AD 85-05-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31P | Airworthiness Directives; Piper Model PA-31P Airplanes |
Unsafe Condition
Propagation of cracks in the fuselage bulkhead at station 332.0 and loss of stabilizer front spar structural support.
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Required Actions
Within 25 hours time-in-service after the effective date, and every 200 hours thereafter, inspect the fuselage station 332.0 bulkhead using dye-penetrant method per Piper S/B No. 802. If cracks exist within acceptable limits, stop drill cracks and install Reinforcement Kit (P/N 764-983) or reinforced bulkhead (P/N 45583-16). If cracks exceed limits, replace bulkhead with P/N 45583-16. Repetitive inspections may stop after installing specified parts. Adjust inspection intervals up to 10% for maintenance coordination.
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, and thereafter at intervals not exceeding 200 hours time-in-service
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Affected Aircraft
Piper Model PA-31P (Serial Numbers 31P-3 through 31P-7730012)
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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