As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR RETURN CREW REPORT ECAM MSG AFT CARGO DOOR ON AT 4000 FT FWD TO MEL VERIFIED AFT CARGO DOOR LOCKED NOC DESK: 320 NAME: SH DATE: 28-OCT-19- APPROVED MEL 5270D C/W DDP DOOR CLOSED PERFORMED LGCIU1 BITE FOUND AFT CARGO DOOR PROX SWITCH 34WV FAULT REF AMM 32-69-00-740-001-A. REPLACED AFT CARGO DOOR PROX SWITCH 34WV REF AMM 52-71-12 OPS CHECK GOOD