What was found
DURING AN INSPECTION, 3 SYSTEMS FAILED, DUE TO SHORTED WIRES. FOUND 3 CRUSHED, BURNED, AND BROKEN WIRES AND 10 OTHER WIRES WITH DAMAGE. THE AREA IS IN THE UPPER CABIN AT THE LAV DOOR. CAUSE WAS A SCREW THAT WAS TOO LONG AND ENTERED A WIRE BUNDLE. REPAIRED WIRES AND PROVIDED PROPER CLEARANCE. SB INSPECTS THIS AREA BUT HAD NOT BEEN COMPLIED WITH. FEEL THIS SB SHOULD BE REVISED TO BE MANDATORY. A SPECIFIC INSPECTION OF THESE SCREWS BE ADDED. THIS COULD HAVE RESULTED IN SMOKE, FIRE AND A LOSS OF SYSTEMS IN FLIGHT.