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Airworthiness Directive 2021-24544

one-time
AD 2021-24544 · 2021-11-12 · airframe

Airworthiness Directives; Airbus Helicopters

What this AD requires

The FAA is removing Airworthiness Directive (AD) 2021-05-02, which applied to all Airbus Helicopters Model AS350B, AS350BA, AS350B1, AS350B2, AS350B3, AS350C, and AS350D helicopters; Model AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters; and Model EC130B4 and EC130T2 helicopters. AD 2021-05-02 required determining whether the helicopter has been operated in a severe environment since the last inspection of the main rotor hub-to-mast attachment screws, an inspection of the main rotor hub-to-mast attachment screws if the helicopter has been operated in a severe environment, and replacement of the main rotor hub-to-mast attachment screws if necessary, as specified in a European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD, which was incorporated by reference. Since the FAA issued AD 2021-05- 02, reported inspection results and further investigation have confirmed that the report of failed main rotor hub-to-mast attachment screws, which prompted AD 2021-05-02, was an isolated case which resulted from a maintenance mistake. Therefore, the FAA has determined that no unsafe condition is likely to exist or develop on the main rotor hub-to-mast attachment screws on other helicopters in the fleet. Accordingly, AD 2021-05-02 is removed.

Which aircraft AD 2021-24544 applies to

MakesAirbus Helicopters
ModelsAS350B, AS350BA, AS350B1, AS350B2, AS350B3, AS350C, AS350D, AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP, EC130B4, EC130T2, AS350, AS355, EC130

Whether AD 2021-24544 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 2021-24544 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.