Is AD 2018-20-17 a recurring Airworthiness Directive?

Yes — AD 2018-20-17 requires a repetitive inspection every 8800 hours. Next-due depends on the aircraft's time in service.

Airworthiness Directive 2018-20-17

Q: Which aircraft does AD 2018-20-17 apply to?

AD 2018-20-17 applies to Bombardier, Inc. — models CL-600-2C10, CL-600-2D15, CL-600-2D24, CL-600-2E25, CL-600. Serial/part conditions may narrow it to specific aircraft.

recurring

Official AD 2018-20-17 · FR doc 2018-22136 · 2018-10-16 · airframe

Airworthiness Directives; Bombardier, Inc., Airplanes

What this AD requires

We are superseding Airworthiness Directive (AD) 2012-22-10, which applied to certain Bombardier, Inc., Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes, Model CL-600-2D24 (Regional Jet Series 900) airplanes, and Model CL-600-2E25 (Regional Jet Series 1000) airplanes. AD 2012-22-10 required repetitive inspections to determine that cotter pins are installed at affected wing-to-fuselage attachment joints and replacement if necessary. This AD retains the initial inspection of the wing-to-fuselage attachment joints, and removes the repetitive inspections of all but the forward keel beam attachment joint. This AD also changes the repetitive inspection interval for the forward keel beam attachment joint. This AD was prompted by a determination that additional nuts of the forward keel beam attachment joint should be inspected, and that repetitive inspections of certain wing-to-fuselage attachment joints are not necessary. We are issuing this AD to address the unsafe condition on these products.

Repetitive inspection. Re-inspect every 8800 hours. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2018-20-17 applies to

MakesBombardier, Inc.

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

Serial-conditional — narrows to serials 10002–?, 15001–?, 19001–?.

CL-600-2C10 (Regional Jet Series 700/701/702) SN 10002 and subsequent; CL-600-2D15 (Regional Jet Series 705) and CL-600-2D24 (Regional Jet Series 900) SN 15001 and subsequent; CL-600-2E25 (Regional Jet Series 1000) SN 19001 and subsequent.

Whether AD 2018-20-17 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 2018-20-17 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.