What was found
MHT - ON APPROACH TOT MHT PILOT SELECTED GEAR DOWN. NO MOVEMENT NOTED. CHECKED GEAR CIRCUIT BREAKER AND NOTICED IS WAS OUT. PILOT PUSHED BREAKER IN AND IT WOULD NOT STAY IN. PILOT PUSHED BREAKER IN WITH GEAR HANDLE SELECTED DOWN AND GEAR CAME DOWN, WITH THREE GREEN INDICATED. AIRCRAFT LANDED WITH OUT FURTHER INCIDENT. MAINTENANCE INSPECTED GEAR FOR DAMAGE OR OBSTRUCTIONS. NONE NOTED. CLEANED AND LUBRICATED GEAR PER MM CHAPTER 12-20-00. NOTED MOISTURE IN PURGED GREASE. CONTINUED GREASING UNTIL NO MOISTURE CAME OUT. PERFORMED GEAR SWINGS IAW MM 32-31-01. NO DISCREPANCIES NOTED. AIRCRAFT RETURNED TO SERVICE.