UPDATE 1-AirAsia captain left seat before jet lost control -sources
January 31, 2015 at 06:51 AM EST
SINGAPORE/JAKARTA/PARIS, Jan 31 (Reuters) - The captain of the AirAsia jet that crashed into the sea in December was out of his seat conducting an unusual procedure when his co-pilot apparently lost control, and by the time he returned it was too late to save the plane, two people familiar with the investigation said.