Cessna 150H accident near Osceola, Wisconsin, June 28, 1998
On June 28, 1998 at about 8:45 pm local time, a Cessna 150H, registered N50433, was substantially damaged in an accident near Osceola, Wisconsin. It was an instructional flight under general aviation rules (Part 91). 2 people had minor injuries. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
the student pilot's incomplete preflight, and the instructor pilot's inadequate supervision of the student's preflight. Factors were the fuel contaminated with water, and the roadway encountered during the forced landing rollout.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- June 28, 1998 · about 8:45 pm local time
- Place
- Osceola, Wisconsin · map
- Type
- Accident
- Injuries
- 2 people had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 150H · all 150Hs on the register
- Registration
- N50433 · no longer on the register · serial 15069300
- Damage
- Substantial damage
- Flight
- Instructional flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
In the written statement the instructor said that during the preflight the student found water in the fuel. He indicated that there was additional fuel drawn in an attempt to remove the water. He said he was confident that no water was left in the system. After conducting some touch and go landings, and during initial climb, the engine suffered a total loss of power. A forced landing was conducted in an area where the airplane impacted a roadway and nosed over. A subsequent examination of the gascolator found about 80% water contained in the sample drawn from that location.
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: flight instructor, commercial pilot
- Ratings: multi-engine land; single-engine land; instructor: airplane multi-engine; instructor: airplane single-engine; instructor: instrument airplane; instrument: airplane
- Flight time: 1,868 hours in all; 3 in this make and model; 288 in the last 90 days; 55 in the last 30 days; 1,777 as pilot in command; 892 on instruments
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: rgt
The aircraft
- Airframe total time: 4,025 hours
- Last inspection: annual inspection, February 27, 1998; 37 hours since
- Maximum gross weight: 1,600 lb
- Seats: 2
- Landing gear: fixed
- Engine: Continental O-200-A (piston); 0 hours total
The flight
- Departed from: OEO Osceola WI at 8:45 pm
- Destination: ANE Blane MN
- Flight plan: none
- Runway 0
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: from 250° at 17 knots, gusting 22
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 81°F (27°C), dew point 55°F (13°C)
- Altimeter: 29.00 inHg
- Observation at 8:55 pm from MSP, 24 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 2 |
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 N50433 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.