AD 52-25-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Univair Aircraft Corporation | 415-C | Airworthiness Directives; Ercoupe Models 415-C and -CD Aircraft |
| aircraft | Univair Aircraft Corporation | 415-CD | Airworthiness Directives; Ercoupe Models 415-C and -CD Aircraft |
Unsafe Condition
The nose ski can come off when operating on Federal Aircraft Works Model A-1500 skis due to the retaining nut backing off if the lock washer fails.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a supplementary safety device, such as a rectangular plate (1/8-inch thick, 1/2-inch longer than axle diameter) on the axle stub, secured by a safetied through bolt to prevent the retaining nut from backing off. The plate must allow visual inspection of the retaining nut.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than December 1, 1952
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Univair Aircraft Corporation Models 415-C and -CD with a 5.00x4 nose wheel and using Federal Skis.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Nose Wheel and Skis.
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_52-25-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 52-25-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Ercoupe Models 415-C and -CD Aircraft Subject: Nose Wheel and Skis. Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Univair Aircraft Corporation Model: 415-C | 415-CD Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 52-25-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 52-25-02 SUBJECT HEADING: Airworthiness Directives; Ercoupe Models 415-C and -CD Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 52-25-02 ERCOUPE: Applies to Models 415-C and -CD Aircraft Having a 5.00x4 Nose Wheel and Using Federal Skis. To be accomplished not later than December 1, 1952. To eliminate instances of the nose ski coming off when operating on Federal Aircraft Works Model A-1500 skis, a supplementary safety device should be installed. A simple and suitable device is a rectangular plate (approximately 1/8-inch thick and 1/2-inch longer than axle diameter) installed to end of axle stub so that ends of plate will prevent retaining nut from backing off if lock washer fails. This plate, which will also provide for visual inspection of retaining nut, to be held in place by a safetied through bolt. This modification can easily be made and installed in the field. Drawing (No. ES-B-203) describing such an installation is available from Federal Aircraft Works, Minneapolis, Minn. (Federal Service Bulletin No. 100 also covers this subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_52-25-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 52-25-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Ercoupe Models 415-C and -CD Aircraft Subject: Nose Wheel and Skis. Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Univair Aircraft Corporation Model: 415-C | 415-CD 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: 52-25-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 52-25-02 SUBJECT HEADING: Airworthiness Directives; Ercoupe Models 415-C and -CD Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 52-25-02 ERCOUPE: Applies to Models 415-C and -CD Aircraft Having a 5.00x4 Nose Wheel and Using Federal Skis. To be accomplished not later than December 1, 1952. To eliminate instances of the nose ski coming off when operating on Federal Aircraft Works Model A-1500 skis, a supplementary safety device should be installed. A simple and suitable device is a rectangular plate (approximately 1/8-inch thick and 1/2-inch longer than axle diameter) installed to end of axle stub so that ends of plate will prevent retaining nut from backing off if lock washer fails. This plate, which will also provide for visual inspection of retaining nut, to be held in place by a safetied through bolt. This modification can easily be made and installed in the field. Drawing (No. ES-B-203) describing such an installation is available from Federal Aircraft Works, Minneapolis, Minn. (Federal Service Bulletin No. 100 also covers this subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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