Is AD 2020-05254 a recurring Airworthiness Directive?

No — AD 2020-05254 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2020-05254 apply to?

AD 2020-05254 applies to Airbus Canada, Bombardier — models BD-500-1A11, BD-500. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2020-05254

one-time

AD 2020-05254 · 2020-03-16 · 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-500-1A11 airplanes. This AD was prompted by reports that, under certain combinations of airplane configuration and flight conditions, higher than anticipated temperatures could lead to an engine fire warning nuisance message. This AD requires installation of Integrated Air Systems Controller (IASC) software version 5.0. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2020-05254 applies to

MakesAirbus CanadaBombardier

ModelsBD-500-1A11, BD-500

Serial-conditional — narrows to serials 55018–55019, 55022–55022, 55024–55024, 55026–55026, 55028–55028, 55031–55031, 55035–55035.

Limited to a specific, non-contiguous list of manufacturer serial numbers: 55018, 55019, 55022, 55024, 55026, 55028, 55031, 55035. Type certificate previously held by C Series Aircraft Limited Partnership (CSALP)/Bombardier, Inc.

Whether AD 2020-05254 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 2020-05254 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.