As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS FLIGHT 2466 WAS CLIMBING AFTER TAKEOFF WHEN THE AUTO-MANUAL PRESSURE CONTROLLER WAS GIVING FLUCTATIONS AND THE CONTROLLER WOULD'NT ADJUST. THE PILOT BROUGHT THE A/C BACK TO TYS. MAINTENANCE REMOVED AND REPLACED THE DIGITAL CONTROLLER IAW EMB 145 MM 21-31-01 AND OPS CHECK WAS GOOD IAW EMB 145 MM 21-31-00. A/C RELEASED TO SERVICE.