Incident Sequence
After performing an engine run-up with the parking brake set, the pilot initiated a takeoff. During the first attempt, the aircraft failed to accelerate satisfactorily, prompting an abort. The brakes operated normally during this abort, and a subsequent engine run-up revealed no unusual indications. While taxiing back to the approach end of the runway, the pilot noticed a lack of right braking action. He asked the passenger in the right front seat to check the right set of brakes, after which he determined the brakes were acceptable.
On the second takeoff attempt, the pilot again felt unsatisfactory acceleration and decided to abort. However, this time he reported that no braking action was available. To slow the aircraft, the pilot employed aerodynamic braking and fishtailing maneuvers. Despite these efforts, the aircraft ran into a snowbank at the departure end of the runway.
Brake Examination
An examination of the brakes conducted after the incident revealed only evidence of excessive heat. No other anomalies were documented.
Maintenance Findings
Local maintenance personnel reported that the parking brake release trigger must be held in the depressed position while moving the brake handle forward to prevent inadvertent braking. This operational detail was noted in relation to the incident.