Is AD 2021-06205 a recurring Airworthiness Directive?

Yes — AD 2021-06205 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Airworthiness Directive 2021-06205

Q: Which aircraft does AD 2021-06205 apply to?

AD 2021-06205 applies to Airbus Helicopters Deutschland Gmbh — models BO-105A, BO-105C, BO-105S, BO-105LS A-1, BO-105LS A-3, BO-105. Serial/part conditions may narrow it to specific aircraft.

recurring

AD 2021-06205 · 2021-03-26 · airframe

Airworthiness Directives; Airbus Helicopters Deutschland GmbH (Type Certificate Previously Held by Eurocopter Deutschland GmbH and Eurocopter Canada Ltd.) Helicopters

What this AD requires

The FAA is superseding Airworthiness Directive (AD) 97-26-02 for Eurocopter Deutschland GmbH Model BO-105A, BO-105C, BO-105S, BO- 105LS A-1, and BO-105LS A-3 helicopters; and Eurocopter Canada Ltd. Model BO-105LS A-3 helicopters. AD 97-26-02 required a repetitive visual inspection for cracks in the ribbed area of the main rotor (M/R) mast flange (flange), and depending on the outcome, replacing the M/R mast. This new AD retains the requirements of AD 97-26-02 and removes the reinforced M/R mast from the applicability. This AD was prompted by the determination that a certain reinforced M/R mast is not affected by the unsafe condition. The actions of this AD are intended to address an unsafe condition on these products.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2021-06205 applies to

MakesAirbus Helicopters Deutschland Gmbh

ModelsBO-105A, BO-105C, BO-105S, BO-105LS A-1, BO-105LS A-3, BO-105

Part-conditional — 4619 305 032, 4638 205 005, 4639 305 002, 4639 205 017.

Applies only when M/R mast P/N 4619 305 032 (of M/R mast assembly P/N 4638 205 005) or M/R mast P/N 4639 305 002 (of M/R mast assembly P/N 4639 205 017) is installed. M/R mast assembly P/N 4639 205 017 may also contain reinforced M/R mast P/N 4639 305 095, which is NOT affected by this AD. Replaces AD 97-26-02.

Whether AD 2021-06205 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

Supersession

Supersedes AD 97-26-02.

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 2021-06205 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.