AD 80-18-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-23 | Airworthiness Directives; Piper Model PA-23, PA-23-160, PA-23-235, PA-23-250, PA-E23-250, PA-31, PA-31-300, PA-31-325, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-23-160 | Airworthiness Directives; Piper Model PA-23, PA-23-160, PA-23-235, PA-23-250, PA-E23-250, PA-31, PA-31-300, PA-31-325, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-23-235 | Airworthiness Directives; Piper Model PA-23, PA-23-160, PA-23-235, PA-23-250, PA-E23-250, PA-31, PA-31-300, PA-31-325, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-23-250 | Airworthiness Directives; Piper Model PA-23, PA-23-160, PA-23-235, PA-23-250, PA-E23-250, PA-31, PA-31-300, PA-31-325, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-23-250 (Navy UO-1) | Airworthiness Directives; Piper Model PA-23, PA-23-160, PA-23-235, PA-23-250, PA-E23-250, PA-31, PA-31-300, PA-31-325, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31 | Airworthiness Directives; Piper Model PA-23, PA-23-160, PA-23-235, PA-23-250, PA-E23-250, PA-31, PA-31-300, PA-31-325, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-300 | Airworthiness Directives; Piper Model PA-23, PA-23-160, PA-23-235, PA-23-250, PA-E23-250, PA-31, PA-31-300, PA-31-325, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-325 | Airworthiness Directives; Piper Model PA-23, PA-23-160, PA-23-235, PA-23-250, PA-E23-250, PA-31, PA-31-300, PA-31-325, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-350 | Airworthiness Directives; Piper Model PA-23, PA-23-160, PA-23-235, PA-23-250, PA-E23-250, PA-31, PA-31-300, PA-31-325, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31P | Airworthiness Directives; Piper Model PA-23, PA-23-160, PA-23-235, PA-23-250, PA-E23-250, PA-31, PA-31-300, PA-31-325, PA-31-350, and PA-31P Airplanes |
Unsafe Condition
Malfunction of the fuel valves or fuel valve cable assemblies could cause possible engine power loss.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect fuel selector valves and control cables for binding, sticking, cracks, bends, kinks, and proper lubrication. Replace cables with adverse conditions, correct unsatisfactory rigging, and install new 'O' rings from Piper Kit No. 760-504 as specified. Lubricate and inspect for leaks, ensuring proper system rigging and tank selection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance is required as indicated unless already accomplished. For paragraph (a), prior to the next flight and at intervals not exceeding 10 hours time in service until compliance with paragraph (c). Paragraph (b) requires accomplishment within 100 hours' time in service after the effective date, and thereafter every 100 hours. Paragraph (c) must be done within 100 hours time in service after the effective date (unless already within last 900 hours), and thereafter every 1,000 hours time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Models PA-23, PA-23-160, PA-23-235, PA-23-250, PA-E23-250, PA-31, PA-31-300, PA-31-325, PA-31-350, and PA-31P with specific serial ranges, equipped with Scott fuel selector valves (excluding Dukes valves).
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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