What was found
DESCENDING THROUGH FL245, AUTOPILOT DISENGAGED. A/C REMAINED LNAV/VNAV PATH AND I WAS ABLE TO RE-ENGAGE SUCCESSFULLY. GROUNDED - YES. BITE CHK DFCS, NO CURRENT FAULTS, OPS NORMAL, IAW FIM 22-11 TSK 801. PERFORMED B737-800 FIM 22-11 TASK 801 CURRENT STATUS TESTS FOR AUTOPILOT GRP 11. TESTS OK. PERFORMED LWMP TESTS IAW AMM 22-00-01 AND 22-11-31 DFCS LRU INTERFACE TEST FOR FCC, TESTS OK. PERFORMED LAND VERIFY IAW AMM 22-11-00/201 AND HGS SENSOR TEST FOR FCC. ALL TESTS OK. HGS SYS TEST OK. ACFT UPGRADED TO CAT III A AUTOLAND AND HGS QUAL.