Is AD 2018-21-05 a recurring Airworthiness Directive?

No — AD 2018-21-05 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2018-21-05 apply to?

AD 2018-21-05 applies to Airbus — models A319-131, A319-132, A319-133, A320-231, A320-232, A320-233, A321-131, A321-231. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-21-05

one-time

Official AD 2018-21-05 · FR doc 2018-21963 · 2018-10-15 · airframe

Airworthiness Directives; Airbus SAS Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Airbus SAS Model A319-131, A319-132, A319-133, A320-231, A320-232, A320-233, A321-131, A321-231, and A321-232 airplanes. This AD was prompted by reports of fan cowl door (FCD) losses during take-off. This AD requires modification and re-identification, or replacement, of certain FCDs, and installation of a placard in the flight deck. We are issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2018-21-05 applies to

MakesAirbus

ModelsA319-131, A319-132, A319-133, A320-231, A320-232, A320-233, A321-131, A321-231, A321-232, A319, A320, A321

Applies only if modified by Bombardier Short Brothers, PLC Supplemental Type Certificate (STC) ST03076NY.

Whether AD 2018-21-05 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 2018-21-05 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 →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.