Wag-Aero, Inc. SUPER CUBY accident near Roscoe, South Dakota, July 19, 1991
On July 19, 1991 at about 11:45 pm local time, a Wag-Aero, Inc. SUPER CUBY, an amateur-built aircraft,, registered N336DT, was destroyed in an accident near Roscoe, South Dakota. It was a personal flight under general aviation rules (Part 91). 1 person was killed. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
THE PILOT'S INADVERTENT STALL AND INADEQUATE REMEDIAL ACTION. ASSOCIATED FACTORS ARE THE PILOT'S LACK OF RECENT TOTAL EXPERIENCE AND INADEQUATE PREFLIGHT PLANNING/PREPARATION.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 19, 1991 · about 11:45 pm local time
- Place
- Roscoe, South Dakota · map
- Type
- Accident
- Injuries
- 1 person was killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Wag-Aero, Inc. SUPER CUBY, amateur-built
- Registration
- N336DT · no longer on the register · serial 13662465
- Damage
- Destroyed
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
A WITNESS TO THE ACCIDENT OBSERVED THE ACCIDENT AIRPLANE FLYING ABOUT 100' AGL. HE LOOKED AWAY BUT RETURNED HIS GAZE TO THE AIRPLANE WHEN HE HEARD THE ENGINE STOP. HE OBSERVED THE AIRPLANE PITCH 'STRAIGHT DOWN WITH ITS WINGS LEVEL' AND DESCEND INTO THE GROUND. THE AIRPLANE WAS SERVICED JUST BEFORE THE FLIGHT WITH 12.6 GALLONS OF FUEL ADDED TO THE EMPTY LEFT TANK. APPROXIMATELY 1.5 TO 2 GALLONS WAS OBSERVED IN THE RIGHT TANK JUST PRIOR TO THE FLIGHT.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
Pilot
- Certificate: student
- Flight time: 170 hours in all; 15 in this make and model
- Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
- Seat: frt
The aircraft
- Last inspection: inspection type not recorded, January 2, 2000
- Maximum gross weight: 1,500 lb
- Seats: 2
- Landing gear: fixed
- Engine: Lycoming O-290-GPU (piston); 0 hours total
- Fire on the ground
The flight
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 150° at 9 knots
- Visibility: 10 statute miles
- Sky: scat at 25,000 ft
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
- Observation at 11:50 pm from ABR, 45 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.