As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO PRESSURIZATION FAIL SWITCHED TO ALT. FOUND FAULT ON CABIN PRESS CONT NR 2 FLIGHT LEG OO CODE O78 OFU LRU FAIL 38214. VERIFIED P/N 4063 19972 01AA WITH SEAMC. REMOVED AND REPLACED AFT OUTFLOW VALVE REF MM 21 31 03 19382. DFPC BITE TEST GOOD, PRESSURIZATION SYSTEM TEST GOOD, PRESSURIZATION SYSTEM MANUAL MODE TEST GOOD REF FIM 21 31 00 810 801 38214.