As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ON APPROACH ON PROPER APPROACH SPEED RECEIVED INTERMITTENT AIRSPEED LOW ALERT. ACCOMPLISHED FLAP SLAT ELECTRONIC UNIT BUILT IN TEST EQUIPMENT PER AMM 27-51-00 FAULT MESSAGE 27-81201. REMOVED AND REPLACED SLAT 1 PROXIMITY INBOARD SENSOR PER AMM 27-88-11.