AD 2021-20-16 Prompted By A Report That, During An Unscheduled Post-Flight Inspection Of The Tail Cone Area, A Crack Was Found...
The FAA is superseding Airworthiness Directive (AD) 2021-04-15, which applied to all Airbus Helicopters Model AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters; and certain Model AS350B3 helicopters. AD 2021-04-15 required repetitive visual inspections of the right-hand side of the vertical fin spar for discrepancies (cracking), and corrective action if necessary. This AD retains the requirements of AD 2021-04-15, and requires repetitive cleaning and repetitive detailed inspections for cracking of the vertical fin spar and vertical fin upper attachments, and corrective action if necessary, as specified i