Air Vietnam Flight 706 was a Boeing 727 that crashed on September 15, 1974 after three hijackers detonated hand grenades as it was approaching Phan Rang Air Base in South Vietnam for an emergency landing. All 67 passengers and 8 crew members aboard the aircraft were killed in the crash.
Shortly before the plane exploded, the pilot radioed that the hijacker was pulling the pins on two grenades.[1] The aircraft overshot the base leg and initiated a left turn, during which it lost control. Shortly after that, it plunged to the ground from an altitude of 1,000 feet (300 m), killing all 75 people aboard.[2]