What was found
AIRCRAFT 682, AD RELATED DURING ROTO TEST OF ENGINE 2 UPPER SKIN. DRAG FITTINGS HOLE #2 WAS FOUND TO HAVE MULTIPLE CRACKS IN THE SKIN LAYER AND SIGNAL TO NOISE RATIO ISSUES IN THE FITTING LAYER. CRACKS IN THE SKIN LAYER NOTED AT 4:00 AND 10:00 POSITION. SIGNAL TO NOISE RATIO ISSUES IN THE FITTING LAYER NOTED BETWEEN THE 8:00 AND 11:00 POSITION. CORRECTIVE ACTION: REPAIRED WING/ OUTER WING/ RHS UPPER SKIN DRAG FTG'S/ CORROSION AND CRACKS. HOLE #2 IAW DELTA ER/A 609175-14AD MAJOR REPAIR 8100 -9 DATED JUN 08,2023. (LP 2814749)