Accident Details
On March 15, 2021, at about 1030 mountain daylight time, a Cessna T210M airplane, registration N886KH, was substantially damaged in an accident near Leadore, Idaho. The pilot and passenger were not injured. The flight was operated as a personal flight under Title 14 Code of Federal Regulations Part 91.
Landing and Runway Conditions
The pilot reported a smooth and uneventful flight to Leadore Airport (U00). After arriving, the pilot circled the runway to assess wind direction and surface conditions. The airplane landed on runway 29, which is 3,500 ft long with a rough surface. About one-third down the runway at an airspeed of 80 knots, the pilot applied brake pressure but found the brakes ineffective. Needing more pressure, the airplane veered right, exited the runway near the departure end, crossed airport property, impacted a small berm, and came to rest near a building.
Examination of the runway revealed that the approach end had freshly mowed bunchgrass, while the remainder was deteriorated asphalt and gravel. The first identifiable contact marks, consistent with skidding tires, were found about 2,600 ft from the approach end, leaving about 900 ft of runway remaining. The skid marks continued off the runway through low sagebrush, over a small berm, through a barbed wire fence with metal poles, and ended near the main wreckage, which was located about 420 ft from the departure end.
Postaccident Examination
The main wreckage showed substantial damage to the horizontal stabilizers and elevators, and the left main landing gear had collapsed. The flaps were set to about 30°. The right main landing gear brake line near the wheel brake assembly was bent downward and separated from the caliper's B-nut fitting.
A postaccident examination of the brake system revealed that when activated, the brake pedals showed no pressure and some residual brake fluid. The separated hydraulic line on the right main landing gear had fracture surfaces consistent with an overstress fracture. No other anomalies were noted.
Performance Data
The Pilot's Operating Handbook provided landing distances for a dry, paved surface. Investigators calculated the airplane's landing performance based on ambient temperature, calm wind, zero runway slope, maximum weight, 6,000 ft elevation, and flaps at 30°. The estimated landing distance over a 50 ft obstacle was 1,710 ft, and the estimated ground roll was 905 ft.