Incident Overview
A pilot reported that during the takeoff roll from a grass area positioned between the runway and the taxiway, a rock was dislodged by the aircraft's large bush wheels. The rock impacted the left horizontal stabilizer, resulting in substantial damage. In response, the pilot aborted the takeoff.
Pilot Report
According to the pilot, no preimpact mechanical malfunctions or failures were present that would have prevented normal operation. The aircraft was otherwise functioning as expected prior to the event.
Damage Assessment
The impact caused substantial damage to the left horizontal stabilizer. The specific extent of the damage was not detailed beyond the classification as substantial.
Operational Context
The aircraft was equipped with large bush wheels, which are designed for operations on rough or soft surfaces. During the takeoff roll on the grass area, these wheels likely kicked up the rock that struck the stabilizer.
Conclusion
The incident highlights a potential hazard associated with operating aircraft equipped with large wheels on unpaved surfaces, where debris can be thrown into the air and impact airframe components.