Concorde Affaire '79 (1979) on Netflix

Plot summary

Two fishermen find the lone survivor of L.P.A. Flight 820, a Concorde test flight that has gone down in the sea off the coast of Martinique, and agents in a speedboat kill them for what they saw. In New York, reporter Moses Brody takes a call from his ex-wife Nicole, who says she has an important story for him, and he travels to Martinique, where he learns she is dead, officially of a heart attack. Thugs corner him that night until a local trawler owner named Georges, a friend of Nicole, steps in and tells him about the wreck on a reef nearby. Businessman Milland and his partner Danker move to cover up all evidence of the crash.