What happened
On the evening of September 30, 2001, a Cessna 152, registration F-GEFP, was conducting a local flight near La Flèche, France. An eyewitness observed the aircraft flying over the étang de la Roirie before entering a turn. The witness reported that the aircraft then assumed a very steep nose-down attitude, accompanied by a loud whistling sound from the engine, which continued until the aircraft struck the surface of the water. The impact resulted in the death of the pilot and the total destruction of the aircraft.
The investigation
The investigation focused on the wreckage recovered from the pond and the physiological state of the pilot. Examination of the flight controls revealed no mechanical failures. While the elevator trim was found in a full nose-down position, physical evidence on the control linkage suggested the trim was actually near neutral at the moment of impact. The wing structures showed symmetrical compression, indicating the aircraft struck the water in a nearly vertical trajectory.
Instrument analysis showed the airspeed indicator was stuck at 150 knots due to debris, and the magneto key was broken in the left position. The engine's throttle and mixture controls were both in the forward position. Crucially, the investigation confirmed that the propeller remained attached to the engine during flight. Toxicological analysis of the pilot's blood revealed the presence of an anti-depressant at therapeutic levels, a tranquilizer at sub-therapeutic levels, and an alcohol level of 0.33 g/L. It was noted that the pilot had not disclosed the use of these medications during his medical examination, which had taken place less than three months prior.
Findings
- The aircraft remained under control until the moment of impact, with no evidence of mechanical or technical failure.
- The symmetrical damage to the wings and the witness testimony confirm a steep, vertical descent into the water.
- The intentional action of the pilot led to the fatal dive.
- The pilot's medical fitness was compromised by the undisclosed use of medication and the presence of alcohol in his system.