As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING HEAVY MAINT UNABLE TO RESET CARGO LIGHT CB. WIRING INSIDE ONE FORWARD CARGO LIGHT POT ASSY WAS SHORTING. WIRE INSULATION MISSING AND BRITTLE FROM HEAT. WIRE HARNESS REPLACED IN ALL LIGHT ASSEMBLIES. FLEET CAMPAIGN TO BE CARRIED OUT.