AD 86-25-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Alexandria Aircraft, LLC | 17-30 | Airworthiness Directives; Bellanca Model 17-30, 17-30A, 17-31, 17-31A, 17-31TC and 17-31ATC Airplanes |
| aircraft | Alexandria Aircraft, LLC | 17-30A | Airworthiness Directives; Bellanca Model 17-30, 17-30A, 17-31, 17-31A, 17-31TC and 17-31ATC Airplanes |
| aircraft | Alexandria Aircraft, LLC | 17-31 | Airworthiness Directives; Bellanca Model 17-30, 17-30A, 17-31, 17-31A, 17-31TC and 17-31ATC Airplanes |
| aircraft | Alexandria Aircraft, LLC | 17-31A | Airworthiness Directives; Bellanca Model 17-30, 17-30A, 17-31, 17-31A, 17-31TC and 17-31ATC Airplanes |
| aircraft | Alexandria Aircraft, LLC | 17-31ATC | Airworthiness Directives; Bellanca Model 17-30, 17-30A, 17-31, 17-31A, 17-31TC and 17-31ATC Airplanes |
| aircraft | Alexandria Aircraft, LLC | 17-31TC | Airworthiness Directives; Bellanca Model 17-30, 17-30A, 17-31, 17-31A, 17-31TC and 17-31ATC Airplanes |
Unsafe Condition
Engine power loss due to the accumulation of water or other contaminants in the fuel system from wing main and auxiliary fuel tanks lacking an FAA approved drain valve.
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Required Actions
Install a flush quick drain valve (P/N F391-18 or equivalent) by draining the tank, removing the drain plug (AN 932-2), installing the valve, and checking for leaks. Fabricate and install a placard stating 'DRAIN ALL FUEL SUMPS BEFORE FIRST FLIGHT OF EACH DAY.'
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Compliance Time
within the next 50 hours time-in-service after the effective date of this AD
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Affected Aircraft
Bellanca Model 17-30 (all serial numbers), 17-30A (S/Ns 30-263 thru 30-977), 17-31 (all serial numbers), 17-31A (S/Ns 32-15 thru 32-172), 17-31TC (all serial numbers), and 17-31ATC (S/Ns 31-004 thru 31-155). Serial numbers may be prefixed by a two-digit year of manufacture.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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