What was found
DURING AIRCRAFT CURRENT CHECK AT AIRBORNE (TAMPA), CORROSION WAS FOUND ON THE LH WING SKIN PANEL NO. 1(112T4102-1) AT THE REAR SPAR AND WS 440-450. THE CORROSION IS LOCATED ON THE UPPER SURFACE OF THE BOTTOM SKIN AND TRAVELS BETWEEN THE SKIN AND REAR SPAR, AND CLOSE TO THE AFT PITCH LOAD FITTING AND STRUT HYDRAULIC ATTACH BRACKETS. SEE FIGURE 1. BOEING WAS CONTACTED VIA SERVICE REQUEST #4-5408970356. THIS REA PROVIDES REPAIR INSTRUCTIONS FOR THE SUBJECT DAMAGE. REPAIRED LOWER WING SKIN IAW ABX-REA-5720-64374-00.