As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYDRAULIC SYSTEM 2 FAILURE, DECLARED EMERGENCY AND RETURNED TO ORD. REMOVED AND REPLACED NUMBER 2 HYDRAULIC ENGINE DRIVEN PUMP IAW CRJ AMM 29-11-01 AND AMERICAN EAGLE WORK CARD 02-05-900-016 WITH NO DEFECTS NOTED. RETURNED AIRCRAFT TO SERVICE.