As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING, OUTFLOW VALVE WAS IN THE CLOSED POSITION WHILE SWITCH WAS IN AUTO MODE. ACFT GROUNDED. ACCOMPLISHED PRESSURIZATION CONTROL BITE AMM 21-31-00. OPS CHECKED NORMAL NO FAULTS FOUND. DID A VISUAL INSPECTION OF THE OUTFLOW VALVE FOR OPERATION AND OBSTRUCTIONS, NO FAULTS NOTED, NO HISTORY 30 DAYS.