As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FINAL APPROACH GEAR DISAGREE WARNING MESSAGE DISPLAYED. FOLLOWED QRH PROCEDURE AND USED GEAR MANUAL RELEASE AND RECEIVED THREE GREEN INDICATIONS FOR THE LANDING GEAR. REMOVED AND REPLACED LANDING GEAR LEVER IAW CRJ 900 AMM 32-31-01. PERFORMED OPS CHECK AND GEAR SWING IAW CRJ 900 AMM 32-30-00. ALL CHECKS GOOD NO MSG NOTED OK FOR SVC.