As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS INDICATED SPEED ON PFD OFF BY 5-6 KNOT AT 80 KNOT AND V SPEED CALLOUTS. ONCE AIRBORNE INDICATED AIRSPEED THE SAME ON BOTH AIRSPEED INDICATORS BELOW 1000 ON APPROACH DIFFERED BY 5 KNOTS. MAINTENANCE REMOVED AND REPLACED AIR DATA MODULE 19FP1 AND 19FP2 IAW AMM 34-11-17. TESTED IAW AMM 34-13-00-720-009-B, TEST OK. NO SPLIT NOTED. (SEE SDR # AALA201906049004)