# AD 52-25-02: Nose Wheel and Skis.

- Type: Airworthiness directive
- Status: Current
- Products: Univair 415-C and 415-CD
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 873 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0BD584F720EEC14D86256A5700480E4E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/52-25-02

## The airworthiness directive

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.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-718](https://openairdocs.org/tcds/A-718): Univair Aircraft Corporation; names 2 of 2 models: 415-CD, 415-C

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 873 (873 by airframe model, 0 by engine model)
- Makers: Ercoupe 671, Engineering & Research 176, Forney 18, Erco 8

Models with the most aircraft:

- [Ercoupe 415-C](https://openairdocs.org/model/ercoupe-415-c): 623 aircraft (airframe model)
- [Engineering & Research 415-C](https://openairdocs.org/model/engineering-research-415-c): 160 aircraft (airframe model)
- [Ercoupe 415-CD](https://openairdocs.org/model/ercoupe-415-cd): 48 aircraft (airframe model)
- [Forney 415-C](https://openairdocs.org/model/forney-415-c): 17 aircraft (airframe model)
- [Engineering & Research 415-CD](https://openairdocs.org/model/engineering-research-415-cd): 16 aircraft (airframe model)
- [Erco 415-C](https://openairdocs.org/model/erco-415-c): 7 aircraft (airframe model)
- [Forney 415-CD](https://openairdocs.org/model/forney-415-cd): 1 aircraft (airframe model)
- [Erco 415-CD](https://openairdocs.org/model/erco-415-cd): 1 aircraft (airframe model)

All 8 models: https://openairdocs.org/ad/52-25-02/models.md
Every aircraft: https://openairdocs.org/ad/52-25-02/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.