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Airworthiness Directive 2026-06-01

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Official AD 2026-06-01 · FR doc 2026-05098 · 2026-03-16 · 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 AB139 and AW139 helicopters with a certain supplemental type certificate (STC) installed. This AD was prompted by the absence of instructions on the information placards located next to the rear-facing seats to lock the seat headrest in the highest position during takeoff and landing. This AD requires revising the existing rotorcraft flight manual supplement (RFMS) and replacing the information placard with one that specifies instructions for locking the seat headrest. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2026-06-01 applies to

MakesLeonardo S.P.A.
ModelsAB139, AW139
Serial-conditional — narrows to serials 31087–31087, 31133–31133, 31269–31269, 31305–31305, 31351–31351, 31502–31502, 31712–31712, 31735–31735, 31757–31757, 31865–31865, 31869–31869, 41582–41582, 41583–41583.

Applies only to helicopters modified in accordance with Supplemental Type Certificate (STC) SR00049IB.

Whether AD 2026-06-01 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 2026-06-01 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.