What was found
WHILE PERFORMING THE MODIFICATION S/B 53-72; SHEAR WEB AND PRESSURE PANEL ATTACHED ANGLES, FOUND RT O/B PANEL ASSY FRAME/MATING SURFACE HAS 4 SMALL CRACKS AT ALL RADIUS CORNERS. DYE CHECK HAS BEEN COMPLIED WITH FS 848.719 RT SIDE. BLENDED OUT CRACKS AT UPPER CORNERS LOWER CRACKS FINISHED IN EXISTING HOLES DO NOT REQUIRE PARTS PER DWG MMC 085310-4. INSTALLED REPAIR DOUBLER IAW DWG MMC085310-4 AND SRM 51-1-21.