What was found
DURING FLIGHT AT FL 190 LT AIRSPEED INDICATOR WENT OVER 250 KNOTS AND RUDDER LIMIT INDICATOR ON, OAT -10 DEGREES RT AIRSPEED INDICATOR WAS READING 140 AND STBY 160, THEN THE LT AIRSPEED WENT 0 BELOW 8,000 FT ALL INDICATOR WERE READING NORMAL. INSPECTED LT STBY, RIGHT PITOT TUBES AND WATER TRAPS. DRAIN WATER FROM TRAPS ALL CHECKED GOOD, ALSO CHECKED ADC PITOT/STATIC CONNECTION ALL CHECKS GOOD.