As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT AT 7000 WITH ONLY ONE PACK WORKING (RH) THE RIGHT PACK FAILED. CABIN ALT CAUTION. RAN QRH AND DID NOT SOLVED THE ISSUE CABIN ALT WARNING NEXT. (FLIGHT 4641 - FILED CLOSED) PLEASE REFERENCE AML 1627900 REMOVED AND REPLACED RIGHT SIDE FUSELAGE PRESSURE REGULATING AND SHUT OFF VALVE REF TO CRJ 200 AMM 36-11-00 OPS TEST GOOD AT THIS TTIME