AD 53-11-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-2 Mk.I | Airworthiness Directives; de Havilland Model DHC-2 (Beaver) Aircraft |
| aircraft | Viking Air Limited | DHC-2 Mk.II | Airworthiness Directives; de Havilland Model DHC-2 (Beaver) Aircraft |
| aircraft | Viking Air Limited | DHC-2 Mk.III | Airworthiness Directives; de Havilland Model DHC-2 (Beaver) Aircraft |
Unsafe Condition
Chafing of the engine oil sump by section assemblies (P/N C2-E-105ND and C2-E-107ND) of the accessory firewall.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Incorporate an enlarged flange clearance as soon as possible but not later than the next 100 hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than the next 100 hours
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
de Havilland Model DHC-2 (Beaver) Aircraft, Serial Numbers 1 to 445 Inclusive.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Engine Oil Sump Chafing
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_53-11-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 53-11-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; de Havilland Model DHC-2 (Beaver) Aircraft Subject: Engine Oil Sump Chafing Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Viking Air Limited Model: DHC-2 Mk.I | DHC-2 Mk.II | DHC-2 Mk.III Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 53-11-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 53-11-02 SUBJECT HEADING: Airworthiness Directives; de Havilland Model DHC-2 (Beaver) Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 53-11-02 de HAVILLAND: Applies to Model DHC-2 (Beaver) Aircraft, Serial Numbers 1 to 445 Inclusive. Compliance required as indicated. Cases have been reported of chafing of the engine oil sump by section assemblies. (P/N C2-E-105ND) and (P/N C2-E-107ND) of accessory firewall. An enlarged flange clearance is required to be incorporated as soon as possible but not later than the next 100 hours. The FAA concurs in this mandatory action by the Canadian Department of Transport. (de Havilland Technical News Sheet, Series B, No. 64 dated March 23, 1953, available from de Havilland Aircraft of Canada, Ltd., Toronto, Ontario, Canada, covers this same subject and describes method of repair.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_53-11-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 53-11-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; de Havilland Model DHC-2 (Beaver) Aircraft Subject: Engine Oil Sump Chafing Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Viking Air Limited Model: DHC-2 Mk.I | DHC-2 Mk.II | DHC-2 Mk.III Product Type: Aircraft Product Subtype: Small 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: 53-11-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 53-11-02 SUBJECT HEADING: Airworthiness Directives; de Havilland Model DHC-2 (Beaver) Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 53-11-02 de HAVILLAND: Applies to Model DHC-2 (Beaver) Aircraft, Serial Numbers 1 to 445 Inclusive. Compliance required as indicated. Cases have been reported of chafing of the engine oil sump by section assemblies. (P/N C2-E-105ND) and (P/N C2-E-107ND) of accessory firewall. An enlarged flange clearance is required to be incorporated as soon as possible but not later than the next 100 hours. The FAA concurs in this mandatory action by the Canadian Department of Transport. (de Havilland Technical News Sheet, Series B, No. 64 dated March 23, 1953, available from de Havilland Aircraft of Canada, Ltd., Toronto, Ontario, Canada, covers this same subject and describes method of repair.) 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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