The "Comité de Investigación de Accidentes Aéreos" (CIAA, Aircraft Accidents Research Committee) of Venezuela led the investigation into the causes of the accident. The French "Bureau d'Enquêtes et d'Analyses pour la Sécurité de l'Aviation Civile" was assigned the main responsibility for investigative analysis of the flight data recorder and the cockpit voice recorder (CVR), with the United States National Transportation Safety Board (NTSB) also taking part in recovery of FDR data. On 22 November 2005, the CIAA released an initial report (significantly changed by the time of the final report) suggesting that a buildup of ice inside each engine's PT2 probe was partly responsible for the accident. Analysis of the CVR showed that the crew discussed weather conditions, including icing, and continually requested and performed descents, which is the usual response to a low power or low airspeed situation.