As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN REPORTED THAT LT AIRSPEED INDICATOR SHOWED MACH 0.50, SO AIRSPEED INDICATOR WAS REPLACED IAW MM 34-13-01, TESTED CORRECT. AIRCRAFT WAS DISPATCHED BUT REJECTED TAKEOFF AT 80 KNOTS DUE TO LT AIRSPEED INDICATOR FAILED. CADC NR 1 AND 2 WERE TESTED IAW MM 34-16-00 BUT CADC NR 1 AIRSPEED INDICATION WAS ZERO. LT AIRSPEED INDICATOR WAS REPLACED AGAIN IAW MM 34-13-01, TESTED CORRECT.