What was found
DURING ROUTINE PHASE INSPECTION, TECH IDENTIFIED A BUBBLE IN THE PAINT ON LT SIDE OF FUSELAGE BELOW THE PILOTS DV WINDOW. UPON INVESTIGATING THE BLISTER, A HOLE THROUGH THE SKIN WAS IDENTIFIED UNDER THE PAINT. HOLE SIZE APPROX .7500" IN SIZE. APPEARANCE OF HOLE INDICATES CAUSED BY CORROSION. WHILE REMOVING INSULATION TO EFFECT REPAIR OF THIS HOLE ADDITIONAL CORROSION WAS IDENTIFIED FROM MOISTURE BEING TRAPPED BEHIND THE STICK ON CORROSION BLANKET. THE REPAIR TOTALED A 6" X 9" AREA UPON COMPLETION.