What was found
AT 100KTS, CAPT RECEIVED AN "ALT" ALERT IN PFD AT ROTATION F/O LOST ALL AIRSPEED, ALT INDICATIONS. APPROX 1 MIN LATER RECIEVED 3X FADEC ALTN, SEL ELEV FEEL MANUAL AND RED SLOW SPEED ZIPPER IN FO PFD. QRH PROCEDURES ACCOMP, CADC-1 WAS GOOD. ISOLATED CADC-2 OFF. PER CREW DEBRIEF ALL CAPT, F/O IND NORMAL WITH F/O CADC SISP S/W TO F/O ON 1. T/S PER FIM 34-16-00. DURING CADC-2 ADJ/TEST PER MM. GOT INTERMITTENT ADC FAIL YELLOW FAULT BALL. R/R`D CADC-2 PER MM AND PERFORMED OP`S TEST/INTERFACE TEST AND CAT3B RTS TEST MM. ALL TESTS NORMAL. PERFORMED SAME ON CADC-1 AND FOUND NORMAL. INSPECTED PITOT TUBES/STATIC PORTS FOR OBSTRUCTIONS AND NONE FOUND. A/C OK FOR SERVICE AND REMAINS CAT3B.