What was found
ON TAKEOFF, ALL AIRSPEED INDICATIONS LOST, RECEIVED SELECT FADEC OFF; AIRSPEED INDICATIONS CAME BACK BUT ERRONEOUS; LOST ALTITUDE INDICATION, LSAS ALL FAIL ALERT; YAW DAMP ALL FAIL. INFO NOTE: PER CREW DEBRIEF INDICATION LOSS ONLY ON CAPTAINS SIDE. FAULT REVIEW OF NR 1 ,NR 2 IRU NR 1 FCC ALL THREE COMPUTER REPORT NR 1 CADC FAIL AND NR 1 CADC FAULT BALL INDICATING YELLOW REF MM 34.16.01.04, MM 34.16.01.05. REPLACED NR 1 CADC PURGE NR 1 CADC PITOT STATIC LINES AND PERFORM LOW LEVEL LEAK CK AND NR 1 CADC CAT 3 RETURN TO SERVICE TEST OK, A/C REMAIN IN CAT 3B AND RVSM STATUS.