As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT WAS RETURNED TO EWR AFTER LOSS OF THE A-HYDRAULIC SYSTEM. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND A-SYSTEM RETURN LINE IN LT MLG WHEEL WELL CHAFED AGAINST ANOTHER HYDRAULIC LINE. BOTH HYDRAULIC LINES WERE REMOVED AND REPLACED AND LEAK CHECKS WERE GOOD.