Is AD 99-06-05 a recurring Airworthiness Directive?

No — AD 99-06-05 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-06-05 apply to?

AD 99-06-05 applies to Pilatus — models PC-12. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-06-05

one-time

Official AD 99-06-05 · FR doc 99-5853 · 1999-03-12 · airframe

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

What this AD requires

This amendment adopts a new airworthiness directive (AD) that applies to certain Pilatus Aircraft Ltd. (Pilatus) Models PC-12 and PC- 12/45 airplanes. This AD requires removing the ``Alternate Flap System'' from the airplane flight controls and inserting a temporary revision that specifies this change in SECTION 2--LIMITATIONS of the PC-12 Pilot's Operating Handbook. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Switzerland. The actions specified by this AD are intended to preclude improper use of the ``Alternate Flap System'', which could result in flap asymmetry with consequent reduced or loss of control of the airplane.

Which aircraft AD 99-06-05 applies to

MakesPilatus

ModelsPC-12

Boilerplate applicability only; a broader model/serial-number list precedes this excerpt, though the text directly references the PC-12 Pilot's Operating Handbook. Requires removing the 'Alternate Flap System' from the flight controls per Pilatus Service Bulletin No. 27-004 (September 15, 1998) and inserting a POH Limitations temporary revision, to prevent flap asymmetry and reduced/loss of control from improper use of that system.

Whether AD 99-06-05 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 99-06-05 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.