What was found
DURING APPROACH, AFTER SELECTION TO EXTEND LANDING GEAR, NO INDICATION LIGHTS ILLUMINATED. NO "AMBER" DOORS OPEN, NO "RED" GEAR TRANSITION AND NO "GREEN" DOWN AND LOCKED. THE GEAR WAS DOWN. CAPTAIN SELECTED GEAR UP, ABORTED APPROACH FOR A GO-AROUND, GEAR WAS RETRACTED, NO INDICATIONS. DECLARED AN EMERGENCY, STARTED 2ND APPROACH AND LANDED SAFELY. GROUND MX R & R LANDING GEAR SELECTOR PANEL. A FUNCTIONAL CHECK WAS PERFORMED SATISFACTORY. ACFT RELEASED FOR AN OPS CHECK FLIGHT. CHECK FLIGHT WAS SATISFACTORY. ACFT WAS RELEASED TO FLIGHT STATUS.