What was found
UPON A SCHEDULED INSPECTION AT AERO CORP IN LAKE CITY, FL, THE LEFT INBOARD AFT FLAP, ONE AREA OF SEVERE I/G CORROSION (100 PERCENT THROUGH MATERIAL) THROUGH UPPER SKIN SURFACE. REMOVED AND REPLACED THE LEFT INBOARD AFT FLAP IAW B727 MM 27-51-1. OPS CHECK GOOD. (M)