As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EWR - FLT 0398 - THE BLUE SYSTEM HYDRAULIC QUANTITY DECREASED TO TOP OF YELLOW ARC WHILE IN FLIGHT. THE SERVOS WERE TURNED OFF PER THE 'ABNORMAL' CHECK LIST AND THE HYDRAULIC FLUID LOSS CEASED. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND A BLUE SYSTEM FIRE RESISTANT HYDRAULIC LINE LEAKING AT THE COUPLING. THE PRESSURE LINE WAS REPLACED. LEAK CHECK DURING ENGINE RUN WAS GOOD. (X)