Is AD 99-10644 a recurring Airworthiness Directive?

No — AD 99-10644 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-10644 apply to?

AD 99-10644 applies to Aerospatiale — models ATR72. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-10644

one-time

AD 99-10644 · 1999-05-04 · airframe

Airworthiness Directives; Aerospatiale Model ATR42 and ATR72 Series Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to all Aerospatiale Model ATR42 and ATR72 series airplanes. This action requires revising the Airplane Flight Manual to provide the flightcrew with modified procedures and limitations for operating in severe icing conditions. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to prevent the airplane from stalling due to prolonged exposure to severe icing conditions, which could result in reduced performance and controllability of the airplane.

Which aircraft AD 99-10644 applies to

MakesAerospatiale

ModelsATR72

modified

Whether AD 99-10644 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 99-10644 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.