Serious incident to the Sikorsky S76 registered EC-JES on 26/07/2019 at Vigo [Investigation led by CIAIAC / Spain]
Descente non commandée sans déclenchement d'alarme
Responsible entity
Preliminary data based on the notification from the Spanish authorities:
During the positioning for a training and validation exercise of a winch operator, the aircraft came to be down 50ft above sea level without sound warnings.