What was found
THIS AIRCRAFT WENT INTO MAINT ON 4/20/2006 FOR REPLACEMENT OF THE LEFT WING DEICE BOOT. SEVERE CORROSION WAS NOTED ON LOWER WING SKIN PANEL, PN 652200497, WHEN BOOT WAS REMOVED. PANEL REQUIRED REPLACEMENT. SL, WINGS-NOTIFICATION OF LEADING EDGE SKIN REWORK REQUIREMENT WHEN A DEICE BOOT IS REMOVED. THIS SL IS REQUIREMENT TO PERFORME A ONE-TIME REWORK OF A PORTION OF THE WING L/E SKIN TO PROVIDE ADDITIONAL CORROSION PROTECTION WHEN A DEICE BOOT IS REMOVED AND TO INFORM THAT INSPECTION ITEM CODES A301009 AND A571004 ARE NO LONGER APPLICABLE TO THE WINGS AFTER THE REWORK HAS BEEN ACCOMPLISHED.(K)