Or he had a heart attack ack ack...
“I outta know by now. Who needs a house out in Hackensack?”
But....remember...this is the copilot about whom the airline has offered no information that I can find. Not even a name.
Big heads up. A pilot CANNOT get locked out of the cockpit, unless the remaining pilot means to lock him out. I can’t disclose how, but suffice it to say there are features to prevent a remaining pilot from locking out by incapacitation. The remaining pilot had to FORCE the outside pilot to stay locked out. Definitely suicide. Likely Amish.
Or he went to help the flight attendants who were having trouble..
You oughta know by now.