Pakistan International Airlines Flight 740 was a Hajj pilgrimage flight of Pakistan International Airlines from Kano, Nigeria to Karachi, Pakistan with a stop in Jeddah, Saudi Arabia. On 26 November 1979, the Boeing 707-340C serving the route crashed shortly after takeoff from Jeddah International Airport. All 156 people on board died. Before the crash, the pilot radioed a request to return to Jeddah because smoke was coming into the cabin and cockpit. 15 minutes later, Jeddah control tower heard the pilot shout "Mayday! Mayday!" before the radio went silent. The cause of the crash was a fire.