ATR-72 Veered Off Runway After Captain’s Seat Moved Fully Backwards

From Aviation Safety Network

Starbow flight S9 104, an ATR 72-500, suffered a runway excursion during takeoff from Accra-Kotoka Airport in Ghana.

During take off roll from runway 21 and before reaching a speed of 70 kts, the captain's seat suddenly moved full backwards violently and shifted to the left. Whilst controlling the aircraft with the nose wheel steering, the violent seat movement led to the captain turning the tiller to the left causing the aircraft to veer off the left side of the runway. The captain could not gain control of the aircraft until it came to a stop close to the perimeter fence after efforts by the copilot to retard the power levers.

All propeller blades of the no.1 engine were damaged with some prop tips severed after impacting barbed wire at the airport perimeter fence.
Five occupants sustained minor injuries.

The aircraft, 9G-SBF, had only been delivered to Starbow on 22 November 2017.