What was found
(CAN) DURING AN INSPECTION MAINTENANCE NOTICED THE LT SIDEWALL LAMP (FORWARD SHORT OR SECOND FROM THE BACK) AT ROW 20A WAS FOUND BURNED. THE LAMP WAS REPLACED AND APPROXIMATELY 1 HOUR LATER WE HAD A FIRE. THE CREW IMMEDIATELY TURNED THE LIGHTS OFF AND PULLED THE CB. THE 20 AMP CB DID NOT POP. THE ASSEMBLY WAS REMOVED AND REPLACED.IT WAS NOTED THAT THE LOCKING RELEASE DID NOT PROTRUDE AS MUCH AS THE NEW ASSEMBLY INSTALLED.