What happened
On the night of the accident, Pan Am Flight 212, an Boeing 747 registered as N779PA, departed Dulles Airport with 136 passengers and a crew of 9. The flight proceeded normally under instrument conditions until it reached the New York area. As the aircraft approached Kennedy International Airport, controllers provided weather updates indicating low visibility due to fog, with a runway visual range of approximately 1,600 feet on runway 4R.
During the approach phase, the aircraft was vectored toward the final approach course for runway 4R. The Precision Approach Radar (PAR) controller monitored the ILS approach as the aircraft passed the outer marker. At 23:01:45, the local controller cleared the flight to land, noting that preceding traffic would be clear shortly. The PAR controller subsequently issued a warning for the crew to execute a missed approach if the runway was not in sight.
Following this instruction, the aircraft touched down on the runway. However, the pilot was unable to stop the plane within the remaining pavement. The Boeing 747 continued down the runway, crossed the asphalt overrun, and traveled through a sandy area before coming to rest in the shallow waters of Thurston Basin, roughly 800 feet beyond the end of the runway. The impact caused the aircraft to break into two sections.
Despite the structural failure, the crew managed an evacuation. Passengers in the forward section exited via the main door, while those in the rear utilized overwing exits and life rafts. Out of the 145 occupants, there were 40 injuries, including seven serious injuries, while 105 people remained unhurt.
Findings
The accident was caused by the captain's deviation from the glide slope during the ILS approach. This maneuver resulted in a touchdown at a point and speed that made it impossible to stop the aircraft on the remaining runway surface.