As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: EMERGENCY POWER SUPPLY UNIT SYSTEM TEST FAILED 10WL ESCAPE SLIDE FORWARD. MAINTENANCE FOUND WIRE W3351-5102 DAMAGED NEAR CONNECTOR 2818V AND REPAIRED IT PER ESPM 20-43-11. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.