Alaska Airlines Flight 1542, operated by Alaska Airlines, crashed in Alaska’s Aleutian Islands on the evening of March 26, 1964.
The aircraft, an aircraft carrying an oil tanker, was carrying an amount of about 7,000 barrels of fuel to a tanker in the same area.
Alaska Airlines says it lost the fuel and the aircraft plunged into the sea.
In 1966, a joint investigation by the NTSB and the Alaska Air National Guard found the aircraft had experienced engine trouble that caused the engine to overheat.
The plane was flying over a dense, densely populated area when it went down.
The NTSB said the fuel could have come from a number of locations, including oil fields and other natural sources.
A separate investigation found the engine had failed to restart on several occasions and that the aircraft was on the wrong side of the runway.
The FAA said in a statement that the cause of the crash is still under investigation.
The crash remains classified as an accident and no criminal charges have been filed.
The wreckage was discovered by a crew member and an emergency technician.
The two survivors were taken to the hospital.
They were both treated for hypothermia.
It’s not clear if the plane was damaged or lost in the explosion.