Airworthiness Directives; Leonardo S.p.a. Helicopters

FAA / Federal Register · 2021-20825

The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. Model AB139 and AW139 helicopters. This AD was prompted by reports of spurious in-flight disconnections of the automatic flight control system (AFCS). This AD requires updating certain "Primus Epic" system software, as specified in a European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.