AD 2016-23-09
Effective 12/27/2016 · Published 11/22/2016
Airworthiness Directives; Various Restricted Category Helicopters
Summary
We are adopting a new airworthiness directive (AD) for various restricted category helicopters. This AD requires cleaning and visually inspecting certain main rotor (M/R) blades and, depending on the outcome of the inspections, repairing or replacing the M/R blades. This AD was prompted by a report of an M/R blade with multiple fatigue cracks around the blade retention bolt hole. The actions are intended to detect a…