What was found
FLL - FLT 301 - WHILE EN ROUTE TO RDU, CREW REPORTED HAVING PROBLEMS GETTING AIRCRAFT TO PRESSURIZE AND RETURNED TO FLL. MX FOUND THAT PRESSURE CONTROLLER NR 2 HAD FAULTED. AFTER RESETTING THE CONTROLLER, AIRCRAFT WOULD NOT PRESSURIZE ON THE GROUND PLACED MEL 21-30-1 DMI NR 02369 ON AIRCRAFT AND RETURNED TO RDU UNPRESSURIZED. MIDWAY, MAINTENANCE PERFORMED OPERATIONAL CHECK OF SYSTEM WITH NO FAULTS FOUND, CLEARED DMI. (M)