Summary
This document proposes the supersedure of an existing airworthiness directive (AD) for Eurocopter France (ECF) Model EC120B helicopters. That AD currently requires adjusting the clearance of the cabin sliding door if necessary. This action would require adding an end stop to the front rail and modifying the rear stop of the middle rail to increase its adjustment range for certain cabin sliding doors. This proposal is prompted by an in-flight loss of a cabin sliding door, which had been locked in the open position. The actions specified by the proposed AD are intended to prevent in-flight loss of a cabin sliding door, impact with the horizontal stabilizer or fenestron tail rotor, and subsequent loss of control of the helicopter.