No one, apparently. When pilot for Dutch airline Transavia returned from the bathroom, he realized that he was locked out of the Boeing 737 cockpit, with the first officer inside asleep!
According to a Dutch Safety Board report released Wednesday, the pilot stepped out of the cockpit to take a bathroom break about 2½ hours into the flight.
When he returned a short time later, the pilot used an intercom to ask his first officer to open the door. There was no answer, the report said.
Eventually, the pilot alerted the crew and was able to open the door himself. That's when he found the first officer asleep, according to the report.
"It's a serious incident," said Wim van der Weegen of the Dutch Safety Board, "What makes it serious is the combination of the pilot being unable to access the cockpit and the first officer being asleep.
"By 'serious incident,' I mean the flight was in danger," he said.
Thom Patterson of CNN reports: Link