AD 88-21-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aerostar Aircraft Corporation | PA-60-600 (Aerostar 600) | Airworthiness Directives; PIPER PA-60 Series Airplanes |
| aircraft | Aerostar Aircraft Corporation | PA-60-601 (Aerostar 601) | Airworthiness Directives; PIPER PA-60 Series Airplanes |
| aircraft | Aerostar Aircraft Corporation | PA-60-601P (Aerostar 601P) | Airworthiness Directives; PIPER PA-60 Series Airplanes |
| aircraft | Aerostar Aircraft Corporation | PA-60-602P (Aerostar 602P) | Airworthiness Directives; PIPER PA-60 Series Airplanes |
| aircraft | Aerostar Aircraft Corporation | PA-60-700P (Aerostar 700P) | Airworthiness Directives; PIPER PA-60 Series Airplanes |
Unsafe Condition
A possible inflight engine fire due to exhaust system issues on PA-60 series airplanes modified with STC SA980NM.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 50 hours time-in-service after the effective date, and every 100 hours thereafter, inspect and replace as necessary the exhaust systems and oil lines on both engines per Machen, Inc. SB No. 66-018. Repetitive inspections are no longer required if exhaust systems are modified per SB 66-019.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 50 hours time-in-service after the effective date, and thereafter at every 100 hours time-in-service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Aerostar Aircraft Corporation PA-60 series (all serial numbers) airplanes modified with Machen, Inc. STC SA980NM.
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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