Is AD 2021-28579 a recurring Airworthiness Directive?

Yes — AD 2021-28579 requires a repetitive inspection every 12 months. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2021-28579 apply to?

AD 2021-28579 applies to Airbus Defense And Space S.A. — models CN-235, CN-235-100, CN-235-200, CN-235-300. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-28579

recurring

AD 2021-28579 · 2022-01-11 · airframe

Airworthiness Directives; Airbus Defense and Space S.A. (Formerly Known as Construcciones Aeronauticas, S.A.) Airplanes

What this AD requires

The FAA is superseding Airworthiness Directive (AD) 2018-25- 16, which applied to certain Airbus Defense and Space S.A. Model CN- 235, CN-235-200, and CN-235-300 airplanes. AD 2018-25-16 required revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. Since the FAA issued AD 2018-25-16, the FAA has determined that additional new or more restrictive airworthiness limitations, including inspections for discrepancies (cracking) of certain structural elements, are necessary. This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate additional new or more restrictive airworthiness limitations, and repetitive inspections for discrepancies (cracking) of certain structural elements and corrective actions; 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.

Repetitive inspection. Re-inspect every 12 months. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2021-28579 applies to

MakesAirbus Defense And Space S.A.

ModelsCN-235, CN-235-100, CN-235-200, CN-235-300

Formerly known as Construcciones Aeronauticas, S.A.

Whether AD 2021-28579 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 2021-28579 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.