AD 52-28-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | American Champion Aircraft Corp. | 11AC | Airworthiness Directives; Aeronca Model 11AC and S11AC Aircraft |
| aircraft | American Champion Aircraft Corp. | S11AC | Airworthiness Directives; Aeronca Model 11AC and S11AC Aircraft |
Unsafe Condition
Accidents have occurred due to misuse of the fuel transfer system when pilots attempted to transfer fuel during takeoff or climb, leading to potential fuel transfer failures.
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Required Actions
Install a placard near the fuel transfer system shutoff valve stating: 'Transfer fuel in level flight or glide only and when main tank is is half full or less. Valve is to be closed except while transferring fuel.'
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Compliance Time
not later than January 31, 1953
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Affected Aircraft
American Champion Aircraft Corp. Model 11AC and S11AC aircraft equipped with the Auxiliary Fuel Tank Installation.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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