What was found
PROBLEM DESCRIPTION: REPAIR – FUSELAGE SKIN STA 474.5, STA 476, STA 615.5, STA 1346 AND STA 1373, STR 26R/36R (SECTION 43 & 46), SKIN PANEL P/N 143T3521-5, P/N 146T3531-3. DURING MAINTENANCE INSPECTIONS AT IAI, EXISTING BLEND OUTS WERE FOUND ON THE R/H SIDE OF THE FUSELAGE. THE DAMAGE AREAS ARE CALLED AS M0239, M0240, M0241, M0247, M0248, M0249 AND M0250, AT (SECTION 43 & 46), FUSELAGE SKIN STA 474.5, STA 476, STA 615.5, STA 1346 AND STA 1373, STR 26R/36R. THE BLEND OUTS FALL ON RIVENTED AREAS AND THEY HAVE LESS THAN 2D AND/OR THE BLEND OUTS FALL WITHIN THE NO REPAIR ZONE BY A FUSELAGE SKIN CUTOUT AND THERFORE DO NOT MEET SRM ALLOWABLE DAMAGE REQUIREMENTS. THE DAMAGED AREAS WERE BEYOND LIMITS PER SRM 53-00-01, ALLOWABLE DAMAGE 1, FIGURE 101, DETAIL II AND/OR SRM 53-00-01, ALLOWABLE DAMAGE 1, FIGURE 202, SHEET 3. AN ULTRASONIC THICKNESS (UT) INSPECTION WAS ACCOMPLISHED, AND LESS THAN 10% OF MATERIAL WAS REMOVED AT ALL BLEND OUT LOCATIONS. THE SKINS ARE MADE FROM 0.160, 2024-T3 CLAD ALUMINUM MACHINED TO 0.056 MIN AND 0.210, 2024-T3 CLAD ALUMINUM CHEM-MILLED TO 0.056 MIN, THE EXISTING BLEND OUTS ARE COMMON TO DIFFERENT THICKNESS AREAS.