The 1973 Paris Air Show Tu-144 crash of Sunday 3 June 1973 destroyed the second production model of the Russian supersonic Tupolev Tu-144. The aircraft disintegrated in the air while performing extreme manoeuvres and fell on the town of Goussainville, Val-d'Oise, France, killing all six crew members and eight people on the ground. The crash ended the development program of the Tupolev Tu-144. The official inquest did not conclusively determine the cause of the accident and several theories have been proposed.