Amateur-built ACRO SPORT II accident near Winterset, Iowa, August 9, 2016
On August 9, 2016 at about 8:00 pm local time, a 1994 amateur-built ACRO SPORT II, registered N6214C, was substantially damaged in an accident during landing (landing roll) near Winterset, Iowa (Winterset 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 failure to maintain directional control of the airplane during the landing roll, which resulted in an on-ground collision with two parked airplanes.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 9, 2016 · about 8:00 pm local time
- Place
- Winterset, Iowa · Winterset Muni · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built ACRO SPORT II NO SERIES, built 1994
- Registration
- N6214C · no longer on the register · serial KJS 1993
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The commercial pilot was landing the airplane during a cross-country flight. The pilot reported that, during the landing roll, the airplane veered left. The pilot straightened the airplane and added power to go around, but the airplane again veered left, traveled off the side of the runway, and impacted two airplanes parked on the ramp. A postaccident examination of the airplane confirmed the pilot's report that there were no 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
- Loss of control on ground during landing (landing roll) defining event
- Collision with terrain or object (not controlled flight into terrain) during landing (landing roll)
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
- Environmental issues › Physical environment › Object/animal/substance › Aircraft › Contributed to outcome
Pilot
- Certificate: airline transport pilot, commercial pilot
- Ratings: multi-engine land; single-engine land; instructor: airplane single-engine; instructor: instrument airplane; instrument: airplane
- Flight time: 7,854 hours in all; 2.5 in this make and model; 107 in the last 90 days; 22 in the last 30 days; 4,806 as pilot in command; 2,320 on instruments
- Last flight review: March 12, 2016
- Medical certificate: Class 1 (with waivers/limitations)
- Seat: rear
- Injury: no injuries
Pilot-Rated Passenger
- Certificate: private
- Ratings: single-engine land
- Flight time: 447 hours in all; 0 in this make and model; 9.1 in the last 90 days; 5.5 in the last 30 days; 447 as pilot in command
- Last flight review: February 2, 2006
- Medical certificate: Class 1 (with waivers/limitations)
- Seat: frt
- Injury: no injuries
The aircraft
- Airframe total time: 88.5 hours
- Last inspection: annual inspection, May 18, 2016
- Maximum gross weight: 1,850 lb
- Seats: 2
- Landing gear: fixed
- Engine: Lycoming O-360-A1D (piston); 0 hours total
The flight
- Departed from: MCW Mason City IL at 6:40 pm
- Destination: 3Y3 Winterset IA
- Flight plan: none
- Runway 32, 3,002 ft by 50 ft
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: from 150° at 6 knots
- Visibility: 10 statute miles
- Sky: scat at 3,300 ft
- Temperature: 88°F (31°C), dew point 72°F (22°C)
- Altimeter: 29.95 inHg
- Observation at 3:54 pm from DSM, 22 miles away
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 August 8, 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, 10 pages | View Download |
| 2 | Record of Interviews | PDF, 2 pages | 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.