What was found
AFTER A/C ON BLOCK, FOUND THE DADO PANEL ON SIDE WALL PANEL 64A, 65A HAS SMOKE. MAINTENANCE USED ONE FIRE BOTTLE TO EXTINGUISH THE SMOKE, TROUBLESHOOTING FIND: THERE WAS ARCING ON THE APU NR1 GENERATOR FEEDER CABLE, ALSO FOUND THE RIVETS ON THE STAND-OFF FOR SUPPORTING THE CABLE WAS SHEARED, THE UNSUPPORTED CABLE WAS DROPPED AND CONTACTED THE LOWER SIDE BOLT CAUSED THE ARCING DURING APU LANDING START.