Boland/Poe TSUNAMI NX39JR
25 September 1991 · Pierre, South Dakota, United States · Fatal
Summary
On 25 September 1991 at about 18:30 local time, a Boland/Poe TSUNAMI registered NX39JR, operated by John Richard Sandberg, was involved in an accident near Pierre, South Dakota, United States. One person was on board and one died. The aircraft was destroyed. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 18:30
- Classification
- Accident
- Location
- Pierre, South Dakota, United States
- Nearest airport
- Pierre Municipal (PIR)
- Coordinates
- 44.3701, -100.3199
- Aircraft
- Boland/Poe TSUNAMI
- Registration
- NX39JR
- Category
- Airplane
- Engines
- 1
- Operator
- John Richard Sandberg
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Personal
- Phase of flight
- Not recorded
- Route
- Casper → Unknown
- Aircraft damage
- Destroyed
- Weather
- VMC
- Light
- Day
- NTSB number
- CHI91DTK04
People
1 person died.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 1 | 0 | 0 | 0 |
Probable cause
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.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
THE ACCIDENT AIRPLANE WAS OBSERVED TO SUDDENLY ROLL INVERTED DURING FINAL APPROACH AND DESCEND INTO THE GROUND. INVESTIGATION OF THE WRECKAGE SHOWED A BENDING OVERLOAD FAILURE OF THE EXTERNAL THREADED STEM TYPE ROD END BEARING ATTACHED TO THE PISTON OF EACH WING FLAP HYDRAULIC ACTUATOR. THE EXPERIMENTAL RACING AIRPLANE WAS ORIGINALLY BUILT AND FLOWN WITHOUT WING FLAPS. THE WING FLAPS WERE ADDED BY THE PILOT/OPERATOR AT A LATER DATE.
Quoted verbatim from the NTSB record.
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 24 Apr 1991 | Cessna 170A | Newell, South Dakota, United States | Black Hills Aviation, Inc. | No injuries | - |
| 27 Jun 1991 | Piper PA-28-140 | Vermillion, South Dakota, United States | Kenneth A. Korn | Minor injuries | - |
| 4 Jul 1991 | Champion 7KCAB | Hill City, South Dakota, United States | Bruce Anspaugh | Minor injuries | - |
| 5 Jul 1991 | Cessna 150F | Faulkton, South Dakota, United States | Hass, Larry J. and Bower, Gary | Fatal | 2 |
| 1 Aug 1991 | Piper PA-38 | Bridgewater, South Dakota, United States | Paweltzki, Jerry | No injuries | - |
| 26 May 1991 | Piper PA-18-125 | Newell, South Dakota, United States | Orwick Ranch | Fatal | 2 |