As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: TEST OF EMERGENCY LIGHTING SYSTEM FAILED. **SUPPLEMENTAL REPORT FOR AALA202110019362: MAINTENANCE FOUND THE R4 DOOR SLIDE EMERGENCY LIGHTS HAD AN INTERNAL FAILURE AND WAS BAD FROM STOCK. REPLACED THE SLIDE AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER TASK CARD 26L00025011** (CLOSED)