Is AD 2024-15657 a recurring Airworthiness Directive?

No — AD 2024-15657 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2024-15657

Q: Which aircraft does AD 2024-15657 apply to?

AD 2024-15657 applies to De Havilland Aircraft Of Canada Limited — models DHC-8-401, DHC-8-402, DHC-8. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 2024-15657 · 2024-07-17 · airframe

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited Model DHC-8-401 and - 402 airplanes. This AD was prompted by reports of moisture in the wing- to-fuselage joint, between the mating front spar and rear spar frame segments. This AD requires a visual inspection of the fuselage front and rear spar frames, an ultrasonic test if applicable, other specified actions, and repair if necessary. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2024-15657 applies to

MakesDe Havilland Aircraft Of Canada Limited

ModelsDHC-8-401, DHC-8-402, DHC-8

Serial-conditional — narrows to serials 4001–4001, 4003–4624.

Type certificate previously held by Bombardier, Inc.

Whether AD 2024-15657 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 2024-15657 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.