Summary
We propose to supersede Airworthiness Directive (AD) 2016-25- 19 for Airbus Helicopters (previously Eurocopter France) Model AS350B3 and EC130B4 helicopters. AD 2016-25-19 requires inspecting the pilot's and co-pilot's throttle twist for proper operation. This proposed AD would retain the requirements of AD 2016-25-19 and add certain model helicopters to the applicability. The actions of this proposed AD are intended to address the unsafe condition on these helicopters.