What was found
THE FLIGHT CREW REPORTED THAT DURING THE POSTFLIGHT IT WAS DISCOVERED THE FREON AIR CONDITIONING SYSTEM WAS INOP. THE AIR CONDITIONING SYSTEM WAS DEFERRED ON MEL AND AIRCRAFT OPERATIONS WERE CONTINUED. THE MAINTENANCE PROVIDER TROUBLESHOT AND FOUND THE COMPRESSOR MOTOR WAS NOT WORKING. THE MOTOR WAS REMOVED, AND AN OVERHAULED UNIT WAS INSTALLED. OPERATIONAL CHECKS WERE SATISFACTORY. MEL WAS CLEARED AND THE AIRCRAFT WAS RETURNED TO SERVICE.