Iran Air Flight 291 was a flight that crash landed on January 21, 1980. The plane, a Boeing 727-86, was making a flight from Mashad Airport to Tehran-Mehrabad Airport in Iran. At 19:11 local time, the plane crashed into the Alborz Mountains, 29 kilometres (18 mi) north of Tehran, during its approach to Tehran-Mehrabad runway 29 in foggy and snowy weather conditions. All 8 crew members and 120 passengers died in the incident, and the plane was destroyed. At the time, Iran Air Flight 291 was the deadliest aircraft disaster in Iranian history.