What was found
ON T/O AIRSPEED WENT BLANK. F/O SIDE APPEARED NORMAL. THIS WAS ACCOMPANIED BY SEL FLAP LIM OVRD AND SEL ELEV FEEL MAN. NUMEROUS OTHER LIGHTS WERE ILLUMINATED. ACCOMPLISHED CHECKLIST. CAPT'S PITOT PROBE CLOGGED WITH DEBRIS. REMOVED AND REPLACED CAPTS PITOT TUBE DUE TO OBSTRUCTION. REF MM 34-11-01. LEAK CKS GOOD. PITOT/STATIC SYSTEM CKD BOTH CAPTS AND FO'S USING RESPECTIVE CADC SYS. NO LESS OR SPLIT OF AIRSPEED NOTED.