Commercial 

Airplanes 737

Service Bulletin

ALERT

Number: 737-29A1119

Original Issue: August 04, 2015

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Unpublished Work.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.

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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

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BLANK PAGE
Table of Contents

Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

E. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

2. Data Supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . . 30

K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

M. Software Accomplishment Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

A. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

C. Parts Necessary for Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

2. Parts and Materials Supplied by the Operator . . . . . . . . . . . . . . . . . . . . . . . . 33

3. Parts Modified and Reidentified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4. Parts Removed and Not Replaced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 34

3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

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

TUBE AND WIRE BUNDLES - INSPECTION [Group 1] . . . . . . . . . . . . . . . . . . . 41

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

TUBE AND WIRE BUNDLES - INSPECTION [Group 2] . . . . . . . . . . . . . . . . . . . 43

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

INSTALLATION [Group 1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

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

INSTALLATION [Group 2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 1: RIGHT MAIN WHEEL

WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - HYDRAULIC TUBE AND WIRE

BUNDLES - INSPECTION AND CLAMPS INSTALLATION . . . . . . . . . . . . . . . . . 51

APPENDIX B: PART DEMAND INTENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Export Controlled ECCN: 9E991 - BOEING

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BLANK PAGE
Commercial 

Airplanes 737

Service Bulletin

ALERT

Summary Number: 737-29A1119

Original Issue: August 04, 2015

ATA System: 2911

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

Clamp Installation

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

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.

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

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Planning Data Affected Reference

Paragraph 1.E., Compliance and Paragraph

1.F., Approval

AD Related No

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 chafing 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.

MATERIAL INFORMATION

Boeing Supplied Kits/Parts.

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

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

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

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BLANK PAGE
Commercial 

Airplanes 737

Service Bulletin

ALERT

Number: 737-29A1119

Original Issue: August 04, 2015

ATA System: 2911

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

Clamp Installation

THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH

1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO

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

THE NEW OWNER.

1. PLANNING INFORMATION

A. Effectivity

1. Airplanes

Refer to Service Bulletin Index 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

YA221 1

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Variable Number Group

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

YB671 - YB672 1

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Variable Number Group

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

YC949 - YC951 1

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Variable Number Group

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

YF021 - YF040 1

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Variable Number Group

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

YF836 - YF837 1

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Variable Number Group

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

YH206 - YH207 1

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Variable Number Group

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

YJ961 2

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Variable Number Group

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

YK511 - YK516 1

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Variable Number Group

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

YK993 - YK999 2

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Variable Number Group

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

YL595 - YL598 2

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ALERT ALERT
Variable Number Group

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

YM394 - YM399 2

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ALERT ALERT
Variable Number Group

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

YN501 2

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Variable Number Group

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

YR051 - YR087 2

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ALERT ALERT
Variable Number Group

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

YR601 - YR605 2

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Variable Number Group

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

YS401 2

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Variable Number Group

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

YT101 - YT109 2

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Variable Number Group

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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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.

D. Description

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

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

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ALERT ALERT
Group 2:

Affected Maintenance Zones

Model Zone

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

737-900ER

E. Compliance

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

24 months of the service bulletin release date.

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

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

TUBE AND WIRE BUNDLES - INSPECTION AND CLAMPS INSTALLATION

Repeat Interval

(Not to Exceed)

Condition Action Compliance Time

Within 24 months -

after the original issue date of this

service bulletin.

Do PART 1: WIRE BUNDLES AND HYDRAULIC

TUBE - DETAILED INSPECTION

All Airplanes

Before further -

flight.

CONDITION 1 (ACTION

1): Repair the wire bundles.

CONDITION 1: DAMAGE

TO WIRE BUNDLES

FOUND DURING DETAILED INSPECTION Before further -

flight.

CONDITION 1 (ACTION

2): Do PART 2: WIRE

BUNDLES AND HYDRAULIC TUBE -

CLAMPS INSTALLATION

Before further -

flight.

CONDITION 2 (ACTION

1): Repair or replace the

hydraulic tube.

CONDITION 2: DAMAGE

TO HYDRAULIC TUBE

FOUND DURING DETAILED INSPECTION Before further -

flight.

CONDITION 2 (ACTION

2): Do PART 2: WIRE

BUNDLES AND HYDRAULIC TUBE -

CLAMPS INSTALLATION

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

TUBE AND WIRE BUNDLES - INSPECTION AND CLAMPS INSTALLATION

Repeat Interval

(Not to Exceed)

Condition Action Compliance Time

Before further -

flight.

CONDITION 3 (ACTION

1): Repair the wire bundles.

CONDITION 3: DAMAGE

TO WIRE BUNDLES AND

HYDRAULIC TUBE

FOUND DURING DETAILED INSPECTION Before further -

flight.

CONDITION 3 (ACTION

2): Repair or replace the

hydraulic tube.

Before further -

flight.

CONDITION 3 (ACTION

3): Do PART 2: WIRE

BUNDLES AND HYDRAULIC TUBE -

CLAMPS INSTALLATION

Before further -

flight.

Do PART 2: WIRE BUNDLES AND HYDRAULIC

TUBE - CLAMPS INSTALLATION

CONDITION 4: NO DAMAGE IS FOUND DURING

DETAILED INSPECTION

A logic diagram showing compliance tasks and compliance times is included as an aid in APPENDIX

A.

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.

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

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ALERT ALERT
• 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.

J. References

1. Existing Data:

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

b. Service Bulletin Index D6-19567

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

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

e. 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, 33-42-00

f. 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

g. 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 29-11

2. Damage Tolerance Based Structural Inspections:

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 9.00

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 B of this service bulletin to

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

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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 -

AS21919WCE06 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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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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ALERT ALERT
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. When more than one OPTION is given for a CONDITION, do only one of the OPTION

numbers. When more than one ACTION is given for a CONDITION number or an

OPTION number, do all of the ACTION numbers for that CONDITION number or

OPTION number.

9. 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.

10. 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.

11. Refer to APPENDIX A for logic diagram(s). Logic diagrams are provided as an aid

only. Information contained in Paragraph 1.E., Compliance is the primary source for

compliance times. Information in Paragraph 3.B., Work Instructions is the primary

source for tasks required for compliance.

12. 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.

13. 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.

14. 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.

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

(ATA) iSpec 2200.

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

are in Paragraph 1.E., Compliance.

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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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. Do PART 1: WIRE BUNDLES AND HYDRAULIC TUBE - DETAILED INSPECTION.

a. CONDITION 1: DAMAGE TO WIRE BUNDLES FOUND DURING DETAILED INSPECTION.

(1) CONDITION 1 (ACTION 1): Repair the damaged wire bundles W6128 and W8122. Refer

to SWPM 20-10-13 as an accepted procedure. Record all wire numbers repaired to refer

to for system tests.

(2) CONDITION 1 (ACTION 2): Do PART 2: WIRE BUNDLES AND HYDRAULIC TUBE -

CLAMPS INSTALLATION.

b. CONDITION 2: DAMAGE TO HYDRAULIC TUBE FOUND DURING DETAILED INSPECTION.

(1) CONDITION 2 (ACTION 1):

(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) Group 1:

Replace or repair damaged hydraulic tube P/N 272A4451-56. Refer to

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

(c) Group 2:

Replace or repair damaged hydraulic tube P/N 272A4451-1044. Refer to

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

(2) CONDITION 2 (ACTION 2): Do PART 2: WIRE BUNDLES AND HYDRAULIC TUBE -

CLAMPS INSTALLATION.

c. CONDITION 3: DAMAGE TO WIRE BUNDLES AND HYDRAULIC TUBE FOUND DURING

INSPECTION.

(1) CONDITION 3 (ACTION 1): Repair the damaged wire bundles W6128 and W8122. Refer

to SWPM 20-10-13 as an accepted procedure. Record all wire numbers repaired to refer

to for system tests.

(2) CONDITION 3 (ACTION 2):

(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) Group 1:

Replace or repair damaged hydraulic tube P/N 272A4451-56. Refer to

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

(c) Group 2:

Replace or repair damaged hydraulic tube P/N 272A4451-1044. Refer to

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

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ALERT ALERT
(3) CONDITION 3 (ACTION 3): Do PART 2: WIRE BUNDLES AND HYDRAULIC TUBE -

CLAMPS INSTALLATION.

d. CONDITION 4: NO DAMAGE IS FOUND DURING DETAILED INSPECTION.

(1) CONDITION 4 (ACTION 1): Do PART 2: WIRE BUNDLES AND HYDRAULIC TUBE -

CLAMPS INSTALLATION.

6. 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.

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

accepted procedure.

8. 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.

9. 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.

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

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 33-42-00 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.

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ALERT ALERT
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

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.

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

as an accepted procedure.

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

13. Put the airplane back to a serviceable condition.

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ALERT ALERT
PART 1: WIRE BUNDLES AND HYDRAULIC TUBE - DETAILED INSPECTION

1. Group 1:

Do a Detailed Inspection of the wire bundles and hydraulic tube for damage in accordance with

FIGURE 1.

2. Group 2:

Do a Detailed Inspection of the wire bundles and hydraulic tube for damage in accordance with

FIGURE 2.

PART 2: WIRE BUNDLES AND HYDRAULIC TUBE - CLAMPS INSTALLATION

1. Group 1:

Install clamps and an optional spacer between the wire bundles and hydraulic tube in accordance

with FIGURE 3.

2. Group 2:

Install clamps and an optional spacer between the wire bundles and hydraulic tube in accordance

with FIGURE 4.

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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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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 chafing damage. Refer to 737-

600/700/800/900

AMM 20-10-13 as

an accepted procedure.

1 Inspect WIRE BUNDLES W6128 AND W8122 1

In the area shown,

do a Detailed Inspection for chafing or

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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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 737-

600/700/800/900

AMM 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 (a)

2 Adjust WIRE BUNDLES W6128 AND W8122 1 (a)

On wire bundles

W6128 and

W8122 as shown.

(b)

BACC10JU105 1

(BACC10GU105 or

BACC10JU105P optional)

3 Install (New) WIRE BUNDLE CLAMP

On hydraulic tube

P/N 272A4451-56

as shown.

4 Install (New) CLAMP,LOOP AS21919WCE06 1

5 Install (New) SPACERS FOR RIVETS NAS42DD6-16FC 1 (c)

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) Loosen existing clamps and 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 BACCGU106P 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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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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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 (a)

2 Adjust WIRE BUNDLES W6128 AND W8122 1 (a)

On wire bundles

W6128 and

W8122 as shown.

(b)

BACC10JU105 1

(BACC10GU105 or

BACC10JU105P optional)

3 Install (New) WIRE BUNDLE CLAMP

On hydraulic tube

P/N 272A4451-

1044 as shown.

4 Install (New) CLAMP,LOOP AS21919WCE06 1

5 Install (New) SPACERS FOR RIVETS NAS42DD6-16FC 1 (c)

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) Loosen existing clamps and 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 BACCGU106P 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
Logic diagrams are provided as an aid only. Information contained in Paragraph 1.E., Compliance is the primary

source for compliance times. Information contained in Paragraph 3.B., Work Instructions is the primary source

for tasks required for compliance.

1. The table below gives the description for the parts and conditions called out in the logic diagrams.

Title Description

PART 1 WIRE BUNDLES AND HYDRAULIC TUBE - DETAILED INSPECTION

PART 2 WIRE BUNDLES AND HYDRAULIC TUBE - CLAMPS INSTALLATION

CONDITION 1 DAMAGE TO WIRE BUNDLES FOUND DURING DETAILED INSPECTION

CONDITION 2 DAMAGE TO HYDRAULIC TUBE FOUND DURING DETAILED INSPECTION

DAMAGE TO WIRE BUNDLES AND HYDRAULIC TUBE FOUND DURING

DETAILED INSPECTION

CONDITION 3

CONDITION 4 NO DAMAGE IS FOUND DURING DETAILED INSPECTION

APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 1: RIGHT MAIN WHEEL

WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - HYDRAULIC TUBE AND WIRE BUNDLES -

INSPECTION AND CLAMPS INSTALLATION

(SHEET 1 OF 2)

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ALERT ALERT
APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 1: RIGHT MAIN WHEEL

WELL - BELOW ELECTRIC MOTOR DRIVEN PUMP 'B' - HYDRAULIC TUBE AND WIRE BUNDLES -

INSPECTION AND CLAMPS INSTALLATION

(SHEET 2 OF 2)

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APPENDIX B: PART DEMAND INTENT

(SHEET 1 OF 1)

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ALERT ALERT