Airworthiness Directive 2004-25-18
one-timeAirworthiness Directives; Pratt & Whitney Canada PT6A-60A and PT6A-65B Turboprop Engines
What this AD requires
The FAA is adopting a new airworthiness directive (AD) for Pratt & Whitney Canada (PWC) PT6A-60A and PT6A-65B turboprop engines. This AD requires replacing Woodward propeller governor assemblies, part number (P/N) 8210-212H. This AD results from six incidents during airplane acceptance flight testing where directional control of the airplane was difficult to maintain during landing. We are issuing this AD to prevent loss of directional control and damage to the airplane.
Which aircraft AD 2004-25-18 applies to
Applies to PT6A-60A engines with SN before and including PCE-PK0425, and SNs PCE-95006 through PCE-95828; and PT6A-65B engines (including engines converted to PT6A-65B) with SN before and including PCE-PP0062, and SNs PCE-32001 through PCE-32644; only when Woodward propeller governor assembly P/N 8210-212H is installed.
Whether AD 2004-25-18 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.