As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CVG TO PWM - EN ROUTE HYDRAULIC 1 LOW QUANTITY INDICATION, FOLLOWED QRH AND APPROXIMATELY 3 MINUTES LATER, INDICATION WENT TO NEAR ZERO. DECLARED EMERGENCY AND DIVERTED TO CLE. UPON LANDING RECEIVED ENG 1 HYD PUMP FAIL INDICATION AND FAILURE OF HYDRAULIC SYSTEM 1. REQUIRED TUG TO GATE. MAINTENANCE INSPECTED AND FOUND HYDRAULIC FLUID COMING FROM DRAIN OF NR 1 SYSTEM EMDP. MAINTENANCE REMOVED AND REPLACED NR 1 SYSTEM EMDP, SERVICED AND OPERATIONALLY AND LEAK CHECKED PUMP.