AD 68-20-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31 | Airworthiness Directives; PIPER Model Piper PA-31 and PA-31-300 Aircraft. |
| aircraft | Piper Aircraft Inc. | PA-31-300 | Airworthiness Directives; PIPER Model Piper PA-31 and PA-31-300 Aircraft. |
Unsafe Condition
Cracks in the elevator torque tube P/N 40070-02 of the elevator torque tube assembly P/N 40070-00 due to deformation or fatigue.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the elevator torque tube P/N 40070-02 for deformation or cracking prior to next flight. Remove the torque tube assembly P/N 40070-00 within 25 hours' time in service after the effective date (September 27, 1968) and inspect using dye penetrant, magnetic particle, x-ray, or FAA-approved equivalent. Repeat inspections within 100 hours' time in service. Replace any cracked or deformed torque tube with a new part, which must be inspected if P/N 40070-02.
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Compliance Time
Prior to next flight and within 25 hours' time in service after September 27, 1968, with subsequent inspections within 100 hours' time in service from the last inspection.
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Affected Aircraft
Piper Aircraft Inc. PA-31 and PA-31-300 aircraft with serial numbers: 31-2 to 31-74 inclusive; 31-76 to 31-131 inclusive; 31-133 to 31-144 inclusive; 31-146 to 31-184 inclusive; 31-186 to 31-247 inclusive; 31-249 to 31-299 inclusive.
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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