As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE THE CREW REPORTED TOTAL LOSS OF THE NR 1 HYDRAULIC SYSTEM PRESSURE AND FLUID QUANTITY. MAINTENANCE FOUND THE LEFT ENGINE DRIVEN HYDRAULIC PUMP LEAKING. THE LEFT EDP WAS REMOVED & REPLACED IAW CRJ700 AMM 29-11-01-400-801-A01. ALL OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.