HERCULES Lockheed Martin Aeronautics Company 

Marietta, Georgia 30063 

SERVICE BULLETIN 

WINGS - REPLACEMENT OF OUTER WINGS 

1. PLANNING INFORMATION 

A. EFFECTIVITY 

This Service Bulletin is applicable to all model382, 382B, 382E, 382F, and 382G series FAA Certificated 

Hercules aircraft (excluding 382J series aircraft). 

B. REASON 

(1) The 14 CFR Part 26, Subpart CAging Aircraft Safety- Widespread Fatigue Damage rule became 

effective on January 14, 2011. In compliance with this rule, Lockheed Martin Aeronautics 

Company established a Limit of Validity (LOV) for 382 series aircraft that is published in Section 

VII of customer specific Service Manual Publication (SMP) 515-C Inspection Programs. 14 CFR 

Part 121 or Part 129 operators must have incorporated the LOV into their maintenance program 

by July 14, 2013 to comply with FAR §121.1115 or §129.115. This Service Bulletin presents a 

maintenance action required for the outer wing to safeguard the aircraft against widespread 

fatigue damage up to the LOV. 

(2) Widespread Fatigue Damage (WFD) is general degradation of large areas of structure with 

fatigue cracks manifesting and growing simultaneously at similar structural details and stress 

levels. Fatigue damage is increasingly likely as the aircraft is operated and aged, and without 

intervention, WFD is likely to compromise the structural integrity of the aircraft. Structural fatigue 

characteristics of airplanes are understood only up to the point where analyses and testing of the 

structure are valid. The purpose of this action is to replace the outer wings currently installed on 

the affected aircraft with an outer wing of new manufacture prior to the on-set of WFD in the outer 

wing structure. 

(3) It is recommended that the following compliance timeline be followed for aircraft with outer wing 

serial numbers 3946 through 4541 or MEP 14Y type replacement outer wings (Part No. 

388021-9/-1 0) installed (indicated on the outer wing identification placard located on the rear 

beam web near OWS 180): 

(a) For aircraft with less than 30,000 flight hours on the outer wing, the outer wing shall be 

replaced prior to the accumulation of 30,000 flight hours. 

(b) For aircraft with greater than 30,000 flight hours on the outer wing, the aircraft shall be 

grounded until the outer wing is replaced. 

(4) In accordance with 14 CFR § 26.21 , the Limit of Validity (LOV) for all 382 Series aircraft is 58,000 

Flight Cycles or 75,000 Flight Hours whichever comes first. The outer wing is subject to the 

75,000 flight hour life limit of the LOV. Although Lockheed Martin does not consider the outer 

wing to be a rotable component, it is understood that 382 Series outer wings are interchangeable 

(with minimal systems modifications) between aircraft. 

EXPORT CONTROLLED INFORMATION 

WARNING -This document contains data whose export is restricted by the Arms Export Control Act (Title 22, U.S.C., Sec 2751, et 

seq.) as amended, or the Export Administration Act (Title 50, U.S.C., App 2401 et seq.) as amended. Violations of these export laws 

are subject to severe criminal and civil penalties. 

0 2013 LOCKHEED MARTIN CORPORATION. LOCKHEED MARTIN PROPRIETARY INFORMATION. 

December 16, 2013 382-57-96 

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HERCULES Lockheed Martin Aeronautics Company 

Marietta, Georgia 30063 

SERVICE BULLETIN 

Therefore, it is recommended that the following compliance timeline be followed for aircraft with 

outer wing serial numbers 4542 and up or all MEP replacement outer wings except the 14Y (Part 

No. 388021-9/-10) installed (indicated on the outer wing identification placard located on the rear 

beam web near OWS180): 

(a) For aircraft with less than 75,000 flight hours on the outer wing, the outer wing shall be 

replaced with an outer wing that has less than 75,000 flight hours prior to the accumulation 

of 75,000 flight hours on the subject outer wing. 

(b) For aircraft with greater than 75,000 flight hours on the outer wing, the aircraft shall be 

grounded until the outer wing is replaced with an outer wing that has less than 75,000 flight 

hours. 

All flight hour tracking and interchangeability concerns are the responsibility of the operator. 

Instructions described in Paragraph 2., Accomplishment Instructions, are not applicable to 

Outer Wing Serial Numbers 4542 and up, or MEP replacement outer wings except MEP 14Y 

(P/N 388021-9/-10.) Contact Lockheed Martin for replacement instructions. 

The replacement times indicated in this service bulletin do not apply to military operators of 

382, 3828, 382E, 382F, and 382G aircraft. Contact Lockheed Martin for an Operational 

Usage Evaluation/Service Life Assessment to determine an appropriate replacement 

schedule. 

For commercial operators of aircraft with outer wings that have had previous military usage, 

contact Lockheed Martin for adjusted compliance times. 

Lockheed Martin recommends replacement of the outer wing with one of new construction. 

Contact Lockheed Martin Aeronautics Company for part availability. Contact information can 

be found in Paragraph 1.F. 

Installation and check-out of plumbing, fuel, electrical, hydraulic, flight control components, 

and system components are the responsibility of the owner/operator. Limited salvage 

information can be found in the applicable customer Maintenance Manual or Illustrated Parts 

Catalog. 

These work instructions refer to methods, techniques, and practices described in other 

Lockheed Martin Aeronautics Company documents. When the words "refer to" are used and 

the operator has other acceptable methods, techniques, and practices (including tools, 

equipment, and test equipment) those procedures may be used to complete the work. When 

the words "in accordance with" are included in the instruction, the methods, techniques, and 

practices (including tools, equipment, and test equipment) specified in the Lockheed Martin 

Aeronautics Company document must be used. 

C. DESCRIPTION 

This Service Bulletin provides instructions for replacing the outer wing structure on affected aircraft. 

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HERCULES Lockheed Martin Aeronautics Company 

Marietta, Georgia 30063 

SERVICE BULLETIN 

D. APPROVAL 

(1) The aircraft owner/operator will make an appropriate entry in the aircraft log records upon 

compliance with this Service Bulletin. 

(2) After the work has been completed on each affected aircraft, please complete and mail or fax 

(770-494-5682) a Notice of Service Bulletin Compliance; or notify Lockheed Martin Aeronautics 

Company of compliance with this Service Bulletin at website address: 

http://www.lockheedmartin.com/eoc and log into Data Library. 

(3) This Service Bulletin has been approved by the FAA as complying with applicable Federal 

Aviation Regulations. 

E. MANPOWER 

The work prescribed in this Service Bulletin has not been performed at the Lockheed Martin facility. 

Therefore, the manpower estimates provided have not been validated, and should not be construed as 

being acceptable for use in making fixed price quotes for accomplishment of the work. These estimates 

are provided only as a convenience for customer planning purposes. It is estimated that approximately 

1,500 man hours (a crew of 11 men) will be required to accomplish the work described herein on each 

affected aircraft. This will take approximately one month elapsed time while the aircraft is out of service. 

This Service Bulletin is based upon the configuration of the aircraft as it was delivered from 

Lockheed Martin Aeronautics Company. Previous service bulletins issued by Lockheed 

Martin Aeronautics Company have been considered in the preparation of this Service 

Bulletin, but no consideration has been given to peculiar changes made to the aircraft by the 

owner/operator since its delivery. 

F. MATERIAL- COST AND AVAILABILITY 

(1) Requests for kits 3366500-1/-3 and/or -2/-4 listed in Paragraph 3, required for each affected 

aircraft, should be made to Lockheed Martin Aeronautics Company. Parts bearing Lockheed 

Martin Aeronautics Company part numbers are considered proprietary and shall be purchased 

from Lockheed Martin Aeronautics Company unless methods of fabrication are shown in this 

publication. Inquiries concerning current prices, applicability, and availability of kits may be 

directed to the following: 

MAIL: 

TELEPHONE: 

FAX: 

Lockheed Martin Aeronautics Company 

C-130 Commercial Contracts 

Department F532 

Zone 0195 

86 South Cobb Drive 

Marietta, GA 30063-0195, USA 

(770) 494-5165 

(817) 655-9700 

(2) Additional bulk materials, not included in the kit, will be supplied by the aircraft owner/operator. 

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HERCULES Lockheed Martin Aeronautics Company 

Marietta, Georgia 30063 

SERVICE BULLETIN 

G. TOOLING- PRICE AND AVAILABILITY 

The following tooling is required and will be obtained through the applicable supply source: 

Quantity Part Number 

341206-51 

H. WEIGHT AND BALANCE 

Nomenclature 

Sling Assembly (or equivalent) 

Due to the nature of the outer wing replacement, the actual weight and balance changes, resulting from 

the instructions herein, cannot be accurately determined. Therefore, the aircraft must be weighed in 

accordance with the applicable aircraft Weight & Balance Manual. 

I. REFERENCES 

Hercules Maintenance Manual, SMP 581 

Lockheed Martin Aeronautics Company Drawings 

J. OTHER PUBLICATIONS AFFECTED 

Hercules Corrosion Prevention and Control Manual 

Hercules Illustrated Parts Catalog 

Hercules Structural Repair Manual 

Hercules Wiring Diagram Manual 

3366500 

Hercules Airfreighter Series Inspection Program, SMP 515-C 

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December 16, 2013 
HERCULES Lockheed Martin Aeronautics Company 

Marietta, Georgia 30063 

SERVICE BULLETIN 

2. ACCOMPLISHMENT INSTRUCTIONS 

This Bulletin identifies the action, designates the aircraft affected, provides applicable planning information, 

and identifies the parts, materials, and drawings required for installation. This modification will be 

accomplished in accordance with Lockheed Martin Aeronautics Company Top Kit Drawing 3366500. 

WARNING: OBSERVE ALL APPLICABLE SAFETY PRECAUTIONS WHILE ACCOMPLISHING THIS 

MODIFICATION. ENSURE THAT ALL ELECTRICAL AND HYDRAULIC POWER 

SOURCES ARE OFF, THE BATTERY AND EXTERNAL ELECTRICAL POWER 

DISCONNECTED, AND HYDRAULIC SYSTEMS DEPRESSURIZED BEFORE STARTING 

THE WORK. FAILURE TO COMPLY MAY RESULT IN SERIOUS INJURY OR DEATH. 

In case of any discrepancy between these instructions and Installation Procedures drawings, the 

actual drawings shall take precedence. 

A. Unload replacement outer wing. 

B. Prepare aircraft for maintenance. 

C. Remove outer wing. Refer to SMP 581, Chapter 57, or other approved maintenance procedures. 

Salvage wing tips, plumbing, wiring, and all removed components until completion of replacement outer 

wing installation. 

D. Install components of 3366500-1 or 3366500-2 Outer Wing Replacement Top Kit onto replacement 

outer wing structure per 3366500-1 or 3366500-2. 

E. Transfer salvaged components to replacement 3366500-3 or 3366500-4 Outer Wing Structure. 

F. Install replacement outer wing in accordance with 3366506-1 or 3366506-2. Refer to SMP581, Chapter 

57, or other approved maintenance procedures. 

G. Check for gap condition between the outer wing upper and lower trailing edge mating angles and the 

center wing trailing edge rib. The gap must not exceed 0.030 inches. Shim as required. Refer to 

SMP 581 , Chapter 57 or other approved maintenance procedures. 

H. Perform operational checks of disturbed equipment. Refer to applicable Hercules Maintenance Manual 

(or equivalent approved operator procedures) for instructions. 

I. Perform functional check flight of modified aircraft. 

J. Restore aircraft to service. 

If assistance is needed, contact your local Lockheed Martin Aeronautics Company 

Representative, or the Enterprise Operations Center- Technical Support in Marietta, Georgia, 

USA, as follows: 

TELEPHONE: (770) 494-9131 

FAX: 

E-MAIL: 

MAIL: 

December 16, 2013 

(770) 494-9122 

hercules.support@lmco.com 

Lockheed Martin Aeronautics Company 

86 South Cobb Drive 

Dept. 3E1 M, Zone 0591 

Marietta, GA 30063, USA 

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HERCULES Lockheed Martin Aeronautics Company 

Marietta, Georgia 30063 

SERVICE BULLETIN 

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HERCULES Lockheed Martin Aeronautics Company 

Marietta, Georgia 30063 

SERVICE BULLETIN 

3. MATERIAL INFORMATION 

NOTE: Lockheed Martin Aeronautics Company Top Kit Drawing Installations 3366500-1 or -2 will detail 

aircraft modifications required to facilitate replacement of aircraft outer wing and structure. 

A. The following kits will be provided by the aircraft owner/operator and are required to modify 

FAA-Certificated aircraft listed in Paragraph 1.A. Kits may be obtained from Lockheed Martin in 

accordance with Paragraph 1.F. 

(1) For left outer wing: 

PART 

NUMBER QUANTITY KEY WORD 

3366500-1 

3366500-3 

1 

1 

(2) For right outer wing: 

Top Kit- Outer Wing Replacement, FAA 

Top Kit- Wing Box Structure 

PART 

NUMBER QUANTITY KEY WORD 

3366500-2 

3366500-4 

1 

1 

Top Kit- Outer Wing Replacement, FAA 

Top Kit- Wing Box Structure 

B. The following parts will be removed in compliance with this Service Bulletin: 

(1) For left outer wing: 

PART 

NUMBER QUANTITY KEYWORD 

392521-1 1 Outer Wing Assembly 

392521-7 1 Outer Wing Assembly 

392521-11 1 Outer Wing Assembly 

392521-17 1 Outer Wing Assembly 

392521-23 1 Outer Wing Assembly 

388021-9 1 Outer Wing Assembly, 14Y 

INSTRUCTIONS/ 

DISPOSITION 

Note 1 

Note 1 

INSTRUCTIONS/ 

DISPOSITION 

Note 1 

Note 1 

INSTRUCTIONS/ 

DISPOSITION 

Notes 2 and 3 

Notes 2 and 4 

Notes 2 and 5 

Notes 2 and 6 

Notes 2 and 7 

Notes 2 and 8 

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HERCULES Lockheed Martin Aeronautics Company 

Marietta, Georgia 30063 

SERVICE BULLETIN 

(2) For right outer wing: 

PART 

NUMBER 

392521-2 

392521-8 

392521-12 

392521-18 

392521-24 

388021-10 

NOTE: 

File: 1-3686 

382-57-96 

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INSTRUCTIONS/ 

QUANTITY KEYWORD DISPOSITION 

1 Outer Wing Assembly Notes 2 and 3 

1 Outer Wing Assembly Notes 2 and 4 

1 Outer Wing Assembly Notes 2 and 5 

1 Outer Wing Assembly Notes 2 and 6 

Outer Wing Assembly Notes 2 and 7 

1 Outer Wing Assembly, 14Y Notes 2 and 8 

1. Part may be obtained from Lockheed Martin Aeronautics Company in accordance with 

Paragraph 1.F. 

2. Scrap old part. 

3. Applies to outer wings originally installed on Serials 3946 through 4147. 

4. Applies to outer wings originally installed on Serial 4208. 

5. Applies to outer wings originally installed on Serial 4248. 

6. Applies to outer wings originally installed on Serials 4299 through 4388. 

7. Applies to outer wings originally installed on Serials 4472 and 4578. 

8. Applies to 14Y replacement outer wings. 

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