High Quality Content by WIKIPEDIA articles! Pan Am Flight 812, a Boeing 707-321B, was a scheduled international flight from Hong Kong to Sydney, Australia with an intermediate stop at Denpasar, Bali, Indonesia. On April 22, 1974 it crashed into a rough mountainous terrain while preparing for a runway 09 approach to Denpasar after a 4 hour 20 minutes flight from Hong Kong. Location of the accident is about 42.5 nautical miles (78.7 km) North-West of Ngurah Rai International Airport.