As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT PACK TEMP CAUTION AT 26,000 CLIMBING. RAN QRH AT 30,000. RT PACK TEMP CAUTION. BEGAN DESCENT AND RAN QRH. CABIN ALT CAUTION THEN WARNING. RAN QRC/QRH. CABIN O2 MASKS DEPLOYED IN FLIGHT. / REMOVED AND REPLACED LEFT ACSC IAW CRJ700 AMM 21-61-04-000/400-801-A01. OP CHECK GOOD. REMOVED AND REPLACED AIR CONDITIONING CONTROL PANEL IAW AMM 21-61-02-000/400-801-A02. OPS CHECKS GOOD.