What was found
DURING ROUTINE C CHECK INSPECTION, FOUND AFT FUSELAGE LONGERON CRACKED AT STATION 1786.000 LONGERON 17 LEFT. REMOVED CRACKED LONGERON. CLEANED, TREATED, AND PRIMED AREA. FABRICATED EXTRUSION LONGERON. INSTALLED REPAIR PART IAW SRM 53-5-3 FIGURE 5 SHEET 1 ITEM "B", SRM 53-1-0 PAGE 1, SRM 51-1-20D, SRM 51-1-21, SRM 51-1-8B, SRM 51-2-0 FIGURE 50 SHEET 37, SRM 51-1-11, AND SRM 51-3-1.