Is AD 83-21-05 a recurring Airworthiness Directive?

No — AD 83-21-05 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 83-21-05 apply to?

AD 83-21-05 applies to Airbus — models A300. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 83-21-05

one-time

AD 83-21-05 · 1983-01-01 · appliance

Airworthiness Directives; certificated in all categories. To prevent loss of all airspeed indications, accomplish the following within the next 1800 flight

Which aircraft AD 83-21-05 applies to

MakesAirbus

ModelsA300

To prevent loss of all airspeed indications, modify the pitot probe heater within 1,800 flight hours after the effective date, unless already accomplished; equivalent-safety alternatives may be approved by the Seattle ACO; special flight permits allowed.

Whether AD 83-21-05 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 83-21-05 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 →

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.