AD 79-12-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31 | Airworthiness Directives; Piper Models PA-31 Series |
| aircraft | Piper Aircraft Inc. | PA-31-300 | Airworthiness Directives; Piper Models PA-31 Series |
| aircraft | Piper Aircraft Inc. | PA-31-325 | Airworthiness Directives; Piper Models PA-31 Series |
| aircraft | Piper Aircraft Inc. | PA-31-350 | Airworthiness Directives; Piper Models PA-31 Series |
| aircraft | Piper Aircraft Inc. | PA-31P | Airworthiness Directives; Piper Models PA-31 Series |
| aircraft | Piper Aircraft Inc. | PA-31T | Airworthiness Directives; Piper Models PA-31 Series |
| aircraft | Piper Aircraft Inc. | PA-31T1 | Airworthiness Directives; Piper Models PA-31 Series |
Unsafe Condition
Possible restriction of elevator surface travel due to loose or damaged elevator stop bolts and lock nuts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove upper and lower tail cone halves to access elevator hinge assembly. Inspect elevator stop bolts and lock nuts for looseness, damage, or movement; repair or replace as needed. Verify elevator travel per service manual, torque lock nuts to 20-25 inch/pounds, apply slip stripe or torque seal, and reinstall tail cone. Report findings within 10 days if issues are found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 25 hours' time in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Models PA-31, PA-31-300, PA-31-325 (S/N 31-5 through 31-7912049), PA-31-350 (S/N 31-5001 through 31-7952091), PA-31P (S/N 31P-1 and up), PA-31T (S/N 31T-7400002 through 31T-7920060), and PA-31T1 (S/N 31T-7804001 through 31T-7904031)
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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