AD 60-10-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-18 | Airworthiness Directives; Piper Models All PA- 22, PA-20, and PA-18 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-18-105 (Special) | Airworthiness Directives; Piper Models All PA- 22, PA-20, and PA-18 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-18-125 (Army L-21A) | Airworthiness Directives; Piper Models All PA- 22, PA-20, and PA-18 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-18-135 | Airworthiness Directives; Piper Models All PA- 22, PA-20, and PA-18 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-18-150 | Airworthiness Directives; Piper Models All PA- 22, PA-20, and PA-18 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-18A | Airworthiness Directives; Piper Models All PA- 22, PA-20, and PA-18 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-18A-135 | Airworthiness Directives; Piper Models All PA- 22, PA-20, and PA-18 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-18A-135 (Restricted) | Airworthiness Directives; Piper Models All PA- 22, PA-20, and PA-18 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-18A-150 | Airworthiness Directives; Piper Models All PA- 22, PA-20, and PA-18 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-18A-150 (Restricted) | Airworthiness Directives; Piper Models All PA- 22, PA-20, and PA-18 Airplanes |
Unsafe Condition
Failure of the fuel selector valve (P/N 11383) due to improper centering of the detent pin or inverted spring retaining washer, leading to loss of detent action and potential engine fuel starvation from improper selector positioning.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Cycle the fuel selector valve to verify four distinct detents. Replace the valve prior to further flight if detent engagement is not positive. Reposition the indicator plate if handle position does not align with markings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to July 15, 1960, and every 100 hours' time in service thereafter
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Affected Aircraft
Piper Models All PA-22, PA-20, and PA-18 Airplanes equipped with two wing tanks.
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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