What was found
FOUND DURING SCHEDULED B-SERVICE CHECK AND ACCOMPLISHMENT OF AD 85-24-02, SB 727-51-17. APPROXIMATELY 1.50 INCH DIAMETER AREA OF EXFOLIATING CORROSION AT WING CENTER SECTION SKIN ABOVE LT AFT HEAT EXCHANGER VIEWED THROUGH AFT OUTBOARD CUT IN FIBERGLASS PLENUM BELLY ACCESS DOOR 33516. POSSIBLY CAUSED BY ENVIORNMENTAL CHANGES AND MOISTURE IN AREA. (X)