Incident Details
A pilot was landing a private aircraft on a grass airstrip. The airstrip was approximately 1,900 feet long with an uphill gradient. Trees with heights of about 50 to 60 feet were present along portions of the runway alignment. The pilot reported that wind conditions were light and variable. The final approach was conducted at 70 knots with full flaps extended.
Landing and Maneuver
During the landing flare, the pilot experienced a gust of wind coming from the direction of the trees, which pitched the airplane upward and caused it to travel further down the runway. Because trees were present at the departure end, the pilot committed to landing. The airplane touched down approximately midfield on slick, mowed grass. When the brakes were applied, the airplane hydroplaned on the grass surface. The pilot attempted to execute a ground loop to avoid colliding with the trees, but the airplane slid sideways, and the left wing struck a tree approximately 10 inches in diameter.
Damage
The impact resulted in structural damage to the firewall, engine mounts, and left wing.