What was found
GEAR DISAGREE ON FINAL IN DTW. GEAR WOULDN€™T COME DOWN AFTER BEING SELECTED DOWN. CYCLING GEAR DIDN€™T RESOLVE THE ISSUE. MANUAL RELEASE PULLED AND GEAR WENT DOWN AND LOCKED, REMAINDER OF FLIGHT UNEVENTFUL. (FLIGHT 3625 - FILED CLOSED) THIS DISCREPANCY WAS TRANSFERRED TO CAMP ITEM 29331402 WITH THE FOLLOWING CORRECTIVE ACTION: "TROUBLESHOT PER CRJ900 FIM 32-31-00. OPERATED LANDING GEAR SYSTEM EXTENSION AND RETRACT NUMEROUS TIMES WITHOUT ISSUE PER CRJ900 AMM 32-30-00. SUSPECT LANDING GEAR SELECTOR VALVE. REMOVED AND REPLACED LANDING GEAR SELECTOR VALVE IN ACCORDANCE WITH CRJ900 AMM 32-32-10. OPERATION CHECK OF SELECTOR VALVE IS GOOD. NO LEAKS NOTED. OPERATED LANDING GEAR EXTENTION AND RETRACTION NUMEROUS TIMES WITHOUT ISSUE PER CRJ900 AMM 32-30-00. "