What was found
FOLLOW-UP TO HISTORY OF AUTO FAIL LIGHT COMING ON. ACFT GROUNDED. IAW TSR 817248, STEP 1, ACCOMPLISHED FIM TASK 21-31, TASK 827. NO FAULT LOGGED ON CABIN PRESSURE CONTROLLER IAW TSR STEP 2, REMOVED BOTH CABIN PRESSURE CONTROLLERS AND EXAMINED RACK CONNECTORS FOR PUSHED BACK PINS AND ANOMALIES. NONE FOUND. IAW TSR STEP 3, SWAPPED NR 2 CPC WITH NR 1 CPC AND REPLACED NR 2 CPC REF AMM 21-31-01-000-801 AND AMM 21-31-01-400-801. ACCOMPLISHED PRESSURIZATION SYS GROUND TEST REF AMM 21-31-00-700-802, CHECKED OK.