What was found
AUTO PRESSURIZATION SYSTEM FAILED AFTER TAKEOFF, FLIGHT WAS RETURNED TO STL AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED CABIN PRESSURE AMPLIFIER. OPERATIONAL CHECK NORMAL ON GROUND. AIRCRAFT RETURNED TO SERVICE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AUTO PRESSURIZATION SYSTEM FAILED AFTER TAKEOFF, FLIGHT WAS RETURNED TO STL AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED CABIN PRESSURE AMPLIFIER. OPERATIONAL CHECK NORMAL ON GROUND. AIRCRAFT RETURNED TO SERVICE.