As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 4072 TO LGA REPORTED COMPLETE LOSS OF NR 2 HYDRAULIC CONTENTS IN FLIGHT. AIRCRAFT RAN FOR 20 MINUTES WITH NO FLUID IN AFFECTED SYSTEM. MAINTENANCE INSPECTED AND FOUND THE NR 2 HYDRAULIC PRESSURE MANIFOLD AT FAULT WITH A BROKEN OFF FITTING. MAINTENANCE REPLACED THE MANIFOLD AND THE NR 2 ENGINE DRIVEN HYDRAULIC PUMP. THE CASE DRAIN FILTER WAS ALSO REPLACED. AIRCRAFT WAS GROUND RUN AND ALL OPERATIONAL AND LEAK CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE.