As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB, MCP ALTITUDE SELECTOR WENT TO 50000 AND WOULD NOT MOVE. UPDATED MAA CODE FIX USING VENDOR MAA SCREEN. PLEASE REPLACE MODE CONTROL PANEL IAW AMM 22-11-34-400-801. TEST IAW AMM 22-11-34-740-801. REPLACED MODE CONTROL PANEL IAW AMM 22-11-34-400-801. TEST IAW AMM 22-11-34-740-801.