AD 52-18-01
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 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 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 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 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 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 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 Aircraft |
Unsafe Condition
Splitting and tearing of the neoprene carburetor adapter gasket (P/N S20-480-1101-2) can block the carburetor air passage, resulting in abrupt engine cutout.
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Required Actions
Install new gasket and clamping assembly per USAF T.O. 01-25LA-79 or install carburetor adapter flange Slick Airways P/N 00391-2. Inspect gaskets for looseness and splitting during each periodic inspection until compliance.
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Compliance Time
not later than December 1, 1952
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Affected Aircraft
CURTISS-WRIGHT Model C-46 aircraft equipped with Curtiss Drawing P/N S20-480-1101-2 Carburetor Adapter Gasket
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Federal Register Abstract
Carburetor Adapter Gasket
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_52-18-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 52-18-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CURTISS-WRIGHT Model C-46 Aircraft Subject: Carburetor Adapter Gasket 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: 52-18-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 52-18-01 SUBJECT HEADING: CURTISS-WRIGHT Model C-46 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 52-18-01 CURTISS-WRIGHT: Applies to all Model C-46 aircraft equipped with Curtiss Drawing P/N S20-480-1101-2 Carburetor Adapter Gasket. Compliance required not later than December 1, 1952. Several instances of splitting and tearing of the neoprene carburetor adapter gasket, P/N S20-480-1101-2, permitting portions of gasket material to block the carburetor air passage has resulted in abrupt engine cutout. To eliminate the occurrence of this hazardous condition, either of the following changes or an approved equivalent shall be accomplished: (a) Install new gasket and clamping assembly per USAF T.O. 01-25LA-79. (b) Install carburetor adapter flange, Slick Airways P/N 00391-2. As a precautionary measure, the subject gaskets shall be inspected for signs of looseness and splitting during each periodic inspection until accomplishment of the above. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_52-18-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 52-18-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CURTISS-WRIGHT Model C-46 Aircraft Subject: Carburetor Adapter Gasket 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: 52-18-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 52-18-01 SUBJECT HEADING: CURTISS-WRIGHT Model C-46 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 52-18-01 CURTISS-WRIGHT: Applies to all Model C-46 aircraft equipped with Curtiss Drawing P/N S20-480-1101-2 Carburetor Adapter Gasket. Compliance required not later than December 1, 1952. Several instances of splitting and tearing of the neoprene carburetor adapter gasket, P/N S20-480-1101-2, permitting portions of gasket material to block the carburetor air passage has resulted in abrupt engine cutout. To eliminate the occurrence of this hazardous condition, either of the following changes or an approved equivalent shall be accomplished: (a) Install new gasket and clamping assembly per USAF T.O. 01-25LA-79. (b) Install carburetor adapter flange, Slick Airways P/N 00391-2. As a precautionary measure, the subject gaskets shall be inspected for signs of looseness and splitting during each periodic inspection until accomplishment of the above. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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