| Crash location | Unknown |
| Nearest city | Pierre, SD
44.368316°N, 100.350966°W |
| Tail number | NX39JR |
|---|---|
| Accident date | 25 Sep 1991 |
| Aircraft type | BOLAND/POE Tsunami |
| Additional details: | None |
A BENDING OVERLOAD FAILURE OF THE WING FLAP CONTROL RODS AND REMEDIAL ACTION BY THE PILOT WAS NOT POSSIBLE. FACTORS IN THE ACCIDENT ARE THE INADEQUATE DESIGN OF THE WING FLAP SYSTEM BY THE PILOT/OPERATOR MANUFACTURER AND HIS LACK OF TOTAL EXPERIENCE IN TYPE OF AIRCRAFT.