Is AD 99-43 a recurring Airworthiness Directive?

No — AD 99-43 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-43 apply to?

AD 99-43 applies to Pilatus — models 45, PC-12. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-43

one-time

AD 99-43 · 1999-01-05 · airframe

Airworthiness Directives; Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 Airplanes; Correction

What this AD requires

This document makes a correction to Airworthiness Directive (AD) 98-11-01 R2, which was published in the Federal Register on July 31, 1998 (63 FR 40807), and concerns Pilatus Aircraft Ltd. (Pilatus) Models PC-12 and PC-12/45 airplanes. Certain references to the AD number and amendment number in the document are incorrect. The AD currently requires replacing the fuel tank vent valves and drilling a 4.8 millimeter (0.1875 inch) hole in each fuel filler cap on certain Pilatus Models PC-12 and PC-12/45 airplanes. AD 98-11-01 R2 also requires inserting a temporary revision in the Pilot's Operating Handbook (POH) that specifies checking to assure that the fuel filler cap hole is clear of ice and foreign objects. This action corrects the AD to reflect the correct reference to the AD number and amendment number throughout the entire document.

Which aircraft AD 99-43 applies to

MakesPilatus

Models45, PC-12

Certain

Whether AD 99-43 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 99-43 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.