NTSB Identification: SEA03FA015.
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Accident occurred Saturday, November 30, 2002 in Bryant, WA
Probable Cause Approval Date: 11/25/2003
Aircraft: Caron Seawind, registration: N313FC
Injuries: 2 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

The 1,570 hour pilot/builder, along with a 9,000 hour commercial pilot (who had 150 hours experience in the make/model), departed in the homebuilt Seawind 3000 amphibious aircraft on a test flight after a little more than 12 hours of test flying. After approximately 30 minutes witnesses observed the aircraft go from a climb into a descending spiral. One witness reported that he heard the engine quit while others described varying engine sounds characteristic of decaying or intermittent power. One witness observed the aircraft's wings rocking about the longitudinal axis and 3/4 through the third spiral the nose dropped. The aircraft impacted the ground in a near vertical attitude with minimal evidence of horizontal motion through the heavily wooded terrain of the crash site. A post-crash fire consumed most of the aircraft. On site examination found no evidence of mechanical malfunction with the aircraft's controls and an engine disassembly and examination revealed the same findings for the powerplant. Propeller slash marks along the side of one of the trees at the ground impact site suggested a minimum of 1000 RPM an instant before ground impact. The center of gravity was estimated to be within limits at the time of the accident and the stall speed of the aircraft was reported as 64 knots (clean).

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

A loss of engine power for undetermined reasons and the failure of the flying pilot to maintain flying speed resulting in an inadvertent stall, loss of control and subsequent collision with terrain.

Full narrative available

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