As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: UPON WORKING A CHECK TASK CARD 26C00033004, EMERGENCY POWER SUPPLY UNIT 10WL FAILED INTERNAL/EXTERNAL FAULT TEST. FOUND L1 DOOR SLIDE AT FAULT AND REPLACED IT PER TASK CARD 26L00025011. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.