Amateur-built S D S C accident near Kemmerer, Wyoming, July 7, 2017
On July 7, 2017 at about 5:00 pm local time, a 1996 amateur-built S D S C, registered N599JR, was substantially damaged in an accident during landing near Kemmerer, Wyoming (Kemmerer Muni airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 2 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The pilot’s improper landing flare, which resulted in a bounced landing, and his subsequent failure to maintain directional control during the landing roll.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 7, 2017 · about 5:00 pm local time
- Place
- Kemmerer, Wyoming · Kemmerer Muni · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built S D S C NO SERIES, built 1996
- Registration
- N599JR · registry record · serial 001
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The pilot of a tailwheel-equipped airplane reported that, during landing, the airplane bounced and, upon the second touchdown, veered to the right and ground looped. The airplane exited the runway and impacted a drainage ditch. The airplane sustained substantial damage to the left wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.
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
What happened, in order
- Abnormal runway contact during landing
- Loss of control on ground during landing defining event
- Runway excursion during landing
- Collision with terrain or object (not controlled flight into terrain) during landing
The NTSB's findings
- cause Personnel issues › Task performance › Use of equip/info › Aircraft control › Pilot
- cause Aircraft › Aircraft oper/perf/capability › Performance/control parameters › Directional control › Not attained/maintained
- cause Aircraft › Aircraft oper/perf/capability › Performance/control parameters › Landing flare › Not attained/maintained
Pilot
- Certificate: private
- Ratings: single-engine land; single-engine sea
- Flight time: 2,477 hours in all; 1,616 in this make and model; 1 in the last 90 days; 1 in the last 30 days; 2,445 as pilot in command
- Last flight review: May 26, 2013
- Medical certificate: Class 3 (without waivers/limitations)
- Seat: frt
- Injury: no injuries
The aircraft
- Airframe total time: 1,583 hours
- Last inspection: continuous airworthiness programme, August 13, 2016
- Maximum gross weight: 2,300 lb
- Seats: 3
- Landing gear: fixed
- Engine: Lycoming O-360-C1G (piston); 1,775 hours total
The flight
- Departed from: EMM Kemmerer WY at 4:30 pm
- Destination: EMM Kemmerer WY
- Flight plan: none
- Runway 34, 8,203 ft by 75 ft
Weather at the time
- Light: daylight
- Visibility: 10 statute miles
- Temperature: 77°F (25°C), dew point 36°F (2°C)
- Altimeter: 30.48 inHg
- Observation at 4:55 pm from KEMM
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 | |||
| Passengers | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
2 documents, released by the NTSB on September 1, 2017. View them here, or download them; the NTSB redacts some personal details before release, and this site shows the NTSB's own titles rather than its file names.
| # | Document | What it is | |
|---|---|---|---|
| 1 | Pilot/operator Aircraft Accident Report, NTSB Form 6120.1 | PDF, 9 pages | View Download |
| 2 | Accident Photo | PDF, 1 page | View Download |
The same docket at the NTSB · documents without a copy here are fetched from the NTSB when you open them.
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.