As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2334 EWR TO SDF, CREW REPORTED HYDRAULIC SYSTEM NR 1 FAILED IN FLIGHT. FLIGHT DIVERTED TO RIC. RIC MX FOUND THE CAUSE OF FLUID LOSS TO BE AT THE NR 1 HYD MANIFOLD, EDHP PRESSURE SWITCH. MX REMOVED AND REPLACED THE PRESSURE SWITCH O-RING AND DUE TO THE SYSTEM BEING RUN OUT OF FLUID ALSO REPLACED NR 1 EDHP AND NR 1 EMDP ALONG WITH DECONTAMINATING THE FLUID SYSTEM AND CHANGING NR 1 SYSTEM HYD FLUID FILTERS.