Is AD 2021-10-27 a recurring Airworthiness Directive?

No — AD 2021-10-27 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2021-10-27

Q: Which aircraft does AD 2021-10-27 apply to?

AD 2021-10-27 applies to Bae Systems — models BAe 146-100A, BAe 146-200A, BAe 146-300A, Avro 146-RJ70A, Avro 146-RJ85A, Avro 146-RJ100A, BAe 146, Avro RJ. Serial/part conditions may narrow it to specific aircraft.

one-time

Official AD 2021-10-27 · FR doc 2021-10068 · 2021-05-13 · airframe

Airworthiness Directives; BAE Systems (Operations) Limited Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for all BAE Systems (Operations) Limited Model BAe 146 and Model Avro 146-RJ series airplanes. This AD was prompted by a report indicating that during a routine battery capacity check on the emergency light power units, the printed circuit boards (PCBs) for certain power units were found to show signs of burning. This AD requires replacing each Honeywell emergency light power unit having a certain part number with a serviceable emergency light power unit. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-10-27 applies to

MakesBae Systems

ModelsBAe 146-100A, BAe 146-200A, BAe 146-300A, Avro 146-RJ70A, Avro 146-RJ85A, Avro 146-RJ100A, BAe 146, Avro RJ

Whether AD 2021-10-27 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 2021-10-27 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.