Aircraft accident report project 12 on scene

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Aircraft Accident Report Project1.2 On-Scene observations Accident Case Number ERAU-330RL
ZONK AIR ACCIDENT 4During the on-scene observations, the aircraft traveled at 75 degrees and 412 feet after encountering the top of a 100-foot communication tower, thereafter airborne-downward to the first ground impact 400 feet from the base of the tower. It was determined that the left-wing struck the ground first due to the red wing light at that first ground impact area. The right wing contacted the ground 500 feet from the base of tower. The rest of the wreckage was twisted up, partially burned, and crushed into consolidated area 50 feet from the last ground strike.The crushed portions of fuselage and wing roots had vertical soot marks and there were slipstream soot marks running along the side of the right engine nacelle, aft towards the remains of the right horizontal stabilizer, which had tiny emery light droplets of metal and soot. There was no such detail noted on the remains of the left horizontal stabilizer. The engines were mangled. The right prop, however, showed span and chord wise striations with numerous classic "S" compressions on the trailing edges, as well as, the blade tips jagged, broken and pieces missing. Fire and impact made inspection of other components nearly impossible. NOTE: Follow-up lab tear downs were made difficult by the burn and impact damage. However, the expert inspections revealed the right engine was developing some power at time of impact, however, the left engine showed no evidence of significant power via signatures from gear, cooled metal exhaust ducting, and analysis to the props. It was noted on theleft engine that the fuel line support bracket appeared to have some propagation cracks along the bolt holes that connected to the firewall, but it had not separated from the firewall bracket and the fuel line showed no cracks or breech of integrity. The left engine nacelle showed evidence of Aircraft Accident Report Project1.2 On-Scene observations Accident Case Number ERAU-330RL
ZONK AIR ACCIDENT 5some vertical dark residue marks or soot trails. The engine was severely damaged by impact and burned. The left prop was intact; the tips were bent aft, and the blades showed little sign of trailing edge compression. The left propeller remained attached to the left engine and investigators noted that the blades were secure in their grips, and the blade angles corresponded to a feathered position relative to normal direction of flight. The cockpit and passenger areas were crushed and destroyed, mostly beyond recognition.The seats were broken and twisted. Evidence showed this incident was a nonsurvivable accident. Rescue crews had removed the bodies, by cutting the restraint systems which were still in place. The Placer county coroner retained control of the bodies and had indicated massive blunt trauma as the cause of death for all occupants. They also reported that the toxicology reports on the pilot were negative.

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