As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALTITUDE CONTROL WINDOW CHANGED FROM 34,000 TO 50,000. ALTITUDE HORN GOING OFF THE WHOLE RETURN. AFTER LANDING ALL RETURNED TO NORMAL OPERATION. DURING RETURN LEVEL CHANGE INOPERATIVE. ACFT GROUNDED. DFCS FLT HISTORY BITE LOGGED, MCP FAULT. REPLACED MCP IAW AMM 22-11-34-400-801. ACCOMPLISHED LLM TEST FOR MCP. DFCS LRU REPLACEMENT TEST FOR MCP AND LAND VERIFY TEST. ALL TESTED NORMAL. ACFT REMAINS CAT IIIA AUTOLAN, HGS QUALIFIED.