What was found
(CAN) YAW DAMPER KICKED OFF UNCOMMANDED, GEAR SELECTED DOWN WITH NO FUNCTION, IT WAS NOTICED THAT L/G CNTRL C/B WAS TRIPPED, RESET, LANDING WAS UNEVENTFUL. PILOTS CONTINUED, C/B WAS TRIPPED WITH YAW DAMP ON. YAW DAMPER WAS DISENGAGED, C/B RESET, GEAR SELECTED DOWN. CONTINUED W/O USE OF YAW DAMPER. ON APPROACH C/B WAS NOTED TO BE TRIPPED, WOULD NOT RESET. CONTINUED, GEAR WAS MANUALLY EXTENDED, LANDING WAS NRML. MAINT FOUND WIRING ON LT UP/DOWN LOCK SWITCHES CHAFFED, REPAIRED, REMOVED L/G SEL CONNECTOR PLUG, REINSTALLED. ON APPROACH, L/G C/B TRIPPED AGAIN, IT WAS RESET, GEAR EXTENDED. UNEVENTFULL LANDING. DETERMINED SEL VALVE ON HYDR PWR PACK WAS INTERMITTENT. PWR PACK WAS REPLACED, AC RETURNED TO SERVICE.