What was found
AIRCRAFT RETURNED TO DEN DUE TO A CABIN PRESSURIZATION PROBLEM. *S/D* FOUND AIR TASK VALVE NOT CLOSING. REPLACED AIR TASK VALVE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT RETURNED TO DEN DUE TO A CABIN PRESSURIZATION PROBLEM. *S/D* FOUND AIR TASK VALVE NOT CLOSING. REPLACED AIR TASK VALVE.