As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN SELECTING LG LEVER TO DOWN POSITION GEAR DISAGREE WARNING MESSAGE POSTED RAN THE CHECKLIST AND MANUALLY LOWERED GEAR AND GOT THREE GREEN WHEN CYCLING LG LEVER PROX SYS FAULT 1 STATUS MESSAGES POSTED BRIEFLY STEER INOP UPON LANDING. REMOVED AND REPLACED LANDING GEAR SELECTOR VALVE IAW AMM 32-32-10 COMPLETED INSTALLATION UP TO STEP 5E. NOSE WHEEL STEERING OPS CHECK GOOD IAW AMM 32-51-00. PERFORMED OPS CHECK LDG GEAR EXT/RETRACTION SYSTEM IAW CRJ AMM 32-30-00 NO DEFECTS NOTED