What was found
FLIGHT CREW REPORTED AIRCRAFT WOULD NOT PRESSURIZE. AIRCRAFT RETURNED TO DEN. REPLACED TURBOFAN, PERFORMED PRESSURIZATION SYSTEM OPERATIONAL TEST AND CHECKED OKAY.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT CREW REPORTED AIRCRAFT WOULD NOT PRESSURIZE. AIRCRAFT RETURNED TO DEN. REPLACED TURBOFAN, PERFORMED PRESSURIZATION SYSTEM OPERATIONAL TEST AND CHECKED OKAY.