Is AD 2021-10-25 a recurring Airworthiness Directive?

No — AD 2021-10-25 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-10-25 apply to?

AD 2021-10-25 applies to Airbus Helicopters — models EC130B4, EC130T2, EC130. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-10-25

one-time

Official AD 2021-10-25 · FR doc 2021-11393 · 2021-06-01 · airframe

Airworthiness Directives; Airbus Helicopters

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Model EC130B4 and EC130T2 helicopters. This AD was prompted by a report of cracks and geometrical non-conformities of the tail rotor blades (TRBs); all cracks initiated in the drain hole area at the blade root section. This AD requires cleaning affected parts, visual and dye penetrant inspections for cracks of affected parts, a dimensional inspection to verify conformity of affected parts, and corrective actions if necessary, 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 2021-10-25 applies to

MakesAirbus Helicopters

ModelsEC130B4, EC130T2, EC130

Part-conditional — 350A33-3002-02, 350A33-3002-03, 350A33-3002-04, 350A33-3002-05.

Applies to helicopters with a tail rotor blade (TRB), obtained by forging, of the listed part numbers installed.

Whether AD 2021-10-25 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 2021-10-25 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.