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According to the investigation, the plane disintegrated en route after the rupture of one its wings following excessive loads in a zone of turbulence. Both the pilot and the company's flight dispatcher contributed to the disaster by misevaluating the weather forecast and choosing an inappropriate flight altitude.[2] All 67 occupants of the aircraft – 7 crew and 60 passengers – were killed in the accident,[4] which remains the deadliest one the company experienced all through its history.[5]
As of 2024, Flight 644 remains the deadliest aviation disaster in Argentine history.[6]