As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRST OFFICER COURSE SELECT WINDOW SHOWS "UAU". GROUNDED - YES. CURRENT STATUS ALSO SHOWED MCP FAULTS.CYCLED POWER & RESTORED OPERATION.REMOVED & REPLACED MCP DUE TO REPEAT FAILURE.OP CK NORMAL.REF MM 22-11-34/401.NINE TAGS INSTALLED & REMOVED.