What happened
On 21 February 2021, an Ekolot KR-030 Topaz microlight, registration 70HZ, was performing a local flight from the Saint-Florentin - Chéu aerodrome in France. During the initial climb, the pilot experienced engine sputtering and a loss of full power. In an attempt to return to the runway, the pilot executed a low-altitude aerodrome circuit.
While maneuvering above the aerodrome hangars, the pilot increased the bank angle to align with the runway centerline. During this steep turn, the aircraft encountered a tailwind component, which reduced the margin above the stall speed. The pilot was unable to level the wings before the microleght collided with the ground on runway 07C. The accident resulted in one fatality (the pilot) and one injury (the passenger).
The investigation
The BEA examined the wreckage, which was found upside down. The investigation confirmed that the engine control linkages were intact and that the fuel and oil systems were functional. However, investigators discovered that two connectors on the ignition circuit were disconnected due to broken locking studs on a non-genuine electronic ignition unit. This damage was determined to have occurred prior to the accident.
Findings
- The primary cause of the engine power fluctuations was likely the disconnection of an electronic ignition unit.
- The pilot's decision to perform a very short circuit at a low altitude, combined with an excessive bank angle, led to a loss of control.
- The presence of a tailwind during the turn further degraded the aircraft's performance and increased the risk of a stall.