As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: EMERGENCY POWER SUPPLY UNIT 10WL FAULT MESSAGE. MAINTENANCE PERFORMED TSM 33-51-00-810-822-A AND REPLACED THE L1 PASSENGER / CREW DOOR SLIDE PER TASK CARD 26L00025011. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.