As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. RETURNED TO PHL ACCOUNT HYDRAULIC QUANTITY DECREASED. AN EMERGENCY WAS DECLARED AND THE FLIGHT LANDED OVERWEIGHT WITHOUT INCIDENT. AIRCRAFT WAS REMOVED FROM SERVICE. MAINTENANCE FOUND SMALL HOLE IN ENGINE DRIVEN PUMP NR 1 CASTING. REPLACED PUMP PER AMM 29-11-01. FLUSHED EDP HOSES, AND REPLACED PRESSURE AND CASE DRAIN FILTER ELEMENTS PER AMM 29-11-05.