AD 77-12-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-28-235 | Airworthiness Directives; Piper Models PA-28-235, PA-32-260, PA-32-300, and PA-32S-300 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-32-260 | Airworthiness Directives; Piper Models PA-28-235, PA-32-260, PA-32-300, and PA-32S-300 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-32-300 | Airworthiness Directives; Piper Models PA-28-235, PA-32-260, PA-32-300, and PA-32S-300 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-32S-300 | Airworthiness Directives; Piper Models PA-28-235, PA-32-260, PA-32-300, and PA-32S-300 Airplanes |
Unsafe Condition
Fuel system malfunction and possible power interruption due to internal leaking fuel selector valves, improper fuel tank fill caps, unmodified fuel selector control systems, misaligned fuel tank vent tubes, and improperly installed fuel hose assemblies.
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Required Actions
Inspect fuel selector valve and perform drain checks, replace non-compliant fuel tank fill caps with Piper Part Number 66817-00, modify fuel selector control system per Service Bulletin 376, rework vent tubes to specified angles and install new vent assemblies, and inspect/replace twisted fuel hose assemblies. Actions must be repeated at intervals not exceeding 50 hours time in service.
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Compliance Time
within the next five hours time in service after the effective date of this A.D. and thereafter before the first flight of each day until (b), (c), (d) and (e) are accomplished and thereafter at intervals not to exceed 50 hours time in service from the last check
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Affected Aircraft
Piper Models PA-28-235, PA-32-260, PA-32-300, and PA-32S-300 with specified serial ranges, equipped with Airborne Model 1H10, 1H16-1, 1H26-2, 1H26-3, or 1H26-4 fuel selector valves or without Piper fuel valve kits 757 148V or 760 895V.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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