A military plane crash in Spain was probably caused by computer files being accidentally wiped from three of its engines, according to investigators.
Plane-maker Airbus discovered anomalies in the A400M’s data logs after the crash, suggesting a software fault.
And it has now emerged that Spanish investigators suspect files needed to interpret its engine readings had been deleted by mistake.
This would have caused the affected propellers to spin too slowly.
The aeroplane crashed near Seville, during a test flight on 9 May, killing four crew members on board.
Several countries that had already accepted deliveries of the plane - including the UK - grounded them following the accident.
However, Airbus has announced it plans to fly one of its own A400M aircraft at the Paris Air Show next week.