As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT FAILED TO AUTO PRESSURIZE AFTER TAKEOFF, CABIN ALTITUDE CLIMBED AT A RATE OF 2,000 FPM. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. REPLACED CABIN PRESSURE CONTROLLER AND AMPLIFIER. OPERATIONAL CHECK OK AND AIRCRAFT RETURNED TO SERVICE.