What was found
AFTER SELECTING THE LANDING GEAR LEVER TO THE DOWN POSITION. WE RECEIVED 2 MAIN GEAR INDICATORS IN THE DOWN AND LOCKED POSITION (GREEN) AND THE NOSE INDICATOR WAS A RED HATCHED BOX. WENT AROUND, PER THE QRH WE CYCLED THE GEAR, RECEIVED 3 GREEN INDICATORS AND DIVERTED TO IAD. LANDED WITHOUT INCIDENT. REMOVED AND REPLACED NOSE LANDING GEAR UPLOCK BOX IAW EMB-505 AMM 32-31-05. BLEED UPLOCK ACTUATOR IAW EMB-505 AMM 32-31-05-870-801. PERFORMED OPERATIONAL CHECK OF EMERGENCY EXTENSION SYSTEM IAW EMB-505 AMM 32-35-00-710-801. PERFORMED FUNCTIONAL CHECK OF EXTENSIONAL AND RETRACTION SYSTEM IAW EMB-505 AMM 32-31-00-720-801. OPS CHECK SAT.