Commercial 

Airplanes DC10

Service Bulletin

ALERT

Number: DC10-32A260

Original Issue: September 30, 2011

ATA System: 3200

SUBJECT: LANDING GEAR - Landing Gear - Replaces Left and Right Main Landing Gear Upper

Torque Link Bolt

Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15

CFR 730-774). An export license may be required before it is used for development, production or use by foreign

persons from specific countries. The controller of this data has the individual responsibility to abide by all export

laws.

ECCN: 9E991

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Copyright © 2011 The Boeing Company

Unpublished Work - All Rights Reserved

Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable

subject matter. Boeing also claims copyright in this document as a compilation and/or collective work.

This document includes proprietary information owned by The Boeing Company and/or one or more third parties.

Treatment of the document and the information it contains is governed by contract with Boeing. For more

information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124.

Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner,

BBJ, DC-8, DC-9, DC-10, KC-10, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and the

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BLANK PAGE
Table of Contents

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

1. PLANNING INFORMATION ........................................ 7

A. Effectivity ................................................ 7

1. Airplanes ............................................. 7

2. Spares Affected ......................................... 8

B. Concurrent Requirements ....................................... 8

C. Reason ................................................. 8

D. Description ............................................... 9

E. Compliance .............................................. 9

F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1. Existing Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2. Data supplied with this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3. Installation Drawings Used in the Preparation of this Service Bulletin . . . . . . . . . . . . 11

K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

A. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

C. Parts Necessary For Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2. Parts and Materials Supplied by the Operator . . . . . . . . . . . . . . . . . . . . . . . . 13

3. Parts Modified and Reidentified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4. Parts Removed and Not Replaced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 14

3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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Commercial 

Airplanes DC10

Service Bulletin

ALERT

Summary Number: DC10-32A260

Original Issue: September 30, 2011

ATA System: 3200

SUBJECT: LANDING GEAR - Landing Gear - Replaces Left and Right Main Landing Gear Upper

Torque Link Bolt

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

In 1999, Boeing approved the fabrication of part number ARG7063-503 Main Landing Gear (MLG) Upper Torque

Link Bolt from bar stock with a machined head in lieu of an upset forged head. Between 2000 and 2006 Boeing

received 28 bolts that were fabricated from bar stock and a machined head. The bolts are a Safe Life Limit (SLL)

item and are required to be serialized for traceability. Boeing has determined that this substitution reduces the

SLL of the bolt from 47,300 flight cycles to 6,590 flight cycles. As a result of the reduced SLL, Boeing has ceased

allowing the manufacture of the bolt from bar stock and a machined head. This service bulletin is being issued

to advise affected operators of the bolt SLL reduction and allow their processes to monitor and replace the bolts

prior to reaching the SLL. If not corrected, a bolt fabricated from bar stock and a machined head exceeding

6,590 flight cycle SLL could fail resulting in MLG damage and potentially cause significant damage to the airplane.

ACTION

Refer to Paragraph 1.D., Description.

EFFECTIVITY

DC-10 and MD-10 Airplane(s). Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplane(s).

COMPLIANCE

The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service

bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin

mandatory.

Refer to Paragraph 1.E., Compliance.

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INDUSTRY SUPPORT INFORMATION

Boeing warranty remedies are not available for the information provided in this service bulletin.

MANPOWER

Refer to Paragraph 1.G., Manpower.

MATERIAL INFORMATION

None.

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BOEING SERVICE BULLETIN DC10-32A260

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Commercial 

Airplanes DC10

Service Bulletin

ALERT

Number: DC10-32A260

Original Issue: September 30, 2011

ATA System: 3200

SUBJECT: LANDING GEAR - Landing Gear - Replaces Left and Right Main Landing Gear Upper

Torque Link Bolt

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

This service bulletin is for the airplanes shown below.

GROUP CONFIGURATION DESCRIPTION

1 - Inspect Left and Right Main Landing Gear Upper Torque Link Bolt

Airplane Models:

DC-10-10, MD-10-10F

Fuselage Num- Group

ber

32 1

39 1

55 1

86 1

89 1

119 1

139 1

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Fuselage Num- Group

ber

142 1

198 1

207 - 209 1

250 1

273 1

285 1

319 1

353 1

379 1

2. Spares Affected

Examine your spares supply for part number ARG7063-503 Main Landing Gear (MLG) Upper

Torque Link Bolt with the serial numbers that follow. If any parts are found, a reduced Safe Life

Limit threshold of 6,590 flight cycle applies if installed.

Manufacturer Serial Number

CPI0001, CPI0002, CPI0003, CPI0004, CPI0005,

CPI0006, CPI0007, CPI0008, CPI0009, CPI0010,

CPI0011, CPI0012, CPI0013, CPI0014, and CPI0015

Castle Precision Industries

0001, 0002, 0003, 0004, 0005, 0006, 0007, 0008, 0010,

0011, 0012, 0013 and 0014

Tuffer Manufacturing

B. Concurrent Requirements

None.

C. Reason

In 1999, Boeing approved the fabrication of part number ARG7063-503 Main Landing Gear (MLG)

Upper Torque Link Bolt from bar stock with a machined head in lieu of an upset forged head. Between

2000 and 2006 Boeing received 28 bolts that were fabricated from bar stock and a machined head.

The bolts are a Safe Life Limit (SLL) item and are required to be serialized for traceability. Boeing has

determined that this substitution reduces the SLL of the bolt from 47,300 flight cycles to 6,590 flight

cycles. As a result of the reduced SLL, Boeing has ceased allowing the manufacture of the bolt from

bar stock and a machined head. This service bulletin is being issued to advise affected operators of

the bolt SLL reduction and allow their processes to monitor and replace the bolts prior to reaching the

SLL. If not corrected, a bolt fabricated from bar stock and a machined head exceeding 6,590 flight

cycle SLL could fail resulting in MLG damage and potentially cause significant damage to the airplane.

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D. Description

This service bulletin replaces Castle Precision Industries and Tuffer Manufacturing Main Landing Gear

(MLG) Upper Torque Link Bolt part number ARG7063-503 on the left and right MLG fabricated from

bar stock and a machined head as follows:

Manufacturer Serial Number

CPI0001, CPI0002, CPI0003, CPI0004, CPI0005,

CPI0006, CPI0007, CPI0008, CPI0009, CPI0010,

CPI0011, CPI0012, CPI0013, CPI0014, and CPI0015

Castle Precision Industries

0001, 0002, 0003, 0004, 0005, 0006, 0007, 0008, 0010,

0011, 0012, 0013 and 0014

Tuffer Manufacturing

Option 1

1. Replaces bolt(s) with new or serviceable part number ARG7063-503.

NOTE: Serviceable part number must be within its Safe Life Limit (SLL) and can not have one

of the aforementioned serial numbers.

Option 2

1. Replaces bolt(s) with new or serviceable part number ARG7323-1 and related hardware.

Option 3

1. Monitors bolt(s) SLL and does Option 1 or Option 2 at threshold specified in Paragraph 1.E.,

Compliance.

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

Affected Maintenance Zones

Model Zone

DC-10-10, MD-10-10F 734, 744

E. Compliance

The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to

this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this

service bulletin mandatory.

Accomplish the required action(s), based on the applicable condition(s), in Table(s) 1, in accordance

with Paragraph 3. Accomplishment Instructions.

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ALERT ALERT
Table 1: Replace Upper MLG Torque Link Bolts fabricated from bar stock and a machined head.

Repeat Interval

(Not to Exceed)

Compliance Time (Whichever

Occurs Later)

Condition Action

Before 6,590 -

flight cycles

from installation.

Before further

flight.

Replace bolt fabricated

from bar stock and a machined head.

All Airplanes

F. Approval

MD-10 Airplanes:

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. 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.

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.

DC-10 Airplanes:

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.

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 service bulletin 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.

Task Number of Persons Task Hours Elapsed Hours

Replace 2 2.0 1.0

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Task Number of Persons Task Hours Elapsed Hours

TOTAL FOR EACH AIRPLANE 2.0 1.0

H. Weight and Balance Changes

Option 1

None.

Option 2

Moment Change

(MEW) IN.-LBS

Mfr's Empty

Weight (MEW)

LBS

Approximate StaAirplane tion (Inches)

DC-10-10, MD-10- +1442.0 +8.9 +12833.8

10F

I. Electrical Load Data

Not changed.

J. References

1. Existing Data

a. DC-10, MD-10 Aircraft Maintenance Manual (AMM) 32-00-00, 32-11-02.

2. Data supplied with this Service Bulletin

None.

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

None.

K. Publications Affected

1. Publications:

None.

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.

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BLANK PAGE
2. MATERIAL INFORMATION

A. Material - Price and Availability

The operator can supply the parts and materials shown in Paragraph 2.C.2., Parts and Materials

Supplied by the Operator . As an alternative, operators can purchase the parts from Boeing Spares.

This service bulletin does not show the Boeing price and supply data.

Operators that identify any of the ARG7063-503 serial numbers affected by this service bulletin should

contact Boeing Spares for instructions.

B. Industry Support Information

Boeing warranty remedies are not available for the information provided in this service bulletin.

C. Parts Necessary For Each Airplane

1. Kits/Parts

None.

2. Parts and Materials Supplied by the Operator

Option 1

Part Number / QTY Name Existing Part Number Notes

Specification

As Re- Upper MLG Torque Link Bolt ARG7063-503 (a)

quired

ARG7063-503

(a) ARG7063-503 has a Safe Life Limit of 47,300 flight cycles when new.

Option 2

Part Number / QTY Name Existing Part Number Notes

Specification

As Re- Upper MLG Torque Link Bolt ARG7063-503 (a)

quired

ARG7323-1

As Re- Nut ARG7071-1

quired

ARG7383-1

As Re- Bolt NAS6404U15

quired

NAS6404U24

As Re- Nut MS21042L4

quired

MS21042L4

As Re- Washer NAS1252-416H

quired

ARG7382-1

(a) ARG7323-1 Bolt is an alternate part for ARG7063-503 Bolt. ARG7323-1 Bolt has an unlimited Safe Life

Limit when new.

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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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3. ACCOMPLISHMENT INSTRUCTIONS

A. GENERAL INFORMATION

WARNING: IF ELECTRICAL POWER IS APPLIED TO THE AIRPLANE, MAKE SURE YOU OBEY

ALL PRECAUTIONS WHILE YOU DO WORK. IF YOU DO NOT OBEY THE

PRECAUTIONS, DEATH OR INJURY TO PERSONS, AND DAMAGE TO THE AIRPLANE

CAN OCCUR.

CAUTION: ELECTRICALLY GROUND THE AIRPLANE. THIS WILL HELP TO PREVENT DAMAGE

TO THE AIRPLANE OR EQUIPMENT.

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. Equivalent parts are listed in the AEPL, Drawing 7595071.

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

4. 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.

B. WORK INSTRUCTIONS

1. Replace Castle Precision Industries and Tuffer Manufacturing Main Landing Gear (MLG) Upper

Torque Link Bolt part number ARG7063-503 on the left and right MLG fabricated from bar stock

and a machined head as follows:

Manufacturer Serial Number

CPI0001, CPI0002, CPI0003, CPI0004, CPI0005,

CPI0006, CPI0007, CPI0008, CPI0009, CPI0010,

CPI0011, CPI0012, CPI0013, CPI0014, and CPI0015

Castle Precision Industries

0001, 0002, 0003, 0004, 0005, 0006, 0007, 0008, 0010,

0011, 0012, 0013 and 0014

Tuffer Manufacturing

Option 1

Replace bolt(s) with new or serviceable part number ARG7063-503. Refer to DC-10, MD-10 AMM

32-11-02 as an accepted procedure.

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NOTE: Serviceable part number must be within its Safe Life Limit (SLL) and can not have one

of the aforementioned serial numbers.

Option 2

a) Remove the parts on the table that follows: Refer to DC-10, MD-10 AMM 32-11-02 as an

accepted procedure.

Part Number / Specification QTY Name

ARG7063-503 As Required Upper MLG Torque Link Bolt

ARG7071-1 As Required Nut

NAS6404U15 As Required Bolt

MS21042L4 As Required Nut

NAS1252-416H As Required Washer

b) Install the parts on the table that follows: Refer to DC-10, MD-10 AMM 32-11-02 as an accepted

procedure.

Part Number / Specification QTY Name Notes

ARG7323-1 As Required Upper MLG Torque Link Bolt (a)

ARG7383-1 As Required Nut

NAS6404U24 As Required Bolt

MS21042L4 As Required Nut

ARG7382-1 As Required Washer

(a) ARG7323-1 Bolt is an alternate part for ARG7063-503 Bolt. ARG7323-1 Bolt has an unlimited Safe Life

Limit when new.

Option 3

Monitor bolt(s) SLL and do Option 1 or Option 2 at threshold specified in Paragraph 1.E.,

Compliance.

2. Put the airplane back to a serviceable condition.

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