Amateur-built MAC ULTRALIGHT accident near Three Lakes, Wisconsin, July 24, 1984
On July 24, 1984 at about 2:35 pm local time, a amateur-built MAC ULTRALIGHT, registered UNREG, was destroyed in an accident near Three Lakes, Wisconsin (Three Lakes Mu. airport). It was a personal flight under ultralight rules (Part 103). 1 person was killed. 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
- July 24, 1984 · about 2:35 pm local time
- Place
- Three Lakes, Wisconsin · Three Lakes Mu. · map
- Type
- Accident
- Injuries
- 1 person was killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built MAC ULTRALIGHT MAC ULTRAL
- Registration
- UNREG · no longer on the register
- Damage
- Destroyed
- Flight
- Personal flight · ultralight rules (Part 103)
The NTSB's narrative final · quoted from the NTSB record
THE RECENTLY PURCHASED ULTRALIGHT WAS TAXIED FOR ABOUT 40 MINUTES PRIOR TO THE NEW OWNER TRYING HIS FIRST FLT. HE HAD BEEN ADVISED BY THE FORMER OWNER TO MAKE SHORT HOPS AT LOW ALTITUDE DURING A FAMILIARIZATION PERIOD. THE FORMER OWNER WANTED TO BE PRESENT FOR THIS PERIOD BECAUSE THE NEW OWNER HAD NO AVIATION EXPERIENCE. THE NEW OWNER TOOK OFF ON HIS FIRST FLT WITHOUT THE INSTRUCTION OF THE SHORT HOP PERIOD OF FAMILIARIZATION. THE TAKEOFF WENT OK AND THE ULTRALIGHT PROCEEDED DOWNWIND TO BASE IN A CONTROLLED LEVEL FLT. THE TURN TO FINAL APPROACH WAS OVERSHOT AND THE ULTRALIGHT ANGLED BACK TO 40 DEG OFF THE RWY HEADING. OVER A TREE HE WAS HEARD TO THROTTLE BACK TO DESCEND, THEN TO ACCELERATE AND DECELERATE. AT THIS TIME THE ULTRALIGHT WAS SEEN TO NOSE DOWN & DIVE INTO THE GROUND FROM ABOUT 100 FT AGL AT AN ANGLE OF ABOUT 30 DEGREES. THE ACFT WAS DESTROYED AND THE PLT FATALLY INJURED ON IMPACT. THE ENGINE WAS STARTED AND RUN AT VARIOUS POWER SETTINGS FOR 10 MINUTES IN A TEST AFTER THE ACCIDENT.
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
- Ratings: single-engine land
- Medical certificate: Unknown
- Seat: ctr
The aircraft
- Last inspection: inspection type not recorded
- Seats: 1
- Landing gear: fixed
- Engine: Kawasaki TA340A (piston); 0 hours total
The flight
- Flight plan: none
- Runway 3, 3,760 ft by 120 ft
Weather at the time
- Light: daylight
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 70°F (21°C), dew point 0°F (-18°C)
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 UNREG 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.