As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: ECAM MESSAGE FOR DOOR LEFT AFT EMERGENCY EXIT DISPLAYED WHILE CLIMBING THROUGH 8000FT AND DISAPPEARED IN A FEW SECONDS. MAINTENANCE REPLACED THE DETECTOR PROXIMITY SWITCH FOR THE 3L EMERGENCY EXIT DOOR PER AMM 52-71-13 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.