AD 60-03-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-23 | Airworthiness Directives; Piper Models PA-23 and PA-23 "160" Aircraft |
| aircraft | Piper Aircraft Inc. | PA-23-160 | Airworthiness Directives; Piper Models PA-23 and PA-23 "160" Aircraft |
Unsafe Condition
Fuel system cable malfunctioning and fuel valve leakage in the main, auxiliary, and crossfeed valves could lead to improper fuel valve operation or fuel leakage, compromising engine operation and fuel system integrity.
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Required Actions
Inspect fuel cells for fuel containment and check electric fuel pump operation while cycling fuel selectors and crossfeed valves to detect leakage. Repair any leakage found. Check control cable rigging and clamping to eliminate bowing and ensure proper valve operation. For aircraft with improved valves (P/N 492050 and 492051), verify correct valve installation combinations as specified.
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Compliance Time
Compliance with item (a) required by March 15, 1960, and every 50 hours of time in service thereafter until improved valves are installed; after installation, inspections every 100 hours. Compliance with item (b) required by March 15, 1960, and every 50 hours of time in service until new cables installed; thereafter every 100 hours. Item (c) must be complied with not later than 25 hours' time in service after October 19, 1960.
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Affected Aircraft
Piper Models PA-23 and PA-23-160 aircraft, serial numbers 23-1 and up. Specific serial ranges include 23-1 through 23-1695 for item (a), 23-1 through 23-289 for item (b), and 23-1 through 23-1695 for item (c).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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