NEW : Work ` ` well under way , '' Northwest parent company , says . FAA orders all airlines to replace devices under suspicion in Air France aircraft . The devices could be giving false airspeed indications . There are 302 of the aircraft worldwide . Northwest and US Airways are only U.S. carriers that fly these planes .
NEW : Work ` ` well under way , '' Northwest parent company , says . FAA orders all airlines to replace devices under suspicion in Air France aircraft . The devices could be giving false airspeed indications . Northwest and US Airways are only U.S. carriers that fly these planes .