As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 780 - OMA/LAS - AIR TURN BACK, CREW REPORTS THAT THEY ARE NOT ABLE TO PRESSURIZE AIRCRAFT IN AUTO OR MANUAL MODE. AIRCRAFT MAINTENANCE FERRIED TO PHX STATION. REMOVED AND REPLACED CABIN PRESSURE CONTROLLER. AIRCRAFT OPERATES NORMALLY AT THIS TIME. (M)