AD 47-21-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sky Enterprises, Inc. | RC-3 | Airworthiness Directives; Republic Model RC-3 Aircraft |
Unsafe Condition
The radio filter's condenser may be insufficiently secured, leading to a short circuit risk due to improper installation or inadequate fastening methods.
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Required Actions
Inspect the radio filter mounted on the left-hand rear engine baffle. Rework or replace filters in steel boxes (4x2 inches) if the condenser is glued in place without a 1 1/8-inch clamp or if the coil is not bolted to the box. Install a 1 1/8-inch clamp for glued condensers or replace with Republic P/N SK-17-83053-1 if the coil isn't bolted to the box.
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Compliance Time
as soon as possible, but not later than July 1, 1947
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Affected Aircraft
Sky Enterprises, Inc. Model RC-3 Aircraft, serial numbers 488 to 602 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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