What was found
DURING CRUISE FROM KSJC TO KRFD, FLT ENGINEER NOTICED HYDRAULIC QUANTITY INDICATOR WAS AT THE BOTTOM OF NORMAL QUANTITY, DID NOT DROP ANY FURTHER DURING THE REST OF THE FLT. THE CREW LANDED IN KTOL WITHOUT FURTHER INCIDENT. MX SERVICED HYDRAULIC SYS, OPS CHECK GOOD IAW DACO DC8 MM 29-00-00. AC WAS RETURNED TO SERVICE.