What was found
WHEN PLACING GEAR DOWN, WE HAD 3 GREEN, BUT SECONDS AFTER, THE LIGHTS WENT OUT. WE ALSO SMELLED BURNING AND F/O SAW SMOKE COMING FROM GEAR HANDLE, WHEN TAXING TO PARK, ACFT WAS UNABLE TO STEER, LANDING GEAR INDICATOR CIRCUIT BREAKER TRIPPED. INSPECTED ALL WIRING IN COCKPIT AND AT LANDING GEAR CONTROL VALVE NO DEFECTS FOUND, INSTALLED SERVICEABLE LANDING GEAR HANDLE AND REPLACED NOSE STEERING ACTUATOR ASSY, PN 70857-2, SN 0211G. OPS CHECKS NORMAL.