As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE LT PACK WENT OFF LINE, FOLLOWED BY LEFT DUCT WARNING. TURNED INTO CAUTION MESSAGE. STARTED DESCENT FOLLOWED BY RT DUCT WARNING AND CAUTION MESSAGE. EMERGENCY WAS DECLARED. FLAGGED RT BLEED LOOP A 145 & RT LOOP B 146, LOOP LT 137 & LT LOOP B 142. RESET RT FLOW CONTROL VALVE, LEAK CHECKED GOOD. CLEANED LOOP 137, OPS CHECKED GOOD. PERFORMED BLEED LEAK TEST AND OPS CHECKED THE AC SYSTEM BLEED. OPS CHECKED GOOD.