As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN ROUTE-ECAM MESSAGE LEFT AFT CABIN DOOR OPEN. NORMAL PRESSURIZATION. FLIGHT ATTENDANT REPORTED LOUD SQUEAL DURING DECENT FROM LEFT AFT CABIN DOOR. MAINTENANCE ADJUSTED PROXMITY SWITCH 15WV1 PER AMM 52-71-00-820-001A AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.