20 May 2009 : A Lockheed C-130 Hercules of the Indonesian Air Force crashes at Magetan killing 97 people on board the aircraft and a further two on the ground.
20 May 2009 : The 2009 Indonesia C-130H Hercules crash was an aircraft accident in Indonesia on May 20, 2009. The Indonesian Air Force Lockheed C-130 Hercules airplane was carrying 112 people (98 passengers and 14 crew) and crashed at about 6:30 local time (23:30 UTC), while flying from Jakarta to eastern Java. The crash resulted in at least 98 deaths, 5 of which occurred on impact when the plane ploughed through a neighborhood, striking at least four houses before skidding into a paddy, in the village of Geplak. Two people on the ground were killed. At least 70 others had been taken to a local hospital. Authorities believe that there is still 1 missing body.
20 May 2003 : First flight of the SpaceShipOne (first captive flight, unmanned)
20 May 1982 : A Dassault Mirage III of the Brazillian Air Force crashed, two crew killed.
20 May 1978 : McDonnell Douglas delivers its 5,000th F-4 Phantom II aircraft, twenty years after the first flight of the prototype.
20 May 1977 : Introduction: Embraer EMB 121 Xingu
20 May 1977 : First flight of the Sukhoi T-10 (prototype of Sukhoi Su-27)
20 May 1973 : First flight of the PZL M-15 Belphegor
20 May 1971 : Boeing announces that it has canceled its Supersonic Transport (SST) project.
20 May 1967 : American aircraft strike military targets in downtown Hanoi.
20 May 1965 : First flight of the De Havilland Canada DHC-6 Twin Otter
20 May 1965 : Pakistan International Airlines Flight 705, a Boeing 720-040 B on an inaugural flight carrying mostly journalists and owners of travel agencies and crewed by what the airline considered its best crew members, crashes short of the runway while descending to land at Cairo International Airport in Cairo, Egypt, killing 119 of the 125 people on board and injuring all six survivors.
20 May 1965 : DHC-6 Twin Otter prototype was test flown at Downsview by R. H. Fowler.
20 May 1959 : First flight of the Aerospatiale N 262 (MH.250)
20 May 1959 : A USAF Lockheed C-130A Hercules 57-0468, c/n 3175 overshot the runway at Ashiya AB, Japan . The pilot tried to pull up, but the C-130 crashed into Air Force barracks. 9 fatalities.