Pan Am 707 SFO
Pan Am flight 843 experienced an explosive disintegration of the third stage turbine disk of the No. 4 engine. The accident occurred shortly after takeoff from San Francisco, at an altitude of about 800 feet above the ground.
Disintegration of the turbine disk was followed by a fire in the No. 4 engine area and an explosion in the outboard
reserve fuel tank. The No. 4 engine and approximately 25 feet of the right outer wing separated from the aircraft.
The fire was extinguished and a successful emergency landing was accomplished at Travis Air Force Base, California, with no injuries to the 143 passengers or 10 crewmembers aboard the flight