Madrid - The Spanair MD-82 jetliner that crashed in Madrid on August 20 was started by the co-pilot, press reports said Thursday.
The reports quoted a preliminary report by a commission investigating the accident, which has been leaked to the media.
The plane crashed at the airport after take-off, killing 154 and injuring 18 people.
The information transmitted to the plane's black box originated in the computer of the 31-year-old co-pilot, who had more than 1,050 hours of experience flying similar planes, according to the daily El Pais.
It was not unusual for the captain and co-pilot to take turns during flights, sources of the aviation sector were quoted as saying.