What was found
DURING TRANSIT CHECK, A BURNED ODOR WAS DETECTED IN PASSENGERS CABIN. MAINTENANCE PERSONNEL CHECKED AFFECTED AREA AND A LAMP IN RAW 3 WAS DETECTED OVERHEATED. THE LAMP WAS REPLACED IAW MM 33-21-03 BUT FAILURE CONTINUED. AIRCRAFT WAS SENT TO THE HANGAR AND DURING CHECK, THE LOWER SIDE WALL LIGHT SOCKET WAS DETECTED BURNED, SO IT WAS REPLACED IAW MM 33-22-18, TESTED CORRECT.