Is AD 2023-17-51 a recurring Airworthiness Directive?

No — AD 2023-17-51 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2023-17-51 apply to?

AD 2023-17-51 applies to Bell Textron Canada Limited — models 407. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2023-17-51

one-time

Official AD 2023-17-51 · FR doc 2023-19324 · 2023-09-06 · airframe

Airworthiness Directives; Bell Textron Canada Limited Helicopters

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for all Bell Textron Canada Limited Model 407 helicopters. The FAA previously sent this AD as an emergency AD to all known U.S. owners and operators of these helicopters. This AD was prompted by a report of a disbonded area in a tail rotor (T/R) blade. This AD requires determining if an affected T/R blade is installed, inspecting each of those T/R blades and, depending on the results, replacing the T/R blade as specified in a Transport Canada emergency AD, which is incorporated by reference. This AD also limits the installation of T/R blades to certain T/R blades. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2023-17-51 applies to

MakesBell Textron Canada Limited

Models407

Whether AD 2023-17-51 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 2023-17-51 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.