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Airworthiness Directive 2019-21-03

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Official AD 2019-21-03 · FR doc 2019-24506 · 2019-11-13 · airframe

Airworthiness Directives; Bombardier, Inc., Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model CL-600-1A11 (600), CL-600-2A12 (601), and CL-600-2B16 (601-3A and 601-3R Variants) airplanes. This AD was prompted by reports of the loss of all air data system information provided to the flightcrew, which was caused by icing at high altitudes. This AD requires revising the existing airplane flight manual (AFM) to provide the flightcrew with procedures for "Unreliable Airspeed" that stabilize the airplane's airspeed and attitude. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2019-21-03 applies to

MakesBombardier
ModelsCL-600-1A11, CL-600-2A12, CL-600-2B16, CL-600
Serial-conditional — narrows to serials 1001–1085, 3001–3066, 5001–5194.

Serial ranges correspond respectively to: CL-600-1A11 (Model 600) serial numbers 1001-1085; CL-600-2A12 (Model 601) serial numbers 3001-3066; CL-600-2B16 (601-3A and 601-3R Variants) serial numbers 5001-5194.

Whether AD 2019-21-03 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 2019-21-03 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.