As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 1023 - DIV - TO MEM DUE TO AIR APU BLEED LEAK ECAM MESSAGE. DUE TO ICING COULD NOT CONTINUE TO ATL. CORRECTIVE ACTION: FOUND APU CHECK VALVE (7260HM) STICKING AND NOT SEATING PROPERLY. REPLACED APU CHECK VALVE. LEAK CHECK GOOD. (LP 4203536)