Ayres S-2R accident near Brooten, Minnesota, August 28, 1999
On August 28, 1999 at about 7:30 pm local time, a Ayres S-2R, registered N8417V, was substantially damaged in an accident near Brooten, Minnesota. It was an aerial application (crop spraying) flight under agricultural flying rules (Part 137). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
the compressor impeller failure and the unsuitable terrain for landing encountered by the pilot.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 28, 1999 · about 7:30 pm local time
- Place
- Brooten, Minnesota · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Ayres S-2R
- Registration
- N8417V · no longer on the register · serial 2177R
- Damage
- Substantial damage
- Flight
- Aerial application (crop spraying) flight · agricultural flying rules (Part 137)
The NTSB's narrative final · quoted from the NTSB record
The pilot reported that after an aerial application run of approximately 30 minutes the aircraft departed the spray-run in a climbing right turn when the engine, '...burped once or twice and quit.' The pilot reported that the terrain around his position was heavily wooded except for a narrow swamp area in which he elected to land the aircraft. During the on-scene portion of the investigation, the engine and its components were examined. Partial disassembly of the P&W R-1340-AN1 engine disclosed that the blower impeller had failed which would have restricted induction air to the cylinders.
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: commercial pilot
- Ratings: multi-engine land; single-engine land; single-engine sea; instrument: airplane; rotorcraft: helicopter
- Flight time: 15,000 hours in all; 1,500 in this make and model; 180 in the last 90 days; 20 in the last 30 days
- Medical certificate: Class 2 (valid medical--w/ waivers/lim.)
- Seat: ctr
The aircraft
- Airframe total time: 6,298 hours
- Last inspection: annual inspection, August 2, 1999
- Maximum gross weight: 6,000 lb
- Seats: 1
- Landing gear: fixed
- Engine: P&W R-1340-AN1 (piston); 0 hours total
The flight
- Departed from: 6D1 at 7:00 pm
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 080° at 6 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 73°F (23°C), dew point 54°F (12°C)
- Altimeter: 30.00 inHg
- Observation at 8:55 pm from ILL, 23 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.