What happened
The pilot was operating a tailwheel-equipped aircraft fitted with tundra tires when the incident occurred during the landing phase. The aircraft touched down on a dry, hard-faced runway surface. During the rollout, the pilot lost directional control, resulting in a ground loop event. No mechanical failures or anomalies were identified prior to the occurrence.
The investigation
Following the accident, a thorough post-accident inspection of the airframe and systems was conducted. The examination revealed no pre-existing mechanical defects or malfunctions that could have contributed to the loss of control. The structural integrity of the landing gear and control surfaces appeared consistent with normal operation prior to the ground loop.
Findings
The primary factor in this incident was the handling characteristics of the specific tire configuration on the runway surface. Tundra tires are designed for soft terrain but can present increased ground control difficulties when operated on hard-surfaced runways. The pilot faced significant challenges maintaining directional stability due to the reduced traction and altered steering response inherent to tundra tires on hard pavement. This aligns with FAA advisory circulars which note the specific handling nuances of such equipment in these conditions.
Safety message
Pilots operating tailwheel aircraft equipped with tundra tires should be aware of the increased difficulty in maintaining ground control on hard-surfaced runways. Proper technique and awareness of the reduced traction characteristics are essential to prevent ground loops during landing operations.