What was found
IAH - FLIGHT 2656, THE CREW REPORTED THAT THE CABIN PRESSURIZATION RATE BELOW 20,000 FLUCTUATES WILDLY UP +/- 2500FPM, AND APPEARED TO BE AFFECTED BY THRUST LEVER SETTING. THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT WHERE MAINTENANCE INSPECTED THE AIRCRAFT AND RESET THE CABIN PRESSURE ACQUISITION MODULE (CPAM), OPERATIONALLY TESTED WITH NO DEFECTS. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (A)