What happened
Following takeoff, the pilot observed oil deposits on the aircraft's windscreen. In response to this mechanical indication, the pilot initiated a return to the airport for landing. During the landing roll, a gust of wind pushed the aircraft off the runway to the left. The plane ground looped, sheared the left main gear, nosed over, and came to rest inverted. The vertical stabilizer, tail section, and both wings were damaged.
The investigation
The investigation focused on the mechanical failure that prompted the return and the subsequent loss of control during rollout. Examination revealed that oil had leaked onto the windscreen, likely indicating an engine issue such as a seal failure or overfilling. During the landing roll, environmental factors played a critical role in the accident sequence. A gust of wind acted on the aircraft while it was still partially on the runway surface, pushing it laterally to the left.
Findings
The primary causal factor was the loss of directional control during the landing roll due to the gust of wind. The lateral force pushed the aircraft off the paved surface, leading to a ground loop. This maneuver resulted in the shearing of the left main landing gear and the subsequent nosing over of the aircraft. The initial oil on the windscreen was a contributing factor that necessitated the return, but the gust was the direct cause of the inversion and structural damage.
Safety message
Pilots should be aware that even minor mechanical indications, such as oil on the windscreen, can require immediate attention and may lead to complex decision-making scenarios. Additionally, during landing rolls, especially in crosswind or gusty conditions, maintaining directional control is critical to preventing runway excursions and subsequent accidents.