As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE EN ROUTE, FLIGHT EXPERIENCED HOT ELECTRICAL SMELL/HEAT AT CABIN AREA CONTROL PANEL DOOR 4R AREA. PULLED CIRCUIT BREAKER AND SMELL/HEAT DISAPPEARED. *S/D* INSULATION AT THE BASE OF THE LAMPS OVERHEATED DUE TO THE FAILURE OF THE LAMP. THE CACP WAS REPLACED MARCH 19TH IN LONDON. THERE HAVE BEEN NO FURTHER PROBLEMS ON THIS ACFT.