As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 0197 - DIV - DIVERTED TO DTW DUE TO AUTO CABIN PRESSURIZATION FAILED. CREW WAS ABLE TO CONTROL THE CABIN PRESSURE MANUALLY PER QRH. CREW DECIDED TO DIVERT TO A STATESIDE HUB WITH OCC AND MCC CONCURRENCE. NO EMERGENCY WAS DECLARED; FLIGHT DIVERTED TO DTW. CORRECTIVE ACTION: MAINTENANCE REPLACED NR 1 AND 2 CABIN PRESSURE CONTROLLER. LP 6279710