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Airworthiness Directive 2025-09-10

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Official AD 2025-09-10 · FR doc 2025-08283 · 2025-05-12 · airframe

Airworthiness Directives; Leonardo S.p.A. Helicopters

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.A. Model A109E, A109S, and AW109SP helicopters. This AD was prompted by reports of incorrect installation of the motor (MTR) cables and the bonding braids connected to the engine fire extinguisher bottles. This AD requires inspecting the cables and bonding braids installation and, depending on the results, accomplishing corrective action, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2025-09-10 applies to

MakesLeonardo S.P.A.
ModelsA109E, A109S, AW109SP, A109, AW109
Serial-conditional — narrows to serials 22202–22202, 22088–22088, 22701–22741, 22743–22746, 22748–22748, 22201–22201, 22203–22203, 22214–22362, 22364–22460, 22462–22464.
Part-conditional — 109G0000F01.

Per paragraphs (c)(1)-(4): (1) A109E, all S/N; (2) A109S without Trekker Kit P/N 109G0000F01 installed, all S/N; (3) A109S with Trekker Kit P/N 109G0000F01 installed, only the specific S/N listed; (4) AW109SP, only the specific S/N listed.

Whether AD 2025-09-10 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 2025-09-10 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.