What was found
AFTER SHUTDOWN, ECAM RESDUAL CABIN PRESSURE WITH WARNING LIGHTS, ALL DOORS, WITH NO DIFFERENTIAL PRESSURE. ACFT GROUNDED. PERFORMED AN OPS TEST OF RPCU IAW AMM 21-31-00, OPS CHECKED GOOD , PERFORMED A TEST OF THE CPC NR 1 AND 2 IAW AMM 21-31-00, NO FAULTS , TESTED GOOD