What was found
WHILE IN HEAVY MAINTENANCE PERFORMING INSPECTIONS IT WAS NOTED THAT STR 25R LOCATED AT BS 720E +4 , HAD EXFOLIATED CORROSION. REMOVED DAMAGED SECTION OF STR. FABRICATED NEW STRINGER, FABRICATED SPLICE, INSTALLED NEW PARTS IAW SRM 53-10-3, 53-10-2 NO OTHER DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.