As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 23000 FT, FAULT ANNUNCIATOR ON PRESSURIZATION CONTROLLER. MANUAL MODE WORKED FINE. CDS REPORTS "INDICATOR MODULE FAIL" & AFT OUTFLOW VALVE FAIL MESSAGES-CLEARED IND MOD FAIL IAW FIM TASK 21-30-00-810-813. REPLACED AFT OUTFLOW VALVE IAW AMM TASKS 21-31-16-000-801 & 21-31-16-400-801. OPS CK GOOD-NO FURTHER FAULTS FOUND. RETURNED TO SERVICE.