Incident Details
An experimental test flight involving a turbine-powered aircraft included intentional spin maneuvers as part of the test plan. During the flight, a planned one-turn spin unexpectedly developed into a flat spin, a more severe and difficult-to-recover condition.
Sequence of Events
The pilot attempted recovery procedures, but they proved ineffective. In accordance with the test plan, the pilot then attempted to deploy the anti-spin parachute, a safety device designed to assist in recovery from such situations. However, despite repeated efforts, the parachute failed to open.
As the aircraft continued descending out of control, the pilot made the decision to abandon the aircraft. At approximately 7,000 feet altitude, the pilot successfully egressed from the aircraft and deployed his own parachute, descending safely to the ground.
Outcome
The pilot landed without injury, and the aircraft was presumably lost, though the source does not specify the condition of the aircraft after the pilot's departure. The experimental test flight was cut short due to the failure of the anti-spin parachute system and the inability to recover from the flat spin.