What was found
RETURNED TO DEPARTURE, EXCESSIVE CABIN ALTITUDE RECEIVED ON ECAM. TROUBLESHOOT IAW TSM 21-31-00-810-809-A , PRESSURIZED ACFT, FOUND AFT CARGO DOOR SEAL LEAKING , R & R AFT CARGO DOOR SEAL IAW AMM 52-32-18. PRESSURIZED ACFT IAW AMM 05-53-00, OPS CHECKS NORMAL.