At about 13:30 Pacific time, a Cessna 172 was damaged during a touch-and-go landing at McMinnville Municipal Airport. The student pilot, the sole occupant, was not injured. The round robin cross-country flight originated at Troutdale, Ore., with intermediate stops at Corvallis, and McMinnville. During a touch-and-go landing at McMinnville, the aircrafts left wing struck the runway. The pilot was unaware of the contact and continued the flight to Troutdale, the final destination. The wing skin, spar and flight controls were all damaged.