The left wing front spar lower spar cap had a transverse fracture about 5 inches outboard of left WS 34. This area had not been repaired and did not have adjacent structural element failures. A portion of the horizontal flange of the spar cap had fatigue features that emanated from a hole for a threaded fastener to attach a wing leading edge panel. The aft portion of the fatigue region contained multiple relatively rough regions, which was indicative of an overstress fracture that was progressing fairly rapidly. These fracture regions were interspersed between regions with crack arrest positions.