What was found
FUSELAGE SKIN FS 720 S-28L-28R, REPAIR FOR SKIN CORROSION. THE FUSELAGE SKIN WAS FOUND CORRODED AT FS 720 BETWEEN STRINGERS 28L AND 28R, DURING ROUTINE INSPECTIONS PER AD 91-09-09. THE CORRODED AREA OF SKIN WAS CUTOUT AN REPAIRED WITH AN EXTERNAL ALUMINUM DOUBLER PER B727 SRM 53-30-3, FIG. 1. THE REPAIR WAS DOCUMENTED PER ER/A 365810-14AD, REV A.