Incident Sequence
After landing, the second pilot, occupying the left seat and at the controls, executed a left turn onto taxiway Charlie. Subsequently, another left turn was made onto taxiway Alfa, a 75-foot wide, down sloping asphalt taxiway. During these turns, the brakes appeared to function normally. The aircraft continued taxiing at a speed described as 'about a fast walk' toward the active runway for departure. Due to strong winds, the power was set to idle and light braking was applied.
As the second pilot initiated a left 90-degree turn to align with the runway hold short line, he commented that there were no brakes. The pilot then assumed control and attempted to depress his brake pedals, but no braking effect resulted. The airplane continued rolling, veering to the right and into a grass ditch approximately 20 feet from the taxiway.
Investigation Findings
Examination of the braking system revealed sufficient brake pedal travel and pressure on the left side brake pedals.