Is AD 2021-10-24 a recurring Airworthiness Directive?

No — AD 2021-10-24 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-10-24 apply to?

AD 2021-10-24 applies to Leonardo S.P.A. — models A109A, A109A II, A109. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-10-24

one-time

Official AD 2021-10-24 · FR doc 2021-10191 · 2021-05-14 · airframe

Airworthiness Directives; Leonardo S.p.a. (Type Certificate Previously Held by Agusta S.p.A.) Helicopters

What this AD requires

The FAA is superseding Airworthiness Directive (AD) 2015-25-04 for Agusta S.p.A (now Leonardo S.p.a.) Model A109A and A109A II helicopters. AD 2015-25-04 required inspecting the slider assembly pitch control (slider) for play and replacing the slider if the play exceeds certain limits. This AD was prompted by further investigation that led to the determination that the play was caused by a manufacturing issue. This AD retains certain requirements of AD 2015- 25-04, requires replacing certain part-numbered sliders as a terminating action for the inspections, and prohibits installing the affected part on any helicopter. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-10-24 applies to

MakesLeonardo S.P.A.

ModelsA109A, A109A II, A109

Part-conditional — 109-0130-11-7.

Applies to helicopters with a slider assembly pitch control part number 109-0130-11-7 installed, except those sliders marked with an "R" after the serial number.

Whether AD 2021-10-24 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 2021-10-24 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.