Is AD 2021-21097 a recurring Airworthiness Directive?

No — AD 2021-21097 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-21097 apply to?

AD 2021-21097 applies to Ruag Aerospace Services Gmbh — models Dornier 228-212, Dornier 228. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-21097

one-time

AD 2021-21097 · 2021-09-30 · airframe

Airworthiness Directives; RUAG Aerospace Services GmbH (Type Certificate Previously Held by Dornier Luftfahrt GmbH) Airplanes

What this AD requires

The FAA is superseding Airworthiness Directive (AD) 2007-02- 13, which applied to certain Dornier Luftfahrt GmbH (type certificate currently held by RUAG Aerospace Services GmbH) Model Dornier 228-212 airplanes. AD 2007-02-13 required inspecting the landing gear carbon brake assembly. This AD requires inspecting certain carbon brake assemblies and corrective actions if necessary. This AD was prompted by mandatory continuing airworthiness information (MCAI) issued by the European Union Aviation Safety Agency (EASA) to correct an unsafe condition on an aviation product. The MCAI identifies the unsafe condition as loose bolts and nuts on the landing gear carbon brake assembly. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-21097 applies to

MakesRuag Aerospace Services Gmbh

ModelsDornier 228-212, Dornier 228

Type certificate previously held by Dornier Luftfahrt GmbH. Applies to all serial numbers.

Whether AD 2021-21097 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 2021-21097 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.