Superseded. This AD was superseded by AD 2021-18-06. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2021-11-03
Effective 07/15/2021 · Published 06/10/2021
Airworthiness Directives; Airbus Helicopters
Summary
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Model EC 155B, EC155B1, SA-365N, SA-365N1, AS-365N2, and AS 365 N3 helicopters, as identified in a European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD. This AD was prompted by a report of an in-flight loss of engine and main gearbox (MGB) cowlings. This AD requires inspecting the MGB fixed cowling…