Is AD 2016-21-06 a recurring Airworthiness Directive?

Yes — AD 2016-21-06 requires a repetitive inspection every 24 months. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2016-21-06 apply to?

AD 2016-21-06 applies to Bombardier — models CL-600-1A11, CL-600-2A12, CL-600-2B16, CL-600. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2016-21-06

recurring

Official AD 2016-21-06 · FR doc 2016-25009 · 2016-11-14 · airframe

Airworthiness Directives; Bombardier, Inc. Airplanes

What this AD requires

We are superseding Airworthiness Directive (AD) 2015-02-23, for certain Bombardier, Inc. Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A and CL-601-3R Variants) airplanes. AD 2015-02-23 required repetitive inspections for fractured or incorrectly oriented fasteners on the inboard flap hinge-box forward fittings on both wings, and replacement of all fasteners if necessary. This new AD also requires replacement of the fasteners, which terminates the requirements of this AD. This AD was prompted by reports of incorrectly oriented fasteners. We are issuing this AD to prevent incorrectly oriented or fractured fasteners, which could result in detachment of the flap hinge-box and the flap surface, and consequent reduced controllability of the airplane.

Repetitive inspection. Re-inspect every 24 months. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2016-21-06 applies to

MakesBombardier

ModelsCL-600-1A11, CL-600-2A12, CL-600-2B16, CL-600

Serial-conditional — narrows to serials 1004–1085, 3001–3066, 5001–5194.

CL-600-1A11 = CL-600; CL-600-2A12 = CL-601; CL-600-2B16 = CL-601-3A and CL-601-3R Variants.

Whether AD 2016-21-06 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 2016-21-06 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.