Anderson Aircraft Corp. RANS S-12 accident near Bowmont, Idaho, July 17, 1999
On July 17, 1999 at about 8:00 pm local time, a Anderson Aircraft Corp. RANS S-12, an amateur-built aircraft,, registered N9230X, was destroyed in an accident near Bowmont, Idaho. It was a personal flight under general aviation rules (Part 91). 2 people were killed. The weather was visual conditions (good weather).
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The NTSB's probable cause their words, unchanged
Aircraft control was not maintained while maneuvering at low altitude. An inadvertent stall was a factor.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 17, 1999 · about 8:00 pm local time
- Place
- Bowmont, Idaho · map
- Type
- Accident
- Injuries
- 2 people were killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Anderson Aircraft Corp. RANS S-12, amateur-built
- Registration
- N9230X · registry record · serial 397
- Damage
- Destroyed
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
Several witnesses observed the airplane flying above the tree line, when the nose suddenly dropped and the airplane descended in a near-vertical attitude to the ground. One witness observed the airplane performing 'S' turns over a road just before he heard the sound of the collision. Other witnesses heard the engine operating at 'full throttle' or 'wound-up' as the aircraft was descending. During the post-crash inspection of the wreckage, no evidence of a mechanical failure or malfunction was found.
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: private
- Ratings: single-engine land
- Flight time: 129 hours in all; 94 in this make and model; 108 as pilot in command
- Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
- Seat: rgt
The aircraft
- Airframe total time: 400 hours
- Last inspection: annual inspection, May 2, 1998
- Maximum gross weight: 960 lb
- Seats: 2
- Landing gear: fixed
- Engine: Bombardier ROTAX 582 (piston); 0 hours total
- Fire on the ground
The flight
- Departed from: S67 Nampa ID at 7:30 pm
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: at 3 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 82°F (28°C), dew point 37°F (3°C)
- Altimeter: 29.00 inHg
- Observation at 7:56 pm from BOI, 15 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 1 |
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The docket at the NTSB holds the report as a PDF and the investigation's photographs and documents. This site never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number SEA99LA120.