Cessna 150A accident near Twin Lake, Michigan, August 23, 1984
On August 23, 1984, a Cessna 150A, registered N7250X, was substantially damaged in an accident near Twin Lake, Michigan. It was a personal flight under general aviation rules (Part 91). 3 people were 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
- August 23, 1984
- Place
- Twin Lake, Michigan · map
- Type
- Accident
- Injuries
- 3 people were killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 150A · all 150As on the register
- Registration
- N7250X · no longer on the register · serial 15059350
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE ACFT COLLIDED WITH THE GROUND IN A SPIRAL LIKE DESCENT WITH THE ENG IN A POWER RETARDED STATE AS EVIDENCED BY THE SOUND EFFECTS. THE WAS NO MISSING OR BACKFIRING OF THE POWER PLANT. THE ACFT STRUCK THE GROUND VERTICALLY AFTER BEING SEEN IN A NOSE DWN VERTICAL DESCENT WHILE SPRIRALING. THE PLT HAD BEEN DISQUALIFIED BY THE FAA FOR MEDICAL REASONS. HE WAS TAKING DILANTIN FOR PREVENTION OF SEIZURES, WHICH IS A DISQUALIFYING MEDICATION FOR A FLT PHYSICAL. NOTHING OF A MECHANICL NATURE WAS FOUND WHICH WAS CAUSAL TO THE ACCIDENT PROFILE DURING THE POST ACCIDENT INVESTIGATION. THE AUTOPSY REVEALED MODERATE ARTERLOSCLEROTIC HEART DISEASE WITH CORONARY ARTERIOSCLEROSIS. THE PLT WAS 54 YEARS OLD.
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
- Flight time: 700 hours in all; 700 in this make and model
- Medical certificate: None
- Seat: left
The aircraft
- Airframe total time: 12 hours
- Last inspection: annual inspection, May 4, 1984; 12 hours since
- Maximum gross weight: 1,500 lb
- Seats: 2
- Landing gear: fixed
- Engine: Continental O-200-A (piston); 0 hours total
The flight
- Departed from: 31C Muskegon MI at 1:00 am
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 330° at 10 knots
- Visibility: 15 statute miles
- Sky: clear
- Temperature: 70°F (21°C), dew point 61°F (16°C)
- Altimeter: 29.00 inHg
- Observation at 1:50 am from MKG, 11 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 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.
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.