On August 30, 1990, a Beech A23A (registration N8871M) operated by Black Sheep Flying Club was involved in an aviation accident near ST Paul, MN. Investigators recorded the probable cause as: IMPROPER PLANNING/DECISION BY THE PILOT, WHICH RESULTED IN FUEL EXHAUSTION, DUE TO AN INADEQUATE SUPPLY OF FUEL, AND FAILURE OF THE PILOT TO MAINTAIN ADEQUATE AIRSPEED, WHICH RESULTED IN AN INADVERTENT STALL/SPIN. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A pilot reported engine power loss about 1.5 hours after takeoff. A witness saw the aircraft's nose rise, right wing drop, and the aircraft spin into the Mississippi River. No preimpact mechanical failure was found; the fuel selector was on the right tank and both fuel gauges indicated empty.
Accident Summary
Approximately 1.5 hours after takeoff, the pilot reported a loss of engine power. When asked about her position, the pilot stated she was 'over the river.' A witness observed the aircraft at an estimated altitude of 500 to 800 feet above ground level. The witness reported that the aircraft's nose rose to a high angle, then the right wing dropped, and the aircraft entered a spin before diving into the Mississippi River.
Sequence of Events
No preimpact mechanical failure was found during the investigation. The aircraft had been flown on a previous flight for about 1.4 hours, using fuel from the right fuel tank. There was no record of the aircraft having been refueled after that flight.
Post-Accident Examination
During the post-accident examination, the fuel boost pump was found in the 'ON' position. Both fuel gauges were indicating empty, and the fuel selector was positioned to the right tank.