What happened
On Thursday, May 15, 1997, at 12:15, a Robin DR 315 aircraft, registered F-BRTP, was conducting an instructional flight near Quend, France. The flight, operated by a local flying club, involved an instructor and a student pilot. During the session, the crew was performing an engine failure drill, which included a simulated forced landing in a field.
Following a go-around maneuver performed at 300 feet above the ground, the aircraft initially climbed normally to an altitude of approximately 600 feet. At this point, the Lycoming O-235 C 2A engine experienced a loss of power accompanied by engine surges. The instructor took control of the aircraft and successfully executed an emergency landing in a nearby field. There were no injuries to the occupants and no damage to the aircraft.
The investigation
Following the incident, the club's mechanic performed a technical examination of the engine. The inspection focused on the fuel system and the carburetor components to determine the source of the power loss.
Findings
- The investigation established that the engine failure was caused by carburetor pollution.
- Specifically, deposits were discovered within the mixture control housing of the carburetor.
- The fuel used for the flight was identified as automotive unleaded gasoline (super).