### 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. 9E991 ECCN: 

## BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2011 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 1 of 16 4.0BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 2 of 16 **BOEING SERVICE BULLETIN DC10-32A260 ALERT**  **ALERT**

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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 3 of 16 **BOEING SERVICE BULLETIN DC10-32A260 ALERT**  **ALERT**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 4 of 16 **BOEING SERVICE BULLETIN DC10-32A260 ALERT**  **ALERT**

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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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 5 of 16**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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 6 of 16 **BOEING SERVICE BULLETIN DC10-32A260 ALERT**  **ALERT**

### 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.

**DESCRIPTION CONFIGURATION**  **GROUP** Inspect Left and Right Main Landing Gear Upper Torque Link Bolt

- 1

Airplane Models: DC-10-10, MD-10-10F **Group Fuselage Num-**  **ber** 1 32 1 39 1 55 1 86 1 89 1 119 1 139

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 7 of 16**Group Fuselage Num-**  **ber** 1 142 1 198 1 207 - 209 1 250 1 273 1 285 1 319 1 353 1 379 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 Number Manufacturer**  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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 8 of 16 **BOEING SERVICE BULLETIN DC10-32A260 ALERT**  **ALERT 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 Number Manufacturer**  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 Zone**  **Model** 734, 744 DC-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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 9 of 16 **BOEING SERVICE BULLETIN DC10-32A260 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)**  **Action Condition** 

- Before 6,590 flight cycles from installation. Before further flight. Replace bolt fabricatedfrom 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. **Elapsed Hours Task Hours**  **Number of Persons Task**  1.0 2.0 2 Replace

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 10 of 16 **BOEING SERVICE BULLETIN DC10-32A260 ALERT**  **ALERT Elapsed Hours**  **Task Hours Number of Persons**  **Task** 1.0 2.0 TOTAL 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 +1442.0 DC-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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 11 of 16 **BOEING SERVICE BULLETIN DC10-32A260 ALERT**  **ALERT**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 12 of 16 **BOEING SERVICE BULLETIN DC10-32A260 ALERT**  **ALERT**

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**
**Notes Existing Part Number**  **Name QTY**  **Part Number / Specification**  (a) ARG7063-503 Upper MLG Torque Link Bolt As Re- quired ARG7063-503 (a) ARG7063-503 has a Safe Life Limit of 47,300 flight cycles when new. **Option 2**
**Notes Existing Part Number**  **Name QTY**  **Part Number / Specification**  (a) ARG7063-503 Upper MLG Torque Link Bolt As Re- quired ARG7323-1

ARG7071-1 Nut As Re- quired ARG7383-1

NAS6404U15 Bolt As Re- quired NAS6404U24

MS21042L4 Nut As Re- quired MS21042L4

NAS1252-416H Washer As 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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 13 of 16 **BOEING SERVICE BULLETIN DC10-32A260 ALERT**  **ALERT**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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 14 of 16 **BOEING SERVICE BULLETIN DC10-32A260 ALERT**  **ALERT 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 Number Manufacturer**  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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 15 of 16 **BOEING SERVICE BULLETIN DC10-32A260 ALERT**  **ALERT 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.
**Name QTY**  **Part Number / Specification** Upper MLG Torque Link Bolt As Required ARG7063-503 Nut As Required ARG7071-1 Bolt As Required NAS6404U15 Nut As Required MS21042L4 Washer As Required NAS1252-416H b) Install the parts on the table that follows: Refer to DC-10, MD-10 AMM 32-11-02 as an accepted procedure.
**Notes Name**  **QTY Part Number / Specification**  (a) Upper MLG Torque Link Bolt As Required ARG7323-1 Nut As Required ARG7383-1 Bolt As Required NAS6404U24 Nut As Required MS21042L4 Washer As Required 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. 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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: September 30, 2011 DC10-32A260 16 of 16 **BOEING SERVICE BULLETIN DC10-32A260 ALERT**  **ALERT**