What was found
UNUSUALLY STRONG ODOR NOTED IN MAIN E/E COMPARTMENT. COULD NOT POSITIVELY IDENTIFY NATURE OF ODOR. PERFORMED INSP OF E/E ELECTRICAL COMPONENTS AND WIRING. NO TROUBLE FOUND. ALL C/B-S IN. INSPECT FWD CARGO BIN. ALL OKAY. ODOR DISSIPATED AFTER 2 HOURS. MAIN E/E COMPARTMENT LIGHTS NOTED TO GO INTERMITTENTLY DIM THEN BRIGHT. AFTER 2 HOURS LIGHTS INTERMITTENTLY UNCONTROLLABLE FROM E/E LIGHTS SWITCHES IN BOTH ON OR OFF POSITIONS. FWD TO MCO AND PLAC 33-31-01. C/B PULLED AND COLLARED. REPLACED DEFECTIVE SWITCH. E AND E LIGHTS WORKING NORMAL. ETOPS CATEGORY 'E': PROBLEMS WITH SYSTEMS CRITICAL TO ETOPS.