The airplane departed the taxiway and collided with terrain while taxiing from landing. After taxiing off the runway, the controller cleared the pilot to taxi to the ramp area. He was unfamiliar with the airport and requested further instructions. In an effort to comply with what he thought the controller was telling him to do, he departed the taxiway. He continued down a grassy area and collided with a median. The pilot reported no preimpact mechanical malfunctions or failures with the airplane.
The National Transportation Safety Board determines the probable cause(s) of this accident as follows:the pilot's inadequate visual lookout, which resulted in his failure to maintain proper alignment with the taxiway. Factors in the accident were the dusk lighting conditions and pilot not understanding the ground control taxi clearance.