Is AD 2020-24258 a recurring Airworthiness Directive?

No — AD 2020-24258 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2020-24258 apply to?

AD 2020-24258 applies to Bell — models 412, 412CF, 412EP. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2020-24258

one-time

AD 2020-24258 · 2020-11-03 · airframe

Airworthiness Directives; Bell Textron Inc. (Type Certificate Previously Held by Bell Helicopter Textron Inc.) Helicopters

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for all Bell Textron Inc. (Type Certificate previously held by Bell Helicopter Textron Inc.) Model 412, 412CF, and 412EP helicopters. This AD requires revising the existing Rotorcraft Flight Manual (RFM) for your helicopter. This AD was prompted by an accident and multiple reports of a cracked main gearbox (MGB) support case. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2020-24258 applies to

MakesBell

Models412, 412CF, 412EP

Note 1 to paragraph (c): Helicopters with a 412EPI or 412EPX designation are Model 412EP helicopters.

Whether AD 2020-24258 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 2020-24258 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.