What happened
On June 3, 2017, a Z 226 T aircraft, registration OK-MGF, was involved in an accident at Slaný Airport (LKSN) during a training flight. The pilot, who was undergoing type conversion training, successfully completed the approach and touchdown on runway 07L. However, during the landing roll, the aircraft experienced significant lateral oscillations, causing it to tilt and travel on a single main landing gear wheel.
Unable to stabilize the aircraft, the pilot decided to execute a go-around. Upon applying power, the aircraft experienced a sudden and sharp rightward veer. The pilot failed to sufficiently use the rudder to counteract the torque effect and did not reduce power in time to stop the movement. Consequently, the aircraft veered off the runway and came to a halt in a nearby field of sugar beets. The pilot sustained no injuries, but the aircraft suffered substantial damage, including a bent propeller, engine cowling deformation, and damage to the landing gear and left wing structure.
The investigation
The ÚZPLN investigation focused on the sequence of events following the initial touchdown and the pilot's subsequent actions. The investigators examined the pilot's qualifications, noting that while the pilot was medically fit and properly licensed, they had limited experience on the Z 226 T, having flown only approximately 7 hours on this specific type. The investigation also included a technical inspection of the aircraft, which found no evidence of mechanical failure prior to the impact with the vegetation.
Findings
- The pilot's decision to repeat the circuit was prompted by the inability to correct the lateral oscillations during the landing roll.
- The primary cause of the accident was pilot error during the go-around, specifically the failure to maintain directional control following a sudden application of power.
- The sudden increase in engine power induced a significant yawing motion that the pilot was unable to counteract with the rudder.
- The pilot failed to stop the aircraft within the operational area of the aerodrome.