As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO PRESSURIZE CABIN IN ANY MODE. OUTFLOW VALVE SHOWS FULL CLOSED, LOUD AIR NOISE COMING FROM DOOR ONE LEFT. *S/D* FOUND OUTFLOW VALVE NOT CLOSING. AC MOTOR CLOSE LIMIT SWITCH NOT OPERATING. REPLACED AFT OUTFLOW VALVE, OPS CHECK GOOD.