Is AD 2020-21-21 a recurring Airworthiness Directive?

No — AD 2020-21-21 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2020-21-21 apply to?

AD 2020-21-21 applies to Leonardo — models A109E, A109S, A119, AW109SP, AW119MKII, A109, AW109, AW119. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2020-21-21

one-time

Official AD 2020-21-21 · FR doc 2020-23019 · 2020-10-20 · airframe

Airworthiness Directives; Leonardo S.p.a. Helicopters

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for Leonardo S.p.a. (Leonardo) Model A109E, A109S, A119, AW109SP, and AW119MKII helicopters. This AD requires removing certain main rotor (M/ R) floating ring assemblies from service. This AD also prohibits replacing any washer on any M/R floating ring assembly. This AD was prompted by a report of a washer debonding from the M/R floating ring assembly. The actions of this AD are intended to address an unsafe condition on these products.

Which aircraft AD 2020-21-21 applies to

MakesLeonardo

ModelsA109E, A109S, A119, AW109SP, AW119MKII, A109, AW109, AW119

Part-conditional — 109-0111-09-101, 109-0111-09-103.

Applies only to helicopters with main rotor (M/R) floating ring assembly P/N 109-0111-09-101 or P/N 109-0111-09-103 installed.

Whether AD 2020-21-21 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 2020-21-21 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.