NTSB Factual Report

The pilot stated that he was holding short of a runway intersection for further clearance from ground control. After receiving clearance to cross the runway, the pilot mistakenly turned left onto a grassy area. The right wing impacted a sign, resulting in substantial damage to the aileron and wing flap. The pilot stated that there were no mechanical malfunctions or anomalies with the airplane.

NTSB Probable Cause

The pilot's wrong turn while taxiing resulting in a collision with a sign.