On September 8, 2003, a Piper PA-20 (registration N5595H) was involved in an aviation accident near Wausau, WI. Investigators recorded the probable cause as: The excessive free play resulting in a loose tail wheel assembly and a failure of the flight crew to maintain directional control during the landing rollout. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During the landing roll, the aircraft ground looped, resulting in substantial damage to the left wing tip and horizontal stabilizer. Post-accident investigation revealed excessive tail wheel free play.
Accident Description
The aircraft experienced a ground loop during the landing roll, resulting in substantial damage. The flight instructor reported that an uneventful three-point landing was performed. During the rollout, the aircraft began to drift toward the left. The dual student applied right rudder, and the aircraft responded. However, the aircraft continued to track to the right. Despite full left rudder being applied, the aircraft did not straighten out. When the aircraft reached the edge of the runway, it immediately ground looped to the right. The left wing tip and left horizontal stabilizer contacted the ground and were damaged.
Post-Accident Investigation
A post-accident investigation revealed that the tail wheel had approximately 3-1/2 inches of free play. Tail wheel control continuity was verified. No other anomalies were noted.