# Boeing Alert Service Bulletin DC10-32A260: No revision named

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- Document: [Boeing Alert Service Bulletin DC10-32A260](https://openairdocs.org/service-documents/boeing/dc10-32a260.md)
- Title as filed: U.S. DOT/FAA - SB-DC10-32A260-00
- Pages: 16
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### Page 1

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.
9E991ECCN:
BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET
Copyright © 2011 The Boeing Company
Unpublished Work - All Rights Reserved
Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable
subject matter. Boeing also claims copyright in this document as a compilation and/or collective work.
This document includes proprietary information owned by The Boeing Company and/or one or more third parties.
Treatment of the document and the information it contains is governed by contract with Boeing. For more
information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124.
Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner,
BBJ, DC-8, DC-9, DC-10, KC-10, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and the
Boeing livery are all trademarks owned by The Boeing Company; and no trademark license is granted in
connection with this document unless provided in writing by Boeing.
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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 ............................................... 1 0
G. Manpower .............................................. 1 0
H. Weight and Balance Changes .................................... 1 1
I. Electrical Load Data ......................................... 1 1
J. References .............................................. 1 1
1. Existing Data .......................................... 1 1
2. Data supplied with this Service Bulletin ............................ 1 1
3. Installation Drawings Used in the Preparation of this Service Bulletin ............ 1 1
K. Publications Affected ........................................ 1 1
L. Interchangeability and Intermixability of Parts ........................... 1 1
2. MATERIAL INFORMATION ........................................ 1 3
A. Material - Price and Availability ................................... 1 3
B. Industry Support Information .................................... 1 3
C. Parts Necessary For Each Airplane ................................. 1 3
1. Kits/Parts ............................................ 1 3
2. Parts and Materials Supplied by the Operator ........................ 1 3
3. Parts Modified and Reidentified ................................ 1 4
4. Parts Removed and Not Replaced .............................. 1 4
D. Parts Necessary to Change Spares ................................. 1 4
E. Special Tooling - Price and Availability ............................... 1 4
F. Special Tooling Necessary to do this Service Bulletin ....................... 1 4
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 1 5
A. GENERAL INFORMATION ..................................... 1 5
B. WORK INSTRUCTIONS ....................................... 1 5
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Commercial 
Airplanes
DC10
Service Bulletin
ALERT
SummaryNumber: DC10-32A260Original 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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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.
DESCRIPTIONCONFIGURATIONGROUP
Inspect Left and Right Main Landing Gear Upper Torque Link Bolt-1
Airplane Models:
DC-10-10, MD-10-10F
GroupFuselage Num-
ber
132
139
155
186
189
1119
1139
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GroupFuselage Num-
ber
1142
1198
1207 - 209
1250
1273
1285
1319
1353
1379
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.
Serial NumberManufacturer
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:
Serial NumberManufacturer
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
ZoneModel
734, 744DC-10-10, MD-10-10F
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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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)
ActionCondition
-Before 6,590
flight cycles
from installation.
Before further
flight.
Replace bolt fabricated
from bar stock and a ma-
chined 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.
Elapsed HoursTask HoursNumber of PersonsTask
1.02.02Replace
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Elapsed HoursTask HoursNumber of PersonsTask
1.02.0TOTAL FOR EACH AIRPLANE
H. Weight and Balance Changes
Option 1
None.
Option 2
Moment Change
(MEW) IN.-LBS
Mfr's Empty
Weight (MEW)
LBS
Approximate Sta-
tion (Inches)Airplane
+12833.8+8.9+1442.0DC-10-10, MD-10-
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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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
NotesExisting Part NumberNameQTYPart Number /
Specification
(a)ARG7063-503Upper MLG Torque Link BoltAs Re-
quired
ARG7063-503
(a) ARG7063-503 has a Safe Life Limit of 47,300 flight cycles when new.
Option 2
NotesExisting Part NumberNameQTYPart Number /
Specification
(a)ARG7063-503Upper MLG Torque Link BoltAs Re-
quired
ARG7323-1
ARG7071-1NutAs Re-
quired
ARG7383-1
NAS6404U15BoltAs Re-
quired
NAS6404U24
MS21042L4NutAs Re-
quired
MS21042L4
NAS1252-416HWasherAs Re-
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:
Serial NumberManufacturer
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.
NameQTYPart Number / Specification
Upper MLG Torque Link BoltAs RequiredARG7063-503
NutAs RequiredARG7071-1
BoltAs RequiredNAS6404U15
NutAs RequiredMS21042L4
WasherAs RequiredNAS1252-416H
b) Install the parts on the table that follows: Refer to DC-10, MD-10 AMM 32-11-02 as an accepted
procedure.
NotesNameQTYPart Number / Specification
(a)Upper MLG Torque Link BoltAs RequiredARG7323-1
NutAs RequiredARG7383-1
BoltAs RequiredNAS6404U24
NutAs RequiredMS21042L4
WasherAs RequiredARG7382-1
(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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