As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: LEFT AFT CABIN DOOR ECAM INDICATION DISAGREES WITH DOOR STATUS.( ECAM SHOWS 4L SLIDE NOT ARMED). REPLACED 4L DOOR SLIDE ARM PROXIMITY SWITCH AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 52-73-11.