A Convair CV-580 cargo plane, N171FL, sustained substantial damage in a landing accident at Guatemala City-La Aurora Airport (GUA), Guatemala. Flight TSU8138 had landed on runway 19 when the nosegear folded backwards. The propellers contacted the runway, causing the left hand prop to separate. Debris sliced through the fuselage of the CV-580. PROBABLE CAUSES: (translated from Spanish) The aircraft performed its approach at a higher speed than that established in the Flight Manual procedures, verified by reading indicated in the CVR. The pilot and the first officer communicated about it and did not reduce or try to reduce the approach speed too late and at the time of landing and touchdown on the runway it was very fast, causing several bounces of the nose landing gear on the runway, in addition to bouncing with the main gear. Taking into account the operational deficiencies of the crew in the cockpit, this accident is considered to be of the operational type.