What was found
AIRCRAFT SHUTDOWN AFTER FLIGHT 3/18/23 AT 0921 LEFT SIDE HYDRAULIC FILTER BUTTON FOUND POPPED DURING WALKAROUND 0930 A/C PLACED OUT OF SERVICE
BUTTON WAS RESET AND AIRCRAFT GROUND RAN. BUTTON POPPED DURING GROUND RUN. LEFT SIDE HYD. SYSTEM WAS DRAINED, HYD. FILTER CHANGED, CLOGGING INDICATOR REPLACED AND HYD. SYSTEM SERVICED. AIRCRAFT WAS GROUND RAN NO DISCREPANCY NOTED. AIRCRAFT WAS RETURNED TO SERVICE.