What was found
MLG: PUT GEAR HANDLE DOWN RECEIVED RIGHT GEAR, DISAGREE, CASS MESSAGE, YELLOW, X OVER RIGHT GEAR. FOLLOW QRH. YELLOW X DID NOT DISAPPEAR. BLEW DOWN GEAR AND MADE LANDING. PUT IN FULL FLAPS, RECEIVED AURAL WARNING, GEAR. AND RED X REPLACED THE YELLOW X ON THE MLG. REMOVED INOP UPLOCK SWITCH P/N 6948101-3 NSN AND INSTALLED CUSTOMERSUPPLIED NEW UPLOCK SWITCH. P/N 6948101-3 NSN. ADJUSTED SWITCH TOCORRECT POSITION. OP'S CHECK GOOD NO DEFECTS NOTED.