As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MODE CONTROL PANEL ALTITUDE SEEMS TO BE STUCK AT 50,000 IN ADDITION THE IAS SPEED NOW DOES NOT CONTROL THE MCP COMMANDED SPEED. ACFT GROUNDED. REMOVED AND REPLACED DFCS MODE CONTROL PANEL, IAW AMM 22-11-34. MODE CONTROL PANEL INSTALLATION TEST GOOD. RE-RACK FCC CH. B IN IAW AMM 22-11-00-740-806. BITE TEST GOOD.