As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW DIVERTED THE ACFT, FOLLOWING THE LOSS OF CONTROL OF CABIN PRESSURIZATION AT FL330. PASSENGER O2 MASKS DID NOT DEPLOY BUT ACFT WAS REQUIRED TO DESCEND TO 10,000 FT AND DECLARED AN EMERGENCY. MX FOUND BOTH PACKS SHUTTING OFF AT CRUISE POWER SO BOTH OF THE PRVS AND THE AC PILOT PRESSURE REGULATOR WERE REPLACED.