Is AD 2017-04-03 a recurring Airworthiness Directive?

No — AD 2017-04-03 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2017-04-03 apply to?

AD 2017-04-03 applies to Pilatus — models PC-6-H1, PC-6-H2, PC-6/350, PC-6/350-H1, PC-6/350-H2, PC-6/A, PC-6/A-H1, PC-6/A-H2. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2017-04-03

one-time

Official AD 2017-04-03 · FR doc 2017-03719 · 2017-03-03 · airframe

Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for Pilatus Aircraft Ltd. Models PC-6, PC-6-H1, PC-6-H2, PC-6/350, PC-6/350-H1, PC- 6/350-H2, PC-6/A, PC-6/A-H1, PC-6/A-H2, PC-6/B-H2, PC-6/B1-H2, PC-6/B2- H2, PC-6/B2-H4, PC-6/C-H2, and PC-6/C1-H2 airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as certain combinations of the aileron counterweight and the attaching parts possibly resulting in reduced thread engagement and leading to disconnection of the aileron counterweight from the aileron. We are issuing this AD to require actions to address the unsafe condition on these products.

Which aircraft AD 2017-04-03 applies to

MakesPilatus

ModelsPC-6-H1, PC-6-H2, PC-6/350, PC-6/350-H1, PC-6/350-H2, PC-6/A, PC-6/A-H1, PC-6/A-H2, PC-6/B-H2, PC-6/B1-H2, PC-6/B2-H2, PC-6/B2-H4, PC-6/C-H2, PC-6/C1-H2, PC-6

Applies to all manufacturer serial numbers (MSN), including MSN 2001 through 2092. For MSN 2001-2092, these airplanes are also identified as Fairchild Republic Company PC-6, Fairchild Industries PC-6, Fairchild Heli Porter PC-6, or Fairchild-Hiller Corporation PC-6 airplanes.

Whether AD 2017-04-03 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:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.

Date — When the work was done.

Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.

Signature & certificate — The A&P/IA who returned it to service, with certificate number.

Is AD 2017-04-03 complied with on your aircraft?

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.