The captain asked Mr. Lubitz to take over the controls and left the cockpit for a short time, possibly to use the bathroom.

10:31 to 10:41

The captain is heard begging to get back into the cockpit, but Mr. Lubitz does not react, and appeared to have locked him out, Mr. Robin said. “You can hear the commanding pilot ask for access to the cockpit several times,” the prosecutor said. “He identifies himself, but the co-pilot does not provide any answer.”