Cessna 172 accident near Lyons, Colorado, August 12, 1984
On August 12, 1984 at about 7:44 pm local time, a Cessna 172, registered N7064G, was destroyed in an accident near Lyons, Colorado. 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
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 12, 1984 · about 7:44 pm local time
- Place
- Lyons, Colorado · map
- Type
- Accident
- Injuries
- 1 person was killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 172 · all 172s on the register
- Registration
- N7064G · no longer on the register · serial 17258764
- Damage
- Destroyed
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE ACFT PLUNGED TO THE GROUND AFTER BEING SEEN DOING A SERIES OF STALL/SPIN MANEUVERS AT A LOW ALT. ONE WITNESS SAW THEFINAL MANEUVER AND AFTER SEEING THE ACFT DISAPPEAR BEHIND TREES HE WENT IN SEARCH OF IT AND FOUND IT ABOUT 100 YDS SOUTHOF THE POSITION HE HAD CALCULATED AS ITS ACCIDENT LOCATION. PHYSICAL EVIDENCE AT THE SCENE INDICATED THAT THE ACFT HAD 'SPUN IN.' NO MALFUNCTIONS OF THE ACFT WERE INDICATED BY THE EVIDENCE. EVIDENCE OF THE AUTOPSY REVEALED NO SIGN OF INCAPACITATION; HOWEVER THE EVIDENCE DID SHOW THAT THE PLT HAD CANCER OF AN ADVANCED NATURE. THE FAMILY OF THE PLT SAID THAT THE PLT HAD BEEN AWARE OF HIS CANCER FOR ABOUT ONE YEAR.
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, private
- Ratings: multi-engine land; single-engine land; instrument: airplane
- Flight time: 14,500 hours in all; 1,134 in this make and model; 1 in the last 30 days
- Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 3,054 hours
- Last inspection: annual inspection, June 5, 1984; 7 hours since
- Maximum gross weight: 2,300 lb
- Seats: 4
- Landing gear: fixed
- Engine: Lycoming O-320-E2D (piston); 0 hours total
The flight
- Departed from: 2V2 Longmont CO at 5:00 pm
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 090° at 5 knots
- Visibility: 30 statute miles
- Sky: clear
- Temperature: 84°F (29°C), dew point 0°F (-18°C)
- Altimeter: 30.00 inHg
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.
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.