What was found
DEN - FLT 2072 - FLIGHT INBOUND, WAS UNABLE TO OBTAIN A NLG DOWN AND LOCK LIGHT. GP EXPRESS MAINTENANCE CLEANED AND ADJUSTED THE DOWNLOCK SWITCH AND CYCLED THE GEAR SEVERAL TIMES WITH NO DISCREPANCIES NOTED. AIRCRAFT WAS RETURNED TO SERVICE. LATER THAT DAY, FLIGHT 2074 REPORTED THE SAME MALFUNCTION. GP EXPRESS MAINTENANCE REPLACED THE DOWNLOCK SWITCH AND CYCLES THE GEAR WITH NO DISCREPANCIES NOTED. AIRCRAFT WAS RETURNED TO SERVICE. ON 1-3-95, SAME DISCREPANCY OCCURRED INBOUND TO DEN ON FLIGHT 2078. GP EXPRESS MAINTENANCE REPLACED NLG ACTUATOR. SYSTEM GROUND CHECKED SATISFACTORY AND A/C RETURNED TO SERVICE.