What was found
NOSE GEAR DISAGREE AND NOSE DOOR OPEN WARNING MESSAGE ON APPROACH. RAN QRH. REQUIRED MANUAL GEAR EXTENSION. WARNING MESSAGES EXTINGUISHED FOLLOWED BY A PRECAUTIONARY LANDING (FLIGHT 5247 - FILED CLOSED) REMOVED AND REPLACED NLG SELECTOR VOVLE PER CRJ200 AMM 32-33-10, PERFORMED FUNCTIONAL TEST OF THE EXTENSION AND RETRACTION SYSTEM (REF.TASK 32-30-00-720-801), FUNCTION CHECK GOOD, NO LEAK NOTED, NO MESSAGES NOTED