What was found
INSPECTION FOUND DOUBLER HAS 2 HOLES BURNED THROUGH BY ELECTRICAL ARCING. STATIC ELECTRIC BUILD-UP ON OUTER PANEL TRAVELING THROUGH RIVETS TO DOUBLER AND DISCHARGING THROUGH DOUBLER. THIS IS BEING CAUSED BY A POOR DESIGN OF NOT HAVING THE RIVETS INSULATED FROM ANTI-STATIC MATERIAL ON OUTER SURFACE ENHANCED BY THE REPAIR USING EXPANDED METAL AS ANTI-STATIC PROTECTION. THIS REPAIR DOES NOT BOND ADEQUATELY AND GROUND IS NOT RELIABLE AT THE EDGES. SUBMITTER STATED RIVETS SHOULD BE SEALED OVER WITH FIBERGLASS PRIOR TO REPAIRING THE ANTI-STATIC AND EXPANDED METAL SHOULD NOT BE USED IF IT CANNOT BE RELIED ON TO HAVE A GOOD BOND. NOTE: THERE IS AN OIL CHECK DOOR IN PANEL, A FIRE COULD HAPPEN.