What was found
BDL - FLT 2743 - AIRCRAFT DEPARTED BDL WITH MEL 21-14A APPLIED, CABIN PRESSURE CONTROL SYSTEM AUTOMATIC MODE INOPERABLE. AFTER TAKEOFF, THE CAPTAIN REPORTED THE STANDBY MODE WOULD NOT WORK AND THE AIRCRAFT WOULD NOT PRESSURIZE PROPERLY. FLIGHT RETURNED TO FIELD AT BDL AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE CABIN PRESSURE CONTROLLER. OPERATIONAL CHECK GOOD. CLEARED MEL 21-14A. (X)