What was found
(CAN) LANDING GEAR LEVER DISAG, RED CAS MESSAGE ILLUMINATED ON TAKEOFF EG AFTER GEAR SELECTED UP. THE 3 GEAR STATUS INDCATIONS INDICATED THE GEAR WAS DOWN BUT TURN RED. THE QRH CHECKLIST WAS COMPLETED BY THE CREW AND THE CONDITION WAS NOT RECTIFIED. GEAR WAS SELECTED DOWN. THE MEASSGE CLEARED AND THE GEAR INDCATION, INDICATED NORMAL. FLIGHT DIVERTED WITH AN UNEVENTFUL LANDING. ENGINEERING STAFF JACKED THE ACFT AND WERE ABLE TO DUPLUCATE THE FAULT WHEN A GEAR RETRACTION WAS ATTEMPTED, AFTER SOME TROUBLESHOOTING, THE LANDING GEAR CONTROL LEVER WAS REPLACED AND SYSTEMS OPS TESTED OK.