As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL240, RECEIVED CABIN ALT CAUTION MSG FOLLOWED BY WARNING. ALL CABIN PRESSURE WAS LOST. PERFORMED EMERG DESCENT & C/W ALL QRH`S. LANDED UNPRESSURIZED. RT PACK INDICATED 43 PSI WITH NO AIR FLOW. ARINC COOL CAUTION MSG IN FLIGHT ALSO. FOUND BOTH DUCTS AT PRECOOLER BENT, PREVENTING CORRECT INSTALLATION R & R BOTH PRECOOLER DUCTS AND COUPLINGS. INSTALLED DUCTS FROM PRECOOLER TO HEAT EXCHANGER.