As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT CHECK, FOUND AFT FLOOR PROXIMITY EMERGENCY LIGHTS INOPERATIVE. REPLACED BATTERY PACK AND POWER SUPPLY WITH NO HELP. FOUND PIN 10 ON CANNON PLUG TO POWER SUPPLY SHORTED OUT. SHOOK WIRING IN CATWALK AND AFT TAILCONE SLIDE AREA. OPERATIONAL CHECK NORMAL.