Event Description
A flight instructor was providing tailwheel instruction to a pilot. After a three-point landing, the pilot receiving instruction raised the tail to initiate a go-around. During this maneuver, the wind shifted from a left quartering headwind to a left quartering tailwind. The airplane began to veer left. The pilot added right rudder and aileron to correct the deviation, but the airplane continued to veer left and subsequently exited the runway. It encountered tall grass and very rough terrain. The instructor then took control of the flight controls and aborted the go-around. As a result, the left wing and elevator impacted the far side of a trench.
Damage
The airplane sustained substantial damage to the left wing and elevator.
Mechanical Condition
The flight instructor reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.
Weather Information
The automated weather observation station located on the airport reported that, approximately five minutes before the accident, the wind was from 240° at 3 knots. The same automated station reported that approximately 35 minutes after the accident, the wind was calm. The flight instructor had landed the airplane on runway 15.