Is AD 2021-09-19 a recurring Airworthiness Directive?

No — AD 2021-09-19 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2021-09-19

Q: Which aircraft does AD 2021-09-19 apply to?

AD 2021-09-19 applies to Airbus Sas — models A319-171N, A320-271N, A320-272N, A320-273N, A321-271N, A321-272N, A321-271NX, A321-272NX. Serial/part conditions may narrow it to specific aircraft.

one-time

Official AD 2021-09-19 · FR doc 2021-11726 · 2021-06-04 · airframe

Airworthiness Directives; Airbus SAS Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for all Airbus SAS Model A319-171N airplanes, Model A320-271N, -272N, and -273N airplanes, and Model A321-271N, -272N, -271NX, and -272NX airplanes. This AD was prompted by a report indicating that during a full scale fatigue test of the forward engine mounts, premature wear was identified on the forward engine mount shackle assemblies; in addition, during bearing replacement, the bearing lock washer was found broken. This AD requires replacing any forward engine mount shackle assemblies having a certain part number with a serviceable part, and re- identifying the engine mount, or replacing any forward engine mount assemblies having a certain part number, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-09-19 applies to

MakesAirbus Sas

ModelsA319-171N, A320-271N, A320-272N, A320-273N, A321-271N, A321-272N, A321-271NX, A321-272NX, A319, A320, A321

Whether AD 2021-09-19 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 2021-09-19 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.