Airworthiness Directive 2021-04-03
one-timeAirworthiness Directives; Pilatus Aircraft Ltd. Airplanes
What this AD requires
The FAA is adopting a new airworthiness directive (AD) for certain Pilatus Aircraft Ltd. (Pilatus) Model PC-24 airplanes. This AD was prompted by mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI identifies the unsafe condition as improperly manufactured cockpit and cabin evaporator filters installed during production on some PC-24 airplanes. The FAA is issuing this AD to address the unsafe condition on these products.
Which aircraft AD 2021-04-03 applies to
Applies to all PC-24 serial numbers with any of the listed evaporator filter assemblies installed (cockpit P/N 959.90.20.291 / alt PC24EC-6068-1; cabin front P/N 959.90.20.290 / alt PC24EC-6287-1; cabin bottom P/N 959.90.20.288 / alt PC24EC-6288-1; cabin top P/N 959.90.20.289 / alt PC24EC-6297-1), or if the P/N of the evaporator filter assembly is unknown.
Whether AD 2021-04-03 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.