What was found
DURING APPROACH SELECTED GEAR DOWN RECEIVED A GEAR DISAGREE L CAS MESSAGE AND AN X ON THE LEFT MAIN GEAR WINDOW (SEE PICTURE). COMPLETED QRH 19B AND QRH 11A. LANDING WAS UNEVENTFUL, STOOPED THE AC ON THE RUNWAY, SHUT IT DOWN AND HAD IT TOWED TO THE FBO RAMP. REMOVED INTERMITTENT LEFT MAIN LANDING GEAR UPLOCK SWITCH, AND INSTALLED A NEW SWITCH IAW MM 32-30-05. OPS CHKD GOOD.