As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TC 25-220-00-01 ACCOMPLISHMENT ON L1 DOOR WAS OBSERVED THAT AFTER EMERGENCY ESCAPE SLIDE DEPLOYMENT ALL EMERGENCY LIGHTS STAY OFF. AFTER FURTHER INVESTIGATIONS WAS FOUND THAT EMERGENCY BATTERY TOTALLY BROKEN. SLIDE REMOVED FOR SHOP OVERHAUL. TIME SINCE OH UNKNOWN AT THE MOMENT.