What was found
34L CAT2 AUTOLAND / HGS REQUESTED: AT 100' AGL AIRCRAFT DRIFTED LEFT AND BEGAN EXCESSIVE DESCENT. HGS WARN ILLUMINATED AT SAME TIME. DISCONNECTED AUTOPILOT AND LANDED MANUALLY. ACFT ON SPEED, LOCALIZER AND GLIDESLOPE UNTIL 100 AGL. CRITICAL AREA CLEAR. GROUNDED - YES. PERFORMED DFCS BITE PROCEDURE PER FIM 22-11 TASK 801. NO CURRENT FAULTS FOUND. NO FAULT HISTORY FOUND. PERFORMED GOOD BITE LIBRARY TEST PER AMM 22-11-00-740-806. ALL TESTS PASSED.