Is AD 99-33168 a recurring Airworthiness Directive?

No — AD 99-33168 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-33168 apply to?

AD 99-33168 applies to Bombardier — models CL-600-2A12, CL-600-2B16. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-33168

one-time

AD 99-33168 · 1999-12-28 · airframe

Airworthiness Directives; Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL- 604) Series Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to certain Bombardier Model CL-600-1A11 (CL-600), CL-600- 2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) series airplanes, that requires, for certain airplanes, removing the hydraulic tube assemblies from the main landing gear (MLG) bay, installing new re-routed hydraulic tube assemblies, and repositioning a fuel line, as applicable. For certain other airplanes, this amendment requires a general visual inspection to determine the routing of certain hydraulic and fuel lines, and repair, if necessary. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent damage to hydraulic and fuel lines resulting from failure of an MLG, which could cause a fire in the MLG wheel well.

Which aircraft AD 99-33168 applies to

MakesBombardier

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

certain

Whether AD 99-33168 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 99-33168 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.