Most Dangerous Aircraft Accident

Japan Airlines Flight 123

Japan Airlines Flight 123 was a scheduled domestic Japan Airlines passenger flight from Tokyo's Haneda Airport to Osaka International Airport, Japan. On August 12, 1985, a Boeing 747SR operating this route suffered a sudden decompression twelve minutes into the flight and crashed in the area of Mount Takamagahara, Ueno, Gunma Prefecture, 100 kilometres from Tokyo thirty-two minutes later. The crash site was on Osutaka Ridge.

Japan's Aircraft Accident Investigation Commission officially concluded that the rapid decompression was caused by a faulty repair by Boeing technicians after a tailstrike incident during a landing at Osaka Airport in 1978. The rear bulkhead of the plane had been repaired with an improperly installed doubler plate, compromising the plane's airworthiness. Cabin pressurization continued to expand and contract the improperly repaired bulkhead until the day of the accident, when the faulty repair failed, causing a rapid decompression that ripped off a large portion of the tail and caused the loss of hydraulic controls to the entire plane.

The aircraft, configured with increased economy class seating, was carrying 524 people. Casualties of the crash included all 15 crew members and 505 of the 509 passengers. Some of the passengers survived the initial crash but died of their injuries hours later while awaiting rescue. It is the deadliest single-aircraft accident in aviation history.

Iran Air Flight 655

Iran Air Flight 655 was a scheduled passenger flight from Tehran to Dubai via Bandar Abbas that was shot down on 3 July 1988 by an SM-2MR surface-to-air missile fired from USS Vincennes, a guided-missile cruiser of the United States Navy. The aircraft, an Airbus A300, was destroyed and all 290 people on board were killed. The jet was hit while flying over Iran's territorial waters in the Persian Gulf, along the flight's usual route, shortly after departing Bandar Abbas International Airport, the flight's stopover location. The incident occurred during the final stages of the Iran–Iraq War, which had been continuing for nearly eight years. Vincennes had entered Iranian territory after one of its helicopters drew warning fire from Iranian speedboats operating within Iranian territorial limits.

Turkish Airlines Flight 981

Turkish Airlines Flight 981 was a scheduled flight from Istanbul Yesilköy Airport to London Heathrow Airport, with an intermediate stop at Orly Airport in Paris. On 3 March 1974, the McDonnell Douglas DC-10 operating the flight crashed into the Ermenonville Forest, outside Paris, killing all 346 people on board. The crash was also known as the Ermenonville air disaster. At the time, Flight 981 was the deadliest plane crash in aviation history until 27 March 1977, when 583 people perished in the collision of two Boeing 747s in Tenerife. It remained the deadliest single-aircraft accident until the crash of Japan Airlines Flight 123 on 12 August 1985, and the deadliest aviation accident without survivors until the Charkhi Dadri mid-air collision on 12 November 1996. It remains the deadliest single-aircraft accident without survivors, the first fatal and deadliest crash involving the McDonnell Douglas DC-10, and the deadliest aviation accident to occur in France. It is also the deadliest aviation accident that does not involve a Boeing 747.

Malaysia Airlines Flight 370

Malaysia Airlines Flight 370 was a scheduled international passenger flight operated by Malaysia Airlines that disappeared on 8 March 2014 while flying from Kuala Lumpur International Airport to its planned destination, Beijing Capital International Airport. The crew of the Boeing 777-200ER aircraft last communicated with air traffic control (ATC) around 38 minutes after takeoff when the flight was over the South China Sea. The aircraft was lost from ATC radar screens minutes later but was tracked by military radar for another hour, deviating westwards from its planned flight path, crossing the Malay

 Peninsula and Andaman Sea. It left radar range 200 nautical miles (370 km) northwest of Penang Island in northwestern Peninsular Malaysia. With all 227 passengers and 12 crew aboard presumed dead, the disappearance of Flight 370 was the deadliest incident involving a Boeing 777 and the deadliest in Malaysia Airlines' history until it was surpassed in both regards by Malaysia Airlines Flight 17, which was shot down while flying over conflict-stricken eastern Ukraine four months later. The combined loss caused significant financial problems for Malaysia Airlines, which was renationalised by the Malaysian government in December 2014.

Air India Flight 182

Air India Flight 182 was an Air India flight operating on the Montreal–London–Delhi route. On 23 June 1985 it was operated using Boeing 747-237B registered VT-EFO. It disintegrated in midair en route from Montreal to London, at an altitude of 31,000 feet (9,400 m) over the Atlantic Ocean, as a result of the explosion from a bomb planted by Canadian Sikh extremists known commonly as Khalistanis, who were involved in the Khalistan movement. The remnants of the airliner fell into the ocean

 approximately 120 miles (190 km) west-southwest of the southwest tip of Ireland, killing all aboard: 329 people, including 268 Canadian citizens, 27 British citizens and 24 Indian citizens. The bombing of Air India Flight 182 is the largest mass killing in Canadian history, the deadliest aviation incident in the history of Air India and was the deadliest act of aviation terrorism until the September 11 attacks in 2001.The Babbar Khalsa terror group was implicated in the bombings.