Is AD 2021-26-23 a recurring Airworthiness Directive?

No — AD 2021-26-23 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-26-23 apply to?

AD 2021-26-23 applies to Bombardier — models CL-600-2B16, CL-600. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-26-23

one-time

Official AD 2021-26-23 · FR doc 2022-02881 · 2022-02-11 · airframe

Airworthiness Directives; Bombardier, Inc., Airplanes; Correction

What this AD requires

The FAA is correcting an airworthiness directive (AD) that was published in the Federal Register. That AD applies to certain Bombardier, Inc., Model CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes. As published, the AD number specified in the regulatory text is incorrect. This document corrects that error and one other minor error. In all other respects, the original document remains the same.

Which aircraft AD 2021-26-23 applies to

MakesBombardier

ModelsCL-600-2B16, CL-600

Serial-conditional — narrows to serials 5301–5665, 5701–5990, 6050–6163.

Covers 601-3A, 601-3R, and 604 Variants of the CL-600-2B16.

Whether AD 2021-26-23 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 2021-26-23 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.