As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT - FL 0576, AFTER TAKEOFF, CREW RECEIVED THE NR 1 CENTER HYDRAULIC PUMP PRESS LIGHT. CREW NOTED LOSS OF HYDRAULIC QUANTITY FROM CENTER SYSTEM. FLIGHT RETURNED TO PIT WITH NO FURTHER INCIDENT. MAINTENANCE REPLACED TWO HYDRAULIC LINES (PUMP TO FILTER MODULE LINES). (M)