"I was shovelled out of the plane by the pilot's door, while she went out to face the press, " Tatham recalls.

BBC: Dame Margot Fonteyn and the Panama sanitary towel coup

The pilot's door is usually open at that time, police said.

CNN: Pilot wannabe gets nonstop ride to jail

On receipt of a warning, the pilot would make sure the cockpit door was locked and immediately begin landing procedures.

CNN: Task force recommends strong air security measures

After the captain returned to the cockpit, the co-pilot quickly persuaded him to leave again, Mr. Antolino said, allowing the off-duty pilot to slip into the cockpit and lock the door.

WSJ: JetBlue Captain's 'Medical Situation' Diverts Flight

They'll only have permission to lend to one person at a time for each copy, although Macmillan's comments to LibraryJournal leave the door open to changing terms should the pilot struggle to gain traction.

ENGADGET: Macmillan tests selling e-books to libraries in two-year stretches

Eventually, the pilot alerted the crew and was able to open the door himself.

CNN: Dutch 737 pilot locked out of cockpit while co-pilot sleeps

When he returned a short time later, the pilot used an intercom to ask his first officer to open the door.

CNN: Dutch 737 pilot locked out of cockpit while co-pilot sleeps