AD 55-02-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Lycoming Engines | O-320-A1A | LYCOMING Model O-320 Engines |
| engine | Lycoming Engines | O-320-A2A | LYCOMING Model O-320 Engines |
Unsafe Condition
Rapid loss of engine oil from the engine accessory drive adapter gasket location leading to immediate forced landings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect to ensure the proper gasket (Lycoming P/N 69551) is installed under the lower accessory drive adapter cover. Install the specified gasket for engines with fixed pitch propellers.
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Compliance Time
As soon as possible but not later than February 28, 1955.
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Affected Aircraft
Lycoming Engines Model O-320 engines below serial number 612 installed in aircraft equipped with fixed pitch propellers.
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Federal Register Abstract
Gasket
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_55-02-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 55-02-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LYCOMING Model O-320 Engines Subject: Gasket Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lycoming Engines Model: O-320-A1A | O-320-A2A Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 55-02-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 55-02-02 SUBJECT HEADING: LYCOMING Model O-320 Engines ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 55-02-02 LYCOMING: Applies to Model O-320 Engines Below Serial Number 612 Installed in Aircraft Equipped With Fixed Pitch Propellers. Compliance required as soon as possible but not later than February 28, 1955. Several immediate forced landings have occurred with aircraft equipped with the above engine and propeller combinations due to rapid loss of engine oil from the engine accessory drive adapter gasket location. To preclude this possibility, all such engines should be inspected to insure that the proper gasket is installed under the lower accessory drive adapter cover. For engines with fixed pitch propellers, Lycoming P/N 69551, gasket must be installed at this location. (Lycoming Service Bulletin No. 176 covers this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_55-02-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 55-02-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LYCOMING Model O-320 Engines Subject: Gasket Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lycoming Engines Model: O-320-A1A | O-320-A2A Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 55-02-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 55-02-02 SUBJECT HEADING: LYCOMING Model O-320 Engines ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 55-02-02 LYCOMING: Applies to Model O-320 Engines Below Serial Number 612 Installed in Aircraft Equipped With Fixed Pitch Propellers. Compliance required as soon as possible but not later than February 28, 1955. Several immediate forced landings have occurred with aircraft equipped with the above engine and propeller combinations due to rapid loss of engine oil from the engine accessory drive adapter gasket location. To preclude this possibility, all such engines should be inspected to insure that the proper gasket is installed under the lower accessory drive adapter cover. For engines with fixed pitch propellers, Lycoming P/N 69551, gasket must be installed at this location. (Lycoming Service Bulletin No. 176 covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
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