What was found
INSPECTION TYPE C-CK, FRAME AT FS 870 LOWER LT SKIN PANEL HAS CORROSION AT RB ATTACHMENT. REMOVED DAMAGED SECTION OF FRAME, FORMED FRAME AND SPLICE IAW REO 0530 1 AND DC8 SRM 51-1-4. HEAT TREATED FRAME AND SPLICE, REMOVED INTERCOSTAL TO ALLOW ACCESS. FAB FRAME AND SPLICE IAW REO 05301. REINSTALLED INTERCOSTAL IAW DC8 SRM 51-1-20D. FAB -59 ANGLE IAW REO 05301. ALODINED AND PRIMED IAW 51-1-8. INSTALLED IAW DC8 SRM 51-1-20D.