Accident Details
The airplane sustained substantial damage during a takeoff from runway 30, a concrete surface measuring 3,801 feet by 75 feet. According to the pilot's report, he advanced the speed levers fully forward, held the brakes with rudder pedals neutral, then increased power levers to approximately 80% torque before releasing the brakes. He engaged the nosewheel steering power lever button during the initial roll and the airplane accelerated near the centerline.
At about 50 knots, the pilot released the nosewheel steering button, and the aircraft began to veer to the right. He reengaged the button and applied rudder, but the airplane continued to deviate and departed the runway. The pilot initiated abort procedures, but the airplane could not stop on the concrete surface. It struck a runway light, and the nose gear collapsed in the soft dirt beyond the runway edge.
On-Site Evidence
Investigation revealed the airplane veered off the right side of the runway approximately 720 feet from the start of the takeoff roll. Tire skid marks about 50 feet in length were observed where the airplane left the runway. The left skid mark was measured at nine feet right of the runway centerline, and the marks exited the runway at about a 30- to 35-degree angle. The nosewheel steering system could not be functionally checked due to impact damage.
Pre-Takeoff Procedures
The Pre-takeoff Checklist includes a Steering and Alignment check to verify the operational status of the nosewheel steering system prior to takeoff. According to the checklist, the nosewheel steering should not be used if the airplane fails this check. The Swearingen Metro SA226-T Airplane Flight Manual states that if a malfunction occurs in the nosewheel steering mechanism, adequate steering "can be maintained by use of rudder, brakes, and/or differential power."
Inspection Findings
An inspection of the airplane found no anomalies that could be associated with a pre-impact condition.