Aeronca 7AC accident near Prineville, Oregon, August 9, 1984
On August 9, 1984 at about 5:00 pm local time, a Aeronca 7AC, registered N83233, was substantially damaged in an accident near Prineville, Oregon (None airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 1 person was 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
- August 9, 1984 · about 5:00 pm local time
- Place
- Prineville, Oregon · None · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Aeronca 7AC · all 7ACs on the register
- Registration
- N83233 · registry record · serial 7AC-1897
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
WHILE MANEUVERING PLT HEARD A LOUD CHATTER COMING FROM THE ENGINE ACCOMPANIED BY A LOSS OF POWER. PLT REDUCED REMAINING POWER AND INITIATED A FORCED LANDING IN A ROUGH BARLEY FIELD. POST ACCIDENT INVESTIGATION REVEALED THE CRANKSHAFT BROKE NEAR THE NUMBER TWO CRANKTHROW. FURTHER INVESTIGATION REVEALED THE JOURNAL WAS IMPROPERLY GROUND.
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: student
- Ratings: single-engine land
- Medical certificate: Class 3 (valid medical--no waivers/lim.)
- Seat: unk
The aircraft
- Last inspection: inspection type not recorded
- Maximum gross weight: 1,220 lb
- Seats: 2
- Landing gear: fixed
- Engine: Continental C-65-8 (piston); 0 hours total
The flight
- Departed from: S39 Prineville OR at 4:30 pm
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Visibility: 50 statute miles
- Sky: clear
- Temperature: 79°F (26°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.