As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: UN-COMMANDED PRESSURIZATION SYSTEM CHANGE TO MANUAL. MAINTENANCE ACCOMPLISHED TEST OF CABIN PRESSURE CONTROLLERS #1 AND #2, SYSTEM PASS TEST REPLACED DISPLAY MANAGEMENT COMPUTER #2 AS A PRECAUTIONARY PER AMM 21-31-34 AND AMM 31-63-34 NO FAULT NOTED ON GROUND CHECK.