As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 883 EN ROUTE. CABIN AUTO INOPERATIVE LIGHT CAME ON, WENT TO MANUAL. OUTFLOW VALVE WOULD NOT MOVE. CABIN WAS NOT CONTROLLABLE, BUT WAS CONTROLLABLE USING THRUST AND SLOW DESCENT. NORMAL LANDING . MAINTENANCE FOUND OUTFLOW VALVE INOPERATIVE REMOVED AND REPLACED CABIN PRESSURE OUTFLOW VALVE.