As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS 3L EMER. EXIT IND DISAGREE WITH DOOR STATUS, ECAM - LEFT AFT EMER EXIT. 8000-9000 FEET 3.5 PSI DIFF. MAINTENANCE REMOVED AND REPLACED THE DOOR SLIDE INDICATOR LIGHT IAW AMM 52-73-21. OPS CHECK GOOD.