As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK FAILED FOLLOWED QRH, DESCENDED TO 25FL THEN LT PACK FAILED, LOST PRESSURIZATION. DIVERTED. DECLARED AN EMERGENCY AND DEPLOYED OXYGEN MASKS. CLEANED CABIN TEMPERATURE SENSOR FAN IAW AMM. RAN BOTH PACKS, WITH ENGINES AND PRESSURIZED A/C IAW AMM. OPS CHECK GOOD NO FAULTS FOUND.