As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FROM CLE ON FLIGHT 4166 THE NLG WOULD NOT RETRACT ALONG WITH A GEAR DISAGREE WARNING. CREW CYCLED THE GEAR, NO HELP. THE AIRCRAFT THEN DIVERTED TO DTW AND SWAPPED TO ANOTHER AIRCRAFT. REMOVED AND REPLACED NLG SELECTOR VALVE IAW CRJ200AMM 33-22-20. OPS CHECK GOOD AT THIS TIME. C/W PA 05-018 SER NR 1.