Is AD 2017-22-08 a recurring Airworthiness Directive?

No — AD 2017-22-08 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2017-22-08 apply to?

AD 2017-22-08 applies to Bombardier — models CL-600-2C10, CL-600-2D15, CL-600-2D24, CL-600-2E25, CL-600. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2017-22-08

one-time

Official AD 2017-22-08 · FR doc 2017-23346 · 2017-11-06 · airframe

Airworthiness Directives; Bombardier, Inc., Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model CL-600-2C10 (Regional Jet Series 700, 701, & 702), Model CL-600-2D15 (Regional Jet Series 705), Model CL-600-2D24 (Regional Jet Series 900), and Model CL-600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted by a report indicating that a number of rubber bull gear (RBG) wheels installed in the horizontal stabilizer trim actuator (HSTA) were manufactured using an incorrect material specification. This AD requires replacement of the affected RBG wheels. We are issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2017-22-08 applies to

MakesBombardier

ModelsCL-600-2C10, CL-600-2D15, CL-600-2D24, CL-600-2E25, CL-600

Part-conditional — 8489-7, 8489-7R.

Applies only to airplanes equipped with horizontal stabilizer trim actuator (HSTA) part number 8489-7 or 8489-7R. Model designations correspond to Regional Jet Series 700/701/702 (CL-600-2C10), 705 (CL-600-2D15), 900 (CL-600-2D24), and 1000 (CL-600-2E25).

Whether AD 2017-22-08 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 2017-22-08 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.