AD 80-14-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31T | Airworthiness Directives; Piper Model PA-31T Airplanes |
Unsafe Condition
Undesirable high altitude (above 20,000 feet) Longitudinal Dynamic Stability (Phugoid) Characteristics
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Incorporate the applicable Airplane Flight Manual/Pilot's Operating Handbook Revision as listed in Piper Instructions 31T-6 (dated February 5, 1979) or PFL-31T-790228 (dated August 17, 1979). Submit substantiating data through an FAA Maintenance Inspector for potential adjustment of inspection intervals.
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Compliance Time
within 25 hours in service after the effective date of this AD unless already accomplished
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Affected Aircraft
Piper Model PA-31T, Serial Numbers 31T-7400002 thru 31T-7620057 and PA-31T-7720001 thru 31T-7920004 certificated in all categories
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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