As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5994, HOT TO HOT (CHECK FLIGHT) - DURING DESCENT BACK INTO HOT DURING A MAINTENANCE FLIGHT THE CREW RECEIVED A LOW OIL PRESSURE WARNING. THE QRH WAS FOLLOWED AND E2 WAS SHUT DOWN. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED AN ENGINE GROUND POWER RUN AND COULD NOT DUPLICATE FAULT IAW CRJ AMM 71-00-00.