What was found
DURING ROUTINE C CHECK INSPECTION, FOUND MAIN CARGO COMPARTMENT FRAME FLANGE CRACKED AT STATION 1580.000 LONGERON 20 LEFT TO LONGERON 21 LEFT. REMOVED DAMAGED SEGMENT OF FRAME. FABRICATED SEGMENT OF FRAME, ANGLES. PERFORMED HEAT TREATMENT TO REPAIR PARTS. CLEANED, TREATED AND PRIMED AREA AND REPAIR PARTS. INSTALLED REPAIR PARTS IAW SRM 53-2-0 FIGURE 2 SHEETS 1, 4 AND 6, SRM 53-4-1 FIGURE 51 ITEM "A", 53-2-0 FIGURE 2 SHEET 7, 8 TR NUMBER 53-110 DATED 11-10-00, 53-2-0 FIGURE 2 SHEET 5 TR NUMBER 53-125 DATED 08-31-01, SRM 51-1-1 PAGES 1, 13 AND 17, SRM 51-1-8B, SRM 51-1-20, AND 51-3-1.