Iran Air Flight 291 was a flight from Mashad Airport to Tehran-Mehrabad Airport that crashed on 21 January 1980 during its approach to Tehran-Mehrabad runway 29 in foggy and snowy weather conditions, killing all 128 people on board. At the time, Iran Air Flight 291 was the deadliest aircraft disaster in Iranian history.

Aircraft

The aircraft involved was Boeing 727-86 with registration EP-IRD (factory no. 19817, serial no. 537) was built in 1968 and made its first flight on 17 February. The aircraft was powered by three Pratt & Whitney JT8D-7B

turbofan The turbofan or fanjet is a type of airbreathing jet engine that is widely used in aircraft engine, aircraft propulsion. The word "turbofan" is a portmanteau of "turbine" and "fan": the ''turbo'' portion refers to a gas turbine engine which ac ...

engines.

Accident

On the day of the accident, Iranian air traffic controllers went on strike, which led to hundreds of domestic flights being cancelled. Then at 16:00 the strike was interrupted, and flights resumed. At 17:40, Flight 291 departed from Mashad Airport bound for Tehran-Mehrabad Airport in Iran. There were 8 crew members and 120 passengers on board (initial reports stated that there were 8 crew members and 116 passengers). At 18:52 local time, the controller at Mehrabad airport in Tehran gave the crew a direct approach to the runway 29. Then at about 19:05, the dispatcher instructed the crew to take a 360° heading to reach the non-directional beacon of the Varamin approach. Without receiving instructions from the controller, the pilots were to the north off course. During the approach, the first officer told the captain that the VORTAC was giving the wrong radial course, but he did not respond to this message. At 19:11 local time, the aircraft collided with the

Alborz Mountains The Alborz ( fa, البرز) range, also spelled as Alburz, Elburz or Elborz, is a mountain range in northern Iran that stretches from the border of Azerbaijan along the western and entire southern coast of the Caspian Sea and finally runs nort ...

, north of

Tehran Tehran (; fa, تهران ) is the largest city in Tehran Province and the capital of Iran. With a population of around 9 million in the city and around 16 million in the larger metropolitan area of Greater Tehran, Tehran is the most popul ...

. All 8 crew members and 120 passengers died in the crash, and the plane was destroyed.

Cause

Investigators concluded that the probable cause of the crash was believed to be an inoperable

instrument landing system In aviation, the instrument landing system (ILS) is a precision radio navigation system that provides short-range guidance to aircraft to allow them to approach a runway at night or in bad weather. In its original form, it allows an aircraft to ...

and ground

radar Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, w ...

. The head of Iran's Civil Aviation Authority and five other officials were charged with manslaughter as a result of the crash of Flight 291.

References

External links

Airport situation following the crash
from ''

Associated Press The Associated Press (AP) is an American non-profit news agency headquartered in New York City. Founded in 1846, it operates as a cooperative, unincorporated association. It produces news reports that are distributed to its members, U.S. newspa ...

Archive'' {{Portal bar, Aviation, Iran, 1980s Airliner accidents and incidents involving controlled flight into terrain Accidents and incidents involving the Boeing 727 Airliner accidents and incidents caused by instrument failure Airliner accidents and incidents caused by weather Aviation accidents and incidents in 1980 Aviation accidents and incidents in Iran January 1980 events in Asia 1980 in Iran 291