As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: CABIN PRESSURE LOW PRESSURE ELECTRONIC CENTRALIZED AIRCRAFT MONITOR CAME ON AT 6000FT- OUTFLOW VALVE OPENED AND ELECTRONIC CENTRALIZED AIRCRAFT MONITOR CLEARED ON LANDING- OUTFLOW VALVE AMBER AND SAFETY VALVE OPENED AT 6000FT. REMOVED AND REPLACED CABIN PRESSURE CONTROLLER PER AMM 21-31-34.