What was found
(CAN) CREW CALLED FOR GEAR DOWN. BOTH MAIN GEAR INDICATED DOWN AND LOCKED, AND DOORS CLOSED. THE NOSE GEAR RED UNSAFE LIGHT AND AMBER SELECTOR HANDLE WERE ILLUMINATED. THE ALTERNATE DOWN LOCK VERIFICATION SYS CONFIRMED THIS. TOWER WAS INFORMED THAT A GO-AROUND WOULD BE INITIATED AND THAT THE NOSE GEAR WAS NOT DOWN AND LOCKED. THE ALTERNATE GEAR EXTENSION CHECKLIST WAS REVIEWED. EMERGENCY WAS NOT DECLARED. LANDED WITHOUT INCIDENT. MLG PINNED AND ACFT RETURNED HOME. GEAR SWINGS CARRIED OUT WITH NO FAULTS FOUND. SOLONOID SEQUENCE VALVE REPLACED AS A PRECAUTION. TESTED SERVICEABLE.