Incident Overview
A pilot flying a tailwheel-equipped airplane encountered developing weather to the west while en route to the intended destination and decided to divert to a nearby airport. The pilot reported that the approach and landing were normal, but after touchdown, a wind gust pushed the airplane off the runway surface. The left wing subsequently struck a runway distance remaining sign.
Post-Accident Examination
An FAA inspector examined the airplane after the accident and found that the wing spar had sustained substantial damage. No evidence of any preimpact malfunctions or failures of the airplane or its engine was discovered.
Weather Data Review
A review of automated weather observing system (AWOS) data from the diversion airport indicated that the peak wind speed never exceeded 6 knots, and no wind gusts were recorded before, during, or after the time of the accident.
Pilot Experience
According to the Pilot/Operator Aircraft Accident/Incident Report (NTSB Form 6120.1), the pilot had accumulated only 10.5 hours of flight experience in the accident airplane make and model.