What was found
ON CLIMBOUT, AIRCRAFT FAILED TO PRESSURIZE. FOLLOWED COCKPIT OPERATING MANUAL PROCEDURE AND RETURNED TO DTW. FLIGHT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE PRESSURE CONTROL AMPLIFIER, SYSTEM OPERATIONAL CHECK OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ON CLIMBOUT, AIRCRAFT FAILED TO PRESSURIZE. FOLLOWED COCKPIT OPERATING MANUAL PROCEDURE AND RETURNED TO DTW. FLIGHT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE PRESSURE CONTROL AMPLIFIER, SYSTEM OPERATIONAL CHECK OK.