Pratt & Whitney PT6A — Airworthiness Directives & known issues
The Pratt & Whitney PT6A is installed on 2,226 registered aircraft. These are the Airworthiness Directives that apply to the engine family — whichever airframe it’s bolted to.
Engine ADs for the Pratt & Whitney PT6A
No engine ADs resolved for this family from the corpus — installed accessories (mags, carburetor, prop) can carry their own ADs, checked per aircraft.
Exact applicability (by engine serial and installed parts) and compliance come from the aircraft’s engine logs.
Known issues on the PT6A
On P&W PT6 engines the compressor-turbine (CT) blades, vanes and hot-section are condition/life items. A hot-section inspection (HSI) at the recommended interval, borescope findings, and any sulfidation history (coastal/marine operation accelerates it) are the load-bearing engine records. Verify HSI compliance and whether the engine is on P&W ESP.
Tailplate reads a tail number’s logbooks — engine ADs matched to compliance, time since overhaul vs TBO, and the whole records picture.
Look up a tail number →Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination.