What was found
PDIS 641 21-31 2379721 19OCT20 ROA CLOSE. CABIN AUTO PRESS FAIL IN FLIGHT WITH NO ASSOCIATED MESSAGES. MANUAL PRESS FUNCTION OK. FACT 19OCT20 13:32 ROA. T/S USING FIM 21-31-00-810-809-A STEPS 1 AND 2. OPERATIONS CHECKED, IAW AMM 21-31-00-700-802-A, NO DEFECTS NOTED AT THIS TIME. OK FOR SERVICE.