article_snippet: The captain, somehow locked out of the cockpit, can be heard banging on the door, Marseille prosecutor Brice Robin said.
article_snippet: The pilot and co-pilot had normal exchanges during the beginning of the flight, Marseille prosecutor Brice Robin said.
article_snippet: When pilot and co-pilot stepped out to go to the bathroom, pilot and co-pilot asked Lubitz to take over.
article_snippet: It's unclear whether pilot and co-pilot entered a code to try to get back into the cockpit when pilot and co-pilot returned, or whether Lubitz "put the lever on lock," which would have prevented the code from working, Spohr said.
article_snippet: The most plausible explanation of what happened next is that Lubitz, "through deliberate abstention, refused to open the cabin door ... to pilot and co-pilot, and used the button" to cause the plane to lose altitude, Marseille prosecutor Brice Robin said.
article_snippet: The co-pilot was "fully qualified to pilot the aircraft on The co-pilot own," Robin said.