What was found
NR 2 ENGINE FAILED CLIIMBING THROUGH 31,000, AIRCRAFT RETURN TO DAL MADE AN UNEVENTFUL LANDING. INSPECTED AND FOUND ACCY GEARBOX FAILURE WITH DAMAGE TO RT T/B COWLING AND R/T INBD LANDING LIGHT LENS COVER. REMOVED AND REPLACED NR 2 ENGINE AND R/T I/B LANDING LIGHT LENS PER BOEING MM.