As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: ESCAPE SLIDE / EMERGENCY POWER SUPPLY UNIT 15WL FAULT DURING SYSTEM TEST. MAINTENANCE FOUND CLEANED ESCAPE SLIDE CONNECTOR 1869VC-A PER ESPM 20-55 AND TSM 25-62-00-810-815-A. A SATISFACTORY OPERATIONAL CHECK OF THE EMERGENCY LIGHTS WAS ACCOMPLISHED.