On 17 December 1973, Pan Am Flight 110 was scheduled to fly from Leonardo da Vinci International Airport in Rome to Beirut International Airport in Lebanon and then on to Tehran, Iran. At the controls of the Boeing 707-321B (registration N407PA,[4] name Clipper Celestial)[1] were Captain Andrew Erbeck,[6] First Officer Robert Davison, and Flight engineer Kenneth Pfrang.[3][8]