Two officials investigators in an Air France jet crash are looking at whether speed data instruments malfunctioned.
The officials, who have knowledge of the investigation, said an iced-over external probe or a bad speed sensor may have fed inaccurate data to onboard computers controlling the jet.
The officials spoke Thursday on condition of anonymity because they weren't authorized to discuss the case.
Aviation analyst Bill Voss said if the plane was traveling too fast in heavy turbulence, it could break apart. If traveling too slow, it could stall.
The Airbus A330 crashed into the Atlantic Ocean on a flight from Rio de Janeiro to Paris Sunday night with 228 people on board.