As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED: MASTER WARNING CABIN ALTIMETER CAME ON AFTER THE AMBER ALTITUDE WHEN LEVELING OFF AT 32000FT. C REW COMPLIED WITH AN EMERGENCY DECENT AND DIVERTED AS REQUIRED. MAINTENANCE FOUND DUCT HAD COME OFF OF THE ACM. ACM DUCT WAS RESECURED AND SYSTEM WAS LEAK AND OP CHECKED WITH NO ADDITIONAL DEFECTS NOTED.