Airworthiness Directive · Amendment 39-12524 · Eurocopter France Model EC 120 Helicopters
Eurocopter France Model EC 120 Helicopters
Model EC120B helicopters, serial number 1169 and below, with a cabin sliding door rail, part number C533C8102201, C533C8102202, C533C8103201, or C533C8103202, installed, certificated in any category.
This amendment supersedes an existing airworthiness directive (AD) that applies to Eurocopter France (ECF) Model EC120B helicopters and currently requires adjusting the clearance of the cabin sliding door if necessary. This amendment requires 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 amendment is prompted by an in-flight loss of a cabin sliding door, which had been locked in the open position. The actions specified by this 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.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
