As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERTED TO BILLINGS WITH A LOSS OF HYDRAULIC FLUID IN THE NR 1 SYSTEM. (FLT 6385) REPLACED ENGINE DRIVEN PUMP, REPLACED HYDRAULIC SYSTEM NR 1 CASE DRAIN FILTER, AND PRESSURE FILTER IN REFERENCE TO CRJ MM. P/N: 66190-05 S/N OFF: K0861; P/N: AC7031F8; P/N: AC9607F10Y3.