AD 51-29-02
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 Aircraft |
| 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 Aircraft |
| 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 Aircraft |
| 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 Aircraft |
| 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 Aircraft |
| 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 Aircraft |
| 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 Aircraft |
Unsafe Condition
Cracks in main landing gear side brace attachment fittings, P/N 20-310-1033 L and R, particularly from the edge of the forging to the lower inboard attaching bolt hole.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the main landing gear side brace attachment fittings for cracks using an 8-power magnifying glass, dye penetrant, or equivalent method. Replace cracked fittings if cracks extend beyond the bolt hole. Operate with cracked fittings only under controlled inspection procedures until further notice.
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Compliance Time
Compliance required by February 1, 1952, and each 500 hours thereafter.
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Affected Aircraft
Curtiss-Wright Model C-46 Series aircraft including C-46A, C-46D, C-46F, C-46R, C-46E, C-46/CW20-T, and Super C-46/CW20-T models.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Main Landing Gear
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_51-29-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 51-29-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CURTISS-WRIGHT Model C-46 Series Aircraft Subject: Main Landing Gear Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 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: 51-29-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 51-29-02 SUBJECT HEADING: CURTISS-WRIGHT Model C-46 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 51-29-02 CURTISS-WRIGHT: Applies to all Model C-46 Series aircraft. Compliance required by February 1, 1952, and each 500 hours thereafter. Inspect the main landing gear side brace attachment fittings, P/N 20-310-1033 L and R, for cracks particularly from the edge of the forging to the lower inboard attaching bolt hole. If defects are found, the parts should be replaced by undamaged parts. In view of unavailability of parts and controlled inspection procedures under which satisfactory operation has existed, it will be considered satisfactory to operate the aircraft with a cracked fitting under the following procedure until further notice. Inspect at periodic intervals not to exceed 150 hours with approximately an 8-power magnifying glass or dye penetrant or any equivalent method. If cracks extend beyond bolt hole, either through or around the hole, the fitting must be replaced. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_51-29-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 51-29-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CURTISS-WRIGHT Model C-46 Series Aircraft Subject: Main Landing Gear Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 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: 51-29-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 51-29-02 SUBJECT HEADING: CURTISS-WRIGHT Model C-46 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 51-29-02 CURTISS-WRIGHT: Applies to all Model C-46 Series aircraft. Compliance required by February 1, 1952, and each 500 hours thereafter. Inspect the main landing gear side brace attachment fittings, P/N 20-310-1033 L and R, for cracks particularly from the edge of the forging to the lower inboard attaching bolt hole. If defects are found, the parts should be replaced by undamaged parts. In view of unavailability of parts and controlled inspection procedures under which satisfactory operation has existed, it will be considered satisfactory to operate the aircraft with a cracked fitting under the following procedure until further notice. Inspect at periodic intervals not to exceed 150 hours with approximately an 8-power magnifying glass or dye penetrant or any equivalent method. If cracks extend beyond bolt hole, either through or around the hole, the fitting must be replaced. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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