As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5249 - LEFT AND RIGHT PRSOV'S AS WELL AS ISOLATED VALVE BEGAN CYCLING OPEN AND CLOSED. RAPID PRESSURIZATION LOSS OCCURRED. DECLARED EMERGENCY, FOLLOWED QRH, ISOLATION FAULT MESSAGE DISPLAYED. LANDED WITHOUT INCIDENT. OPS CHECKED PRSOV'S BOTH SIDES, PERFORMED CRJ700/900-SL-36-014. NO DEFECTS FOUND.