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.
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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.
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Compliance Time
not later than December 1, 1952
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Affected Aircraft
Univair Aircraft Corporation Models 415-C and -CD with a 5.00x4 nose wheel and using Federal Skis.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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