Cessna 170A accident near La Grande, Oregon, June 20, 1984
On June 20, 1984 at about 3:40 am local time, a Cessna 170A, registered N9231A, was substantially damaged in an accident near La Grande, Oregon (La Grande airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 4 people were on board or involved. 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
- June 20, 1984 · about 3:40 am local time
- Place
- La Grande, Oregon · La Grande · map
- Type
- Accident
- Injuries
- No one was hurt; 4 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 170A · all 170As on the register
- Registration
- N9231A · registry record · serial 18992
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
DURING THE LANDING ROLL, THE ACFT VEERED TO THE RIGHT. THE PLT APPLIED LEFT RUDDER, BUT THIS DID NOT HELP. SUBSEQUENTLY, THE ACFT WENT OFF THE RWY & THE LEFT MAIN GEAR SANK INTO SOFT GROUND & COLLAPSED. AN EXAM OF THE ACFT WAS MADE, BUT NO REASON WAS FOUND FOR THE RIGHT BRAKE TO LOCK.
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
- Ratings: single-engine land; instrument: airplane
- Flight time: 2,040 hours in all; 27 in this make and model; 112 in the last 90 days; 1,861 as pilot in command
- Medical certificate: None (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 2,238 hours
- Last inspection: annual inspection, February 21, 1984
- Maximum gross weight: 2,200 lb
- Seats: 4
- Landing gear: fixed
- Engine: Continental O-300 (piston); 0 hours total
- Operator: Union Lumber CO
The flight
- Flight plan: none
- Runway 29, 4,576 ft by 150 ft
Weather at the time
- Light: dusk
- Visibility: 30 statute miles
- Sky: clear
- Temperature: 70°F (21°C), dew point 0°F (-18°C)
- Altimeter: 30.00 inHg
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 3 |
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.