The co-pilot of the Germanwings aircraft that crashed into the French Alps two months back is believed to have practiced a rapid descent on the same plane on a previous flight, according to a report by French investigators.
According to BBC, the report claimed that Lubitz set the same plane for an unauthorized descent earlier on the same day.
The Germanwings co-pilot is suspected of intentionally crashing the Airbus 320 into the French Alps, killing all 150 people on board.
He is believed to have practiced rapid descent on the flight from Duesseldorf to Barcelona on 24 March, the preliminary report by accident investigation agency BEA said.
The changes apparently happened over a five-minute period at about 07:30 starting 30 seconds after the captain left the cockpit.