What’s the cause of the AW139 electrical fire   

An occurrence was reported of smoke and fire ignition in the cockpit of an AW139 helicopter, leading to reduced control. The initial investigation evidence revealed signs of short circuit inside the forward cabin roof ceiling panel, due to chafing of an electrical cable against the rivets of the upper torque tube. It was determined that the chafed electrical cable was not routed in accordance with the applicable production drawings. Investigation is still ongoing to determine the root cause of the event.