Is AD 2020-09-01 a recurring Airworthiness Directive?

Yes — AD 2020-09-01 requires a repetitive inspection every 25 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2020-09-01 apply to?

AD 2020-09-01 applies to Airbus Helicopters — models AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2020-09-01

recurring

Official AD 2020-09-01 · FR doc 2020-08531 · 2020-04-23 · airframe

Airworthiness Directives; Airbus Helicopters (Previously Eurocopter France)

What this AD requires

The FAA is superseding Airworthiness Directive (AD) 2008-24-04 for Eurocopter France (now Airbus Helicopters) Model AS355E, AS355F, AS355F1, AS355F2, and AS355N helicopters. AD 2008-24-04 required repetitively inspecting the lubricating pump and checking the magnetic chip detector plug (chip detector) and the main gearbox (MGB) oil-sight glass. This new AD retains the requirements of AD 2008-24-04 and allows the option of altering the MGB oil flow distribution as a terminating action for the inspections. This AD was prompted by an alteration developed by Airbus Helicopters of the MGB oil flow distribution that corrects the unsafe condition. The actions of this AD are intended to address an unsafe condition on these products.

Repetitive inspection. Re-inspect every 25 hours. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2020-09-01 applies to

MakesAirbus Helicopters

ModelsAS355E, AS355F, AS355F1, AS355F2, AS355N, AS355

Part-conditional — 355A32-0700-01, 355A32-0700-02, 355A32-0701-00.

Applies to helicopters with main gearbox (MGB) lubrication pump P/N 355A32-0700-01, 355A32-0700-02, or 355A32-0701-00 installed, except helicopters with Modification (MOD) 077222 installed. Manufacturer previously Eurocopter France.

Whether AD 2020-09-01 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 2020-09-01 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.