AD 74-18-03
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | C-46A | CURTISS-WRIGHT Model C-46 Series Airplanes |
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | C-46D | CURTISS-WRIGHT Model C-46 Series Airplanes |
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | C-46F | CURTISS-WRIGHT Model C-46 Series Airplanes |
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | C-46R | CURTISS-WRIGHT Model C-46 Series Airplanes |
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | C-46E | CURTISS-WRIGHT Model C-46 Series Airplanes |
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | C-46/CW20-T | CURTISS-WRIGHT Model C-46 Series Airplanes |
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | Super C-46/CW20-T | CURTISS-WRIGHT Model C-46 Series Airplanes |
Unsafe Condition
Failures of the main landing gear axle elbows, Part Number 8107-63L and 8107-63R, due to cracks.
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Required Actions
Inspect the main landing gear axle elbows (Part Numbers 8107-63L and -63R) for cracks visually with a ten power or higher glass or equivalent FAA approved method. Replace cracked elbows before further flight. Adjust inspection intervals upon FAA approval if operator provides substantiating data.
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Compliance Time
Within 200 hours' time in service after the effective date (August 30, 1974) for aircraft with elbows exceeding 7800 hours' time in service on the effective date. For others, at 8,000 hours' time in service and thereafter every 500 hours' time in service.
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Affected Aircraft
Curtiss-Wright Model C-46 Series airplanes with main landing gear axle elbows Part Numbers 8107-63L and 8107-63R, including models C-46A, C-46D, C-46F, C-46R, C-46E, C-46/CW20-T, and Super C-46/CW20-T.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Main Landing Gear Axle Elbow
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_74-18-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-18-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CURTISS-WRIGHT Model C-46 Series Airplanes Subject: Main Landing Gear Axle Elbow Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/30/1974 Make: Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Air...Show more Model: C-46A | C-46D | C-46F | C-46R | C-46E | C-46/CW20-T | Super C-46/CW20-T Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 74-18-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1937 AD NUMBER: 74-18-03 SUBJECT HEADING: CURTISS-WRIGHT Model C-46 Series Airplanes ACTION: SUMMARY: DATES: Effective August 30, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-18-03 CURTISS-WRIGHT: Amendment 39-1937. Applies to all Model C-46 Series airplanes certificated in all categories. To prevent failures of the main landing gear axle elbows, Part Number 8107-63L and 8107-63R, accomplish the following, unless already accomplished: (a) For aircraft having main landing gear axle elbows with less than 7800 hours' time in service on the effective date of this AD, at 8,000 hours' time in service and thereafter, at intervals not to exceed 500 hours' time in service, inspect the part numbers 8107-63L and -63R elbows for cracks visually with a ten power or higher glass or in an equivalent FAA approved manner. (b) For aircraft having main landing gear axle elbows with more than 7800 hours' time in service on the effective date of this AD, within 200 hours' time in service after the effective date of this AD, and thereafter at intervals not to exceed 500 hours' time in service, inspect the Part Numbers 8107-63L and -63R elbows for cracks visually with a ten power or higher glass or in an equivalent FAA approved manner. (c) Replace cracked elbows with serviceable parts before further flight. (d) Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA Southern Region, may adjust the repetitive inspection intervals specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for such operator. This amendment becomes effective August 30, 1974. FOOTER:
Document Text
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AD Final Rules - DRS_74-18-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-18-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CURTISS-WRIGHT Model C-46 Series Airplanes Subject: Main Landing Gear Axle Elbow Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/30/1974 Make: Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Air...Show more Model: C-46A | C-46D | C-46F | C-46R | C-46E | C-46/CW20-T | Super C-46/CW20-T Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 74-18-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1937 AD NUMBER: 74-18-03 SUBJECT HEADING: CURTISS-WRIGHT Model C-46 Series Airplanes ACTION: SUMMARY: DATES: Effective August 30, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-18-03 CURTISS-WRIGHT: Amendment 39-1937. Applies to all Model C-46 Series airplanes certificated in all categories. To prevent failures of the main landing gear axle elbows, Part Number 8107-63L and 8107-63R, accomplish the following, unless already accomplished: (a) For aircraft having main landing gear axle elbows with less than 7800 hours' time in service on the effective date of this AD, at 8,000 hours' time in service and thereafter, at intervals not to exceed 500 hours' time in service, inspect the part numbers 8107-63L and -63R elbows for cracks visually with a ten power or higher glass or in an equivalent FAA approved manner. (b) For aircraft having main landing gear axle elbows with more than 7800 hours' time in service on the effective date of this AD, within 200 hours' time in service after the effective date of this AD, and thereafter at intervals not to exceed 500 hours' time in service, inspect the Part Numbers 8107-63L and -63R elbows for cracks visually with a ten power or higher glass or in an equivalent FAA approved manner. (c) Replace cracked elbows with serviceable parts before further flight. (d) Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA Southern Region, may adjust the repetitive inspection intervals specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for such operator. This amendment becomes effective August 30, 1974. FOOTER:
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Retrieved: Apr 8, 2026
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