Factual Information
On 13 September 2011, at 18:25 local time, a Reims Aviation F152, registration HB-CFW, operated by Flugschule Eichenberger AG, was involved in an accident at Buttwil airfield (LSZU). The aircraft was conducting a solo training flight under visual flight rules. The pilot, a Swiss citizen born in 1968, held a student pilot certificate first issued on 11 June 2010 and a valid Class 2 medical certificate with a requirement to wear corrective lenses. He had logged 2 hours and 39 minutes of pilot-in-command time and 41 hours and 15 minutes of dual instruction, all on the accident aircraft type.
Narrative
The flight began at 17:31 LT with a briefing from the flight instructor. The assigned tasks included left and right traffic patterns and power-idle approaches. The student performed two left patterns and one right pattern, followed by two power-idle approaches, initially conducting touch-and-go landings. After one landing felt long, he executed a full-stop landing. He then decided to fly an additional left pattern.
During the approach for landing on runway 34, the student reported a normal approach with 60 knots indicated airspeed and 30° flaps over the forest edge. After touchdown, he set carburetor heat to cold, retracted flaps to 10°, and applied full throttle. Attempting to lift the nose, the aircraft did not become airborne. At the decision point near the hangar end, he aborted the takeoff, reduced power to idle, and applied brakes. The aircraft veered left; he attempted to correct with right brake. The aircraft departed the left side of the grass runway approximately 120 meters before the end, struck a tree with its left wingtip, pivoted left, nosed up, and came to rest on the nose wheel, right wingtip, and propeller. The pilot smelled fuel, was uninjured, evacuated the aircraft unassisted, and walked to the flight school office.
Meteorological Information
At the time of the accident, the weather at Buttwil was reported as: wind from 190° at 2-5 knots (a tailwind component for runway 34), few stratocumulus clouds at 6600 feet above mean sea level, visibility greater than 10 km, temperature 22°C, dewpoint 14°C, and QNH 1017 hPa. The general synoptic situation featured a weakening ridge from the Azores high and an approaching cold front. Local conditions included light winds and turbulence over forest areas.
Damage and Injuries
The aircraft sustained substantial damage. Minor ground damage occurred due to spilled fuel. The pilot, the sole occupant, was not injured.
Cause
The accident is due to a loss of control after the interruption of a touch-and-go maneuver which led to a collision with an obstacle.