As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB FROM FHAW, THE CREW NOTICED THE HYDRAULIC QUANTITY BEGAN DECREASING. THE CREW RAN THE HYDRAULIC LOSS OF QUANTITY CHECK LIST AND RETURNED TO FHAW AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE NUMBER THREE ENGINE HYDRAULIC HIGH PRESSURE LINE LEAKING. MAINTENANCE REPLACED THE LINE, SERVICED THE HYDRAULIC RESERVOIR. THE OPERATIONAL AND LEAK CHECKS WERE GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE IAW DACO DC8 MM 29-10-12.