What was found
DURING APPROACH, AT AROUND 17000FT, IAS INDICATORS DISAGREED. FOLLOWED BY LEVEL 2 SEL ELEV FEEL MAN, SEL FLAP LIM OVRD. EMERGENCY DELCARED. AIRSPEED UNRELIABLE CHECK ACCOMPLISHED. TROUBLESHOT IAW FIM 34-11-02, AND NO FAULT FOUND AND BOTH CADC. TESTED OK IAW MM 34-16-01-501 AND PITOT STATIC TEST IAW MM 34-11-00-201, TESTED OK. PERFORMED FCC AFS RETURN TO SERVICE IAW MM 22-01-10-501, PASSED. OK FOR SERVICE.