As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COMMAND B LIGHT ON MCP IS INOPERATIVE. ACFT GROUNDED. REMOVED AND REPLACED MODE CONTROL PANEL IAW AMM 22-11-34-000-801 AND 22-11-34-400-801. ACCOMPLISHED GROUP 32 DFCS LRU INTERFACE TEST FOR MCP AND GROUP 49 LAND VERIFY TEST IAW AMM 22-11-00. PERFORMED HGS SENSOR TEST FOR FCC/AT IAW SMM 34-36-00. ACCOMPLISHED DFCS MODE CONTROL PANEL INSTALLATION TEST IAW AMM 22-11-35-740-801. ALL TESTS PASSED. AIRCRAFT REMAINS CAT III A AUTOLAND AND HGS OPS.