In aviation, instrument flight rules (IFR) is one of two sets of regulations governing all aspects of civil aviation aircraft operations; the other is visual flight rules (VFR).
Trans World Airlines (TWA) Flight 553 was a McDonnell Douglas DC-9-15 jet airliner, registration N1063T, operated by Trans World Airlines on March 9, 1967 between Pittsburgh, Pennsylvania and Dayton, Ohio. While descending toward Dayton about 29 miles from the airport, the flight collided in midair with a Beechcraft Baron, a small, general-aviation airplane, near Urbana, Ohio. All 25 aboard the DC-9 and the sole occupant of the Beechcraft were killed.
American Airlines Flight 383 was a nonstop flight from New York City to Cincinnati on November 8, 1965. The aircraft was a Boeing 727, with 57 passengers, and 5 crew on board. The aircraft crashed on final approach to the Cincinnati/Northern Kentucky International Airport located in Hebron, Kentucky, United States. Only three passengers and one flight attendant survived the crash.
Mohawk Airlines Flight 411, a Fairchild FH-227B twin-engine turboprop, registered N7811M, was a scheduled domestic passenger service operated by Mohawk Airlines, between Albany and Glens Falls, New York. On November 19, 1969, it crashed into Pilot Knob Mountain, killing all 14 passengers and crew on board.
Hughes Airwest Flight 706 was a regularly scheduled flight operated by American domestic airline Hughes Airwest from Los Angeles, California to Seattle, Washington, with several intermediate stops. On Sunday, June 6, 1971, the McDonnell Douglas DC-9 serving as Flight 706 departed Los Angeles just after 6 p.m. en route to Seattle as a McDonnell Douglas F-4 Phantom II of the United States Marine Corps was approaching Marine Corps Air Station El Toro near Irvine at the end of a flight from Naval Air Station Fallon in Nevada. The two aircraft collided in midair over the San Gabriel Mountains near Duarte, killing all 49 aboard the DC-9 and the F-4 pilot; the F-4 radar intercept officer ejected and survived.
Progress Multi Trade Air Flight 241 was a scheduled domestic passenger flight from Siem Reap to Sihanoukville, Cambodia. The flight was operated by regional airliner PMTair using an Antonov An-24. On 25 June 2007, the Antonov An-24, registered as XU-U4A, disappeared over the Cambodian jungle near Bokor Mountain in Kampot while on approach to Sihanoukville. A massive search and rescue operation ensued with thousands of soldiers and police scoured the area. The aircraft was found to have crashed in southwestern Cambodia, northeast of Dâmrei Mountains. All 22 people on board, most of whom were South Korean tourists, were killed. It remains as the second deadliest air disaster in Cambodian history.
Indian Airlines Flight 257 was an Indian Airlines domestic passenger flight operating on the Calcutta–Imphal–Dimapur route. On 16 August 1991, the Boeing 737-2A8 registered VT-EFL crashed into the hilly terrain of Thangjing Hill during its descent, killing all 63 passengers and 6 crew members on board.
West Coast Airlines Flight 956 was a scheduled commercial flight in the western United States which crashed on October 1, 1966, approximately 5.5 miles (9 km) south of Wemme, Oregon, southeast of Portland. Thirteen passengers and five crew members were aboard, but none survived. In its first week of service, the aircraft was destroyed by the impact and subsequent fire.
Aviateca Flight 901 was a scheduled international passenger flight which crashed into the 7,159-foot (2,182 m) San Vicente volcano in El Salvador on approach to the Comalapa International Airport on 9 August 1995. The accident killed all 65 passengers and crew on board and is the deadliest aviation disaster to occur in El Salvador. An investigation by the Civil Aviation Authority determined that pilot error and air traffic control error in bad weather contributed to the accident.
Allegheny Airlines Flight 485 was a regularly scheduled domestic passenger flight between Washington, D.C. and Newport News, Virginia, United States, with three stop-overs, two in Connecticut and a third in Pennsylvania. On June 7, 1971, the Allegheny Airlines Convair CV-580 operating the flight crashed on approach to Tweed New Haven Regional Airport, New Haven County, Connecticut.
On June 29, 1972, North Central Airlines Flight 290 collided in mid-air with Air Wisconsin Flight 671 over Lake Winnebago near Appleton, Wisconsin, in the United States. Both aircraft crashed into the lake, killing all 13 people on board both aircraft.
Continental Charters Flight 44-2, a domestic non scheduled passenger flight from Miami, Florida to Buffalo, New York, crashed on December 29, 1951 near Napoli, New York. The twin engine C-46 Commando, registration N3944C, crashed approximately 10:25 pm in adverse weather conditions. Of the four crew and 36 passengers on board, three crew members and 23 passengers perished. The flight crew's poor judgment in attempting a flight by visual reference during instrument weather conditions was the cause of the accident.
Allegheny Airlines Flight 736 was a regularly scheduled flight that crashed while attempting to land at Bradford Regional Airport in Bradford, Pennsylvania, on December 24, 1968. Of the 47 occupants on board, 20 were killed.
Si Fly Flight 3275 (KSV3275) was a non-scheduled international passenger flight from the Italian capital of Rome to Pristina, Kosovo. The flight was operated by Italian airliner Si Fly using an ATR 42-300 series. On 12 November 1999, the aircraft struck a mountain during the approach to Pristina, killing everyone on board. With 24 deaths, the accident remains as the deadliest aviation disaster in Kosovo's history.
Air Bagan Flight 011 was a scheduled domestic passenger flight of a Fokker 100 twinjet from Yangon to Heho, Myanmar. On 25 December 2012, the aircraft crash-landed short of the runway at Heho Airport in fog, coming to a stop in a paddy field and bursting into flames. One of the 71 people on board and a motorcyclist on the ground were killed and more than 10 people were injured.
Merpati Nusantara Airlines Flight 5601 (MNA5601/MZ5601) was a domestic scheduled passenger flight, that departed Achmad Yani International Airport, Semarang, Indonesia bound for Husein Sastranegara International Airport, Bandung, Indonesia. On 18 October 1992, the two-year-old CASA/IPTN CN-235-10 was on approach to Bandung when it crashed into the side of Mount Puntang, near Mount Papandayan, West Java, Indonesia at 1:30 pm in bad weather. The aircraft exploded on impact killing all twenty seven passengers and four crew on board.
Alaska Central Express Flight 51 was an Alaska Central Express flight from Anchorage to King Salmon and Dillingham, Alaska. On 8 March 2013, the Beechcraft 1900C-1 serving the flight crashed into a mountain on approach to Dillingham Airport, killing both crew members on board.
Tara Air Flight 197 was a scheduled domestic flight operated by Tara Air for parent company Yeti Airlines from Pokhara Airport to Jomsom Airport in Nepal. On 29 May 2022, the Twin Otter aircraft carrying 22 people departed at 09:55 NPT and lost contact with air traffic controllers about 12 minutes later at 10:07 (04:22). The wreckage was located 20 hours later on a mountainside. All 22 passengers and crew were killed, and all 22 bodies were recovered. This was Tara Air's second deadly accident on this route, after Flight 193 in 2016.
Sierra Pacific Airlines Flight 802 was a charter flight from Bishop, California to Burbank, California that crashed into the White Mountains on the evening of March 13, 1974. The aircraft, carrying a movie production crew, crashed for undetermined reasons, killing all 36 occupants on board. To this day, the crash remains one of only three aviation accidents to be unsolved by the National Transportation Safety Board (NTSB), and it stands as the fourth-deadliest crash of a Convair CV-440 to date.
