AD 75-11-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Alexandria Aircraft, LLC | 17-31 | Airworthiness Directives; Bellanca Model 17-31, 17-31TC, 17-31A and 1731ATC Airplanes |
| aircraft | Alexandria Aircraft, LLC | 17-31A | Airworthiness Directives; Bellanca Model 17-31, 17-31TC, 17-31A and 1731ATC Airplanes |
| aircraft | Alexandria Aircraft, LLC | 17-31ATC | Airworthiness Directives; Bellanca Model 17-31, 17-31TC, 17-31A and 1731ATC Airplanes |
| aircraft | Alexandria Aircraft, LLC | 17-31TC | Airworthiness Directives; Bellanca Model 17-31, 17-31TC, 17-31A and 1731ATC Airplanes |
Unsafe Condition
Failure of the check valve (P/N 19121-206) in the vapor return line could result in engine power failure due to fuel vapor lock.
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Required Actions
Remove the check valve, disassemble and remove the internal check ball, reassemble without the ball, remark the valve housing with a yellow stripe, reinstall in the vapor return line, and make log book entries. Procedures vary by model year with specific disassembly steps for models up to 1972, 1973, and 1974/1975.
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Compliance Time
within the next 25 hours time in service after the effective date of this AD
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Affected Aircraft
Bellanca Model 17-31 (S/N 32-1), 17-31TC (all serials), 17-31A (S/N 32-21 through 75-32-159 except S/N 32-25), and 17-31ATC (S/N 31004 through S/N 75-31116)
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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