Piper PA-31 Cheyenne

The twin engine aircraft departed Tel Aviv on a flight to Toussus-le-Noble with an intermediate stop in Corfu, carrying two passengers and one pilot. On approach at 3,000 feet, the aircraft' speed and height dropped. It entered an uncontrolled descent and crashed in a wooded area located in Dampierre-en-Yvelines, about 10 km from the runway 07L threshold. All three occupants were killed.

A Piper PA-31T "Cheyenne" and a Cessna 172P "Skyhawk" collided in midair during cruise flight at dusk and in visual meteorological conditions. The Cheyenne departed under visual flight rules (VFR) from a local airport northwest of Denver, and was proceeding direct at 7,800 feet to another local airport south of Denver. Radar indicated its ground speed was 230 knots. Its altitude encoder was transmitting intermittently. The Skyhawk departed VFR from the south airport and was en route to Cheyenne, Wyoming, at 7,300 feet. The pilot requested and was cleared to climb to 8,500 feet and penetrate class B airspace. Radar indicated its ground speed was 110 knots. The Skyhawk was flying in the suggested "VFR flyway"; the Cheyenne was not. When the controller observed the two airplanes converging, he asked the pilot of the Cheyenne for his altitude. He replied he was at 7,600 feet. The controller immediately issued a traffic advisory, but the pilot did not acknowledge. Both airplanes departed controlled flight: the Skyhawk struck a house, and the Cheyenne fell inverted into the backyard of a residence. Wreckage was scattered over a 24 square block area in west Denver. At the time of the accident, the controller was handling low altitude en route, arrival and departure traffic for both airports. Wreckage examination disclosed four slashes, consistent with propeller strikes, on top of the Cheyenne's right engine nacelle, the cabin above the right wing trailing edge, the empennage at the root of the dorsal fin, and at the tail cone. The Cheyenne was on a similar flight three days before the collision when the pilot was informed by air traffic control that the transponder was operating intermittently. According to recorded radar and voice communications from that flight, the transponder/encoder operated intermittently and the pilot was so advised. Examination of the Cheyenne's altimeter/encoder revealed a cold solder connection on pin 8 of the 15-pin altimeter connector. When the wire was resoldered to the pin, the information from the altimeters, encoder, and altitude serializer was normal.

The pilot of the twin turbo-prop airplane lost control of the aircraft during the initial takeoff climb phase while in instrument meteorological conditions. An instrument flight rules flight plan was filed for the planned 169-nautical mile cross-country flight. The aircraft impacted terrain approximately 1.7 miles northwest of the departure airport. The 2,893-hour instrument rated private pilot, who had accumulated over 765 flight hours in the same make and model, had been cleared to his destination "as filed," and told to maintain 7,000 feet, and to expect 17,000 feet in 10 minutes. After becoming airborne, the flight was cleared for a left turn. The tower controller then cleared the flight to contact air route traffic control center. The pilot did not acknowledge the frequency change; however, he did establish radio contact with center on 133.1, and reported "climbing through 4,900 feet for assigned 7,000." The weather reported at the time of flight was winds from 010 degrees at 15 knots with 700 feet overcast and 3 miles visibility in mist. The radar controller observed the aircraft climbing through 5,500 feet and subsequently observed the airplane starting a descent. No distress calls were received from the flight. Signatures at the initial point of impact were consistent with a nose-low ground impact in a slight right bank. A post-impact fire consumed the airplane. No discrepancies or anomalies were found at the accident site that could have prevented normal operation of the airplane.

Crashed upon takeoff for unknown reasons. There were no casualties.