What happened
On 12 May 2019, a BRM AERO Bristell NG5, registration G-CLDO, was conducting a cross-country flight from Les Mureaux to Limoges. Due to deteriorating weather conditions at the intended destination, the pilot decided to divert to the Montmor0illon microlight strip.
Upon arriving at the airfield, the pilot entered a left-hand circuit for runway 35. While on final approach, the pilot flared the aircraft over the runway threshold and subsequently applied full power to abort the landing. During this sudden application of power, the pilot lost control of the aircraft, which collided with the ground on the left side of the runway. The impact resulted in the aeroplane destroyed and the pilot seriously injured.
The investigation
The investigation utilized data from the aircraft's Dynon computer and the pilot's testimony. Investigators examined the wreckage and found no technical anomalies or mechanical failures. The engine control levers were found in the maximum forward position, and the flaps were in the landing configuration.
Regarding the airfield, investigators noted that while the Montmorillon strip was officially reserved for microlights, the pilot had used it previously during training. It was also established that the usable length of the grass runway had been reduced to 440 meters due to unmaintained sections, and the pilot had not contacted the local microlight school director to receive updated safety information regarding the strip's current dimensions or the risk of downdrafts on runway 35.
Findings
- The primary cause of the accident was the sudden re-application of power during the landing phase, which led to a loss of control.
- The loss of control was likely exacerbated by engine-induced effects, such as spiraling slipstream and propeller torque, combined with a right crosswind and probable gusts.
- The pilot's decision to abort the landing was made for reasons that could not be determined by the investigation.