The crash of an EMB-120 operated by a commuter carrier created concerns about communication between employees on one shift and communication between shifts. As the aircraft passed through 11,500 feet, it was observed to break up in the air and disappeared from the radar screen. The structural breakup and loss of 14 lives was attributed to the loss of the left horizontal leading edge in flight. But what caused this loss? The answer became obvious: 47 screws were missing which should have secured the top of the left horizontal leading edge.