As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SUPPLEMENTAL INFORMATION - MX EMERGENCY ESCAPE PATH LIGHTING SEAT MOUNTED AT 20F INOPERATIVE. MX VERIFIED SOCKET AND BULB OPERATE NORMALLY AND NOW SUSPECT THE WIRING HARNESS IN SEAT. MX FOUND HARNESS UNPLUGGED AND RESECURED IT. LIGHTS NOW CHECK OK.