10JU106 (BACC10GU106 or BACC10JU106P optional).

(c) Installation of a spacer is optional. As an alternative, make a selection of a spacer from the extra parts

table below. Make sure that the distance between the wire bundles and hydraulic tube is 0.5 inch (1.3

cm) minimum.

(d) As an alternative, make a selection of a screw from the extra parts table below.

The parts shown in the table below are provided as extra parts for this figure.

Name Identification Qty More Data

BACC10JU104 1

(BACC10GU104 or

BACC10JU104P optional)

WIRE BUNDLE CLAMP

BACC10JU106 1

(BACC10GU106 or

BACC10JU106P optional)

WIRE BUNDLE CLAMP

SCREW BACS12GU3K12 1

FIGURE 3: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - CLAMPS -

INSTALLATION

(SHEET 2 OF 3)

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ALERT ALERT
Name Identification Qty More Data

SCREW BACS12GU3K16 1

SCREW BACS12GU3K20 1

SCREW BACS12GU3K24 1

SCREW BACS12GU3K28 1

SCREW BACS12GU3K32 1

SCREW BACS12GU3K36 1

SPACERS FOR RIVETS NAS42DD6-32FC 1

SPACERS FOR RIVETS NAS42DD6-48FC 1

SPACERS FOR RIVETS NAS42DD6-64FC 1

SPACERS FOR RIVETS NAS42DD6-80FC 1

SPACERS FOR RIVETS NAS42DD6-96FC 1

SPACERS FOR RIVETS NAS42DD6-112FC 1

SPACERS FOR RIVETS NAS42DD6-128FC 1

FIGURE 3: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - CLAMPS -

INSTALLATION

(SHEET 3 OF 3)

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ALERT ALERT
This Figure applies only to: Group 2.

FIGURE 4: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - CLAMPS -

INSTALLATION

(SHEET 1 OF 3)

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BOEING SERVICE BULLETIN 737-29A1119

ALERT ALERT
The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY

numbers shown below are the number of parts necessary for each airplane.

Step Task Name Identification Qty More Data

1 Loosen CLAMPS - 2

2 Adjust WIRE BUNDLES W6128 AND W8122 1 (a)

On wire bundles

W6128 and W8122

as shown. (b)

BACC10JU105 1

(BACC10GU105 or

BACC10JU105P optional)

WIRE BUNDLE

CLAMP

3 Install (New)

On hydraulic tube

P/N 272A4451-1044

as shown.

4 Install (New) CLAMP,LOOP AS21919WCE10 1

SPACERS FOR RIV- NAS42DD6-16FC 1 (c)

ETS

5 Install (New)

6 Install (New) SCREW BACS12GU3K8 1 (d)

Install (New) WASHER NAS1149D0316J 1

Loosely to let wire

bundles be adjusted.

Install (New) NUT BACN10JC3CD 1

7 Torque NUT BACN10JC3CD 1 35 in-lb.

8 Tighten CLAMPS - 2

(a) Adjust wire bundle slack outboard, towards the hydraulic tube, to install new clamps, if necessary.

(b) If the listed wire bundle clamp does not fit correctly, use wire bundle clamp BACC10JU104 (BACC10GU104

or BACC10JU104P optional) or BACC10JU106 (BACC10GU106 or BACC10JU106P optional).

(c) Installation of a spacer is optional. As an alternative, make a selection of a spacer from the extra parts

table below. Make sure that the distance between the wire bundles and hydraulic tube is 0.5 inch (1.3

cm) minimum.

(d) As an alternative, make a selection of a screw from the extra parts table below.

The parts shown in the table below are provided as extra parts for this figure.

Name Identification Qty More Data

BACC10JU104 1

(BACC10GU104 or

BACC10JU104P optional)

WIRE BUNDLE CLAMP

BACC10JU106 1

(BACC10GU106 or

BACC10JU106P optional)

WIRE BUNDLE CLAMP

SCREW BACS12GU3K12 1

FIGURE 4: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - CLAMPS -

INSTALLATION

(SHEET 2 OF 3)

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ALERT ALERT
Name Identification Qty More Data

SCREW BACS12GU3K16 1

SCREW BACS12GU3K20 1

SCREW BACS12GU3K24 1

SCREW BACS12GU3K28 1

SCREW BACS12GU3K32 1

SCREW BACS12GU3K36 1

SPACERS FOR RIVETS NAS42DD6-32FC 1

SPACERS FOR RIVETS NAS42DD6-48FC 1

SPACERS FOR RIVETS NAS42DD6-64FC 1

SPACERS FOR RIVETS NAS42DD6-80FC 1

SPACERS FOR RIVETS NAS42DD6-96FC 1

SPACERS FOR RIVETS NAS42DD6-112FC 1

SPACERS FOR RIVETS NAS42DD6-128FC 1

FIGURE 4: RIGHT MAIN WHEEL WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - CLAMPS -

INSTALLATION

(SHEET 3 OF 3)

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ALERT ALERT
APPENDIX A: PART DEMAND INTENT

(SHEET 1 OF 1)

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ALERT ALERT