Is AD 2021-16563 a recurring Airworthiness Directive?

No — AD 2021-16563 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-16563 apply to?

AD 2021-16563 applies to Airbus Canada Limited Partnership — models BD-500-1A10, BD-500-1A11, BD-500. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-16563

one-time

AD 2021-16563 · 2021-08-05 · airframe

Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500- 1A11 airplanes. This AD was prompted by reports of deficiencies in the primary flight control computer (PFCC) software and the remote electronics unit (REU) software. This AD requires installation of a software update to correct deficiencies in the PFCC and REU software, as specified in a Transport Canada Civil Aviation (TCCA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-16563 applies to

MakesAirbus Canada Limited Partnership

ModelsBD-500-1A10, BD-500-1A11, BD-500

Applies to airplanes identified in Transport Canada Civil Aviation (TCCA) AD CF-2020-36, dated October 8, 2020. Type certificate previously held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.

Whether AD 2021-16563 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 2021-16563 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.