As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PVD REPORTED LOSS OF SYSTEM ONE HYDRAULIC QUANTITY IN CRUISE FLIGHT, DECLARED EMERGENCY AND DIVERTED INTO EWR.. A/C LANDED UNEVENTFULLY. MX FOUND A CUT HYDRAULIC HOSE ON LEFT ENGINE DRIVEN PUMP..REMOVED/REPLACED HYDRAULIC HOSE ON LT. EDP IAW EM145 MM29-20-04. OPS. AND LEAK CHECKED GOOD.