The U.S. aircraft register, updated daily
Accidents · NTSB CHI04FA203 · Final report

Amateur-built Lancair Legacy 2000 accident near Madison, Wisconsin, August 1, 2004

On August 1, 2004 at about 11:49 pm local time, a amateur-built Lancair Legacy 2000, registered N98SN, was destroyed in an accident near Madison, Wisconsin (Dane County Regional airport). It was a personal flight under general aviation rules (Part 91). 1 person was killed. The weather was visual conditions (good weather).

The NTSB's probable cause their words, unchanged

A loss of engine power due to high engine temperatures which resulted in a failure of the number three piston, the pilot's continued operation of the airplane with known high temperature problems, the pilot's poor inflight planning, and the pilot's failure to maintain a proper emergency descent rate. A factor associated with the accident was the light pole that the airplane contacted.

Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.

What the record shows

Date
August 1, 2004 · about 11:49 pm local time
Place
Madison, Wisconsin · Dane County Regional · map
Type
Accident
Injuries
1 person was killed.
Weather
visual conditions (good weather)
Aircraft
Amateur-built Lancair Legacy 2000
Registration
N98SN · no longer on the register · serial L2K-189
Damage
Destroyed
Flight
Personal flight · general aviation rules (Part 91)

The NTSB's narrative final · quoted from the NTSB record

The amateur-built airplane was destroyed when it impacted a light pole and terrain during an off airport landing following a loss of engine power. The airplane was at an altitude of 8,000 feet mean sea level (msl), 15 miles southeast of the airport, when the pilot informed air traffic control (ATC) that he was having an engine problem and he needed to land. The controller cleared the airplane to land on either runway 32 or runway 21. The pilot told the controller, "Alright uh if you don't mind I'm going to circle around up here and uh see if I can iron out the problem and then uh I'll try to let you know what I need to do." Two minutes later, the controller informed the pilot that he was now eight miles from the airport. The pilot responded that he had the airport in site. The controller informed the pilot that runway 32 was the closest runway to his present position to which the pilot responded that he would enter a left base for runway 21. Nineteen seconds later, the pilot reported he was "really having problems" and he was going to land on runway 32. The pilot then stated that he was losing altitude "really bad" and he did not think he was going to make it to the airport. The airplane contacted a light pole and the terrain along a 4-lane divided roadway. The pilot was also the aircraft builder. He installed a supercharger system on the Continental IO-550 engine. Acquaintances of the pilot reported he told them he was experiencing problems with high oil temperatures and high cylinder head temperatures on the number one and number three cylinders. One acquaintance stated the pilot mentioned the problem approximately 10 months prior to the accident and others stated the pilot talked about the continuing problem on the day prior to the accident. Post accident inspection of the engine revealed a hole in the top of the engine case near the number two cylinder. An engine teardown revealed the engine had suffered internal heat and impact damage. Metal debris was found throughout the engine. All of the pistons and cylinders sustained heat and/or impact damage. The number three piston head was burned through along an approximate 60 degree arc around the circumference and down the side of the head past the rings The piston head was black in color. The piston rings were distorted and were out of their grooves. The airplane was equipped with an electronic flight instrument system (EFIS). The EFIS data showed the engine oil pressure was at its maximum of 69 pounds per square inch (psi) prior to takeoff and it decreased throughout the flight as the oil temperature increased. The data also indicated that after the pilot informed ATC of the engine problem, the airplane's rate of descent varied between 100 and 4,000 feet per minute.

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: private
  • Ratings: single-engine land; instrument: airplane
  • Flight time: 705 hours in all; 235 in this make and model; 44 in the last 90 days; 11 in the last 30 days; 625 as pilot in command
  • Last flight review: October 1, 2002
  • Medical certificate: Class 3 (valid medical--no waivers/lim.)
  • Injury: fatal

The aircraft

  • Airframe total time: 205 hours
  • Last inspection: condition inspection, June 1, 2003
  • Maximum gross weight: 2,600 lb
  • Seats: 2
  • Landing gear: retractable
  • Engine: Continental IO-550-N17 (piston); 0 hours total
  • Fire on the ground

The flight

  • Departed from: OSH Oshkosh WI at 11:23 pm
  • Destination: 6I2 Lebanon KY
  • Flight plan: IFR

Weather at the time

  • Light: daylight
  • Wind: from 230° at 5 knots
  • Visibility: 10 statute miles
  • Sky: clear
  • Temperature: 82°F (28°C), dew point 66°F (19°C)
  • Altimeter: 29.95 inHg
  • Observation at 11:53 pm from MSN, 2 miles away

Injuries

FatalSeriousMinorNone
Crew1

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.