What was found
AIRSPEED, LOST SUSPECT OR ERRATIC IAS ANNUNCIATION ON BOTH PFD, W SHEAR DET FAIL ALERT SEL ELEV FEEL MAN. SEL FLAP LIM OVER RIDE IND A/S NOT CONSISTENT WITH NORMAL PITCH ATT & PWR. REF WRI 34-16-9308 FOR CADC REMOVE AND REPLACE. INSPECTED ALL 3 PITOT TUBES IAW AMM 34-11-01-6. CAPT/STBY GOOD. F/O'S DRAIN HOLES WERE CLOGGED. CLEANED DRAIN HOLES IAW AMM 34-11-01-2. CHECKS GOOD IAW AMM 34-11-00-2. CHECKED ADC'S IAW AMM 34-16-03-2. CHECKS GOOD WITH NO FAULTS. OTHER WARNINGS WHERE SET OFF BY F/O'S ERRATIC AIR SPEEDS. ACFT OK FOR SERVICE.