Grumman-Schweizer G-164A accident near Plover, Wisconsin, August 17, 1988
On August 17, 1988 at about 2:00 pm local time, a Grumman-Schweizer G-164A, registered N8495, was substantially damaged in an accident near Plover, Wisconsin. 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 NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 17, 1988 · about 2:00 pm local time
- Place
- Plover, Wisconsin · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Grumman-Schweizer G-164A
- Registration
- N8495 · no longer on the register · serial 883
- 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 AIRCRAFT COLLIDED WITH A FARM MACHINERY SHED DURING AN AERIAL APPLICATION MANEUVER. THE PILOT STATED THAT THERE WAS NO POWERPLANT OR CONTROL MALFUNCTION. THE TEMPERATURE AT THE ACCIDENT SITE WAS 87 DEGREES (F), WITH A CALCULATED DENSITY ALTITUDE OF 2944 FEET. THE PILOT STATED THAT AN ENE WIND OFF A RIDGE JUST EAST OF THE FLIGHT PATH CREATED TURBULENCE.
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: single-engine land
- Flight time: 3,100 hours in all; 1,500 in this make and model; 400 in the last 90 days; 200 in the last 30 days; 3,030 as pilot in command
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: frt
The aircraft
- Airframe total time: 4,317 hours
- Last inspection: annual inspection, December 8, 1987; 432 hours since
- Maximum gross weight: 4,500 lb
- Seats: 1
- Landing gear: fixed
- Engine: P&W R-1340-AN1 (piston); 0 hours total
The flight
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 230° at 10 knots
- Visibility: 10 statute miles
- Sky: scat at 10,000 ft
- Temperature: 88°F (31°C), dew point 72°F (22°C)
- Altimeter: 29.00 inHg
- Observation at 6:51 pm from MSN, 75 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.
Other NTSB records under N8495 the same tail number, which may have belonged to a different aircraft at the time
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.