Is AD 99-22535 a recurring Airworthiness Directive?

No — AD 99-22535 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-22535 apply to?

AD 99-22535 applies to De Havilland Inc. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-22535

one-time

AD 99-22535 · 1999-08-31 · turboprop engine

Airworthiness Directives; de Havilland Inc. Models DHC-6-1, DHC- 6-100, DHC-6-200, and DHC-6-300 Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that applies to all de Havilland Inc. Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 airplanes. This AD requires amending the Limitations Section of the airplane flight manual (AFM) to prohibit the positioning of the power levers aft of the flight idle stop while the airplane is in flight. The AFM amendment includes a statement of consequences if the limitation is not followed. This AD is a result of numerous incidents and five documented accidents involving airplanes equipped with turboprop engines where the propeller beta was improperly utilized during flight. None of the incidents or accidents involved de Havilland Inc. Models DHC-6-1, DHC-6-100, DHC-6- 200, and DHC-6-300 airplanes. The actions specified by this AD are intended to prevent loss of airplane control or engine overspeed with consequent loss of engine power caused by the power levers being positioned aft of the flight idle stop while the airplane is in flight.

Which aircraft AD 99-22535 applies to

MakesDe Havilland Inc

equipped with

Whether AD 99-22535 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 99-22535 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.