As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2571 - EWR - DURING CLIMB, FLIGHT CREW REPORTED NR 1 HYDRAULIC LOW QUANTITY MESSAGE ON EICAS. CREW PERFORMED AIR RETURN AND LANDED ACFT WITHOUT ANY INCIDENT. EWR MX SERVICED NR 1 HYDRAULIC SYSTEM AND PERFORMED LEAK CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.