What was found
LH WING FIXED LEADING EDGE RIB CORROSION. REMOVED CORROSION AT LH WING FIXED LEADING EDGE RIB AS PER SRM 57-41-13-1A-1 ILES 338.33-ILES 375.50 L: 1.1"" W: 16.15"", ILES 375.50 - ILES 414.50 L: 1.1"" W: 29.92". PERFORMED SURFACE HFEC INSPECTION AT LH WING FIXED LEADING EDGE RIB BLENDED OUT AREA PER 747 NDTM 51-00-00 PART 6 PROCEDURE 23, RESULT NORMAL. PERFORMED ULTRASONIC THICKNESS MEASUREMENT AT LH WING FIXED LEADING EDGE RIB BLENDED OUT AREA WITH 1CM GRID PER 747 NDTM 51-00-00 PART 4, RESULT: NORMAL. APPLIED ALODINE AND PRIMER AT DAMAGE. REMOVED AREA AS PER SRM 57-41-13-1A-1 AND SRM 51-20-01. NO FURTHER DEFECTS NOTED.