As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RUDDER TRAVEL UNRESTRICTED LIGHT REMAINED ON AFTER TAKEOFF. FLIGHT DIVERTED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND PITOT LINE TO RUDDER LIMITER PROBE BLOCKED WITH ICE. DRAINED WATER FROM TRAP. REPLACED RUDDER TRAVEL UNRESTRICTED LIGHT SWITCH, OPERATIONAL CHECK NORMAL.