Cessna 150K accident near Oregon City, Oregon, November 18, 1983
On November 18, 1983 at about 11:45 pm local time, a Cessna 150K, registered N6054G, was substantially damaged in an accident near Oregon City, Oregon (Oregon City Airpark airport). It was a flight of an unrecorded kind under general aviation rules (Part 91). 1 person had minor injuries. 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
- November 18, 1983 · about 11:45 pm local time
- Place
- Oregon City, Oregon · Oregon City Airpark · map
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 150K · all 150Ks on the register
- Registration
- N6054G · no longer on the register · serial 15071554
- Damage
- Substantial damage
- Flight
- Flight of an unrecorded kind · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE PLT, WHO WAS AN A & P MECHANIC, HAD JUST INSTALLED AN ENG THAT HAD BEEN OVERHAULED BY SOMEONE ELSE. HE REPORTED THAT THE PRETAKEOFF & RUN-UP CHECKS WERE NORMAL. AT APRX 250 TO 300 FT AGL, DURING TAKEOFF, THE ENG BEGAN TO SHAKE VIOLENTLY & LOST POWER. THE PLT RETARDED THE THROTTLE & INITIATED A 180 DEG TURN TO LAND IN AN OPEN FIELD. THE LEFT WING TIP CONTACTED THE GROUND DURING THE FORCED LANDING & THE NOSE & RIGHT MAIN GEAR COLLAPSED. AN EXAM & DISASSEMBLY OF THE ENG REVEALED THAT THE #1 CONNECTING ROD HAD COME LOSE & PUNCTURED THE ENG CASE. ONE OF THE BOLTS HAD FAILED & WAS NECKED DOWN AT THE FRACTURE. THE NUTS ON THE REMAINING ROD CAPS WERE FOUND TO BE FINGER TIGHT OR ONLY SLIGHTLY TORQUED. THE REQUIRED TORQUE WAS 40 FOOT POUNDS. THE ENG HAD OPERATED APPRX .1 HR SINCE MAJOR OVERHAUL.
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: flight instructor, commercial pilot
- Ratings: single-engine land; instrument: airplane
- Flight time: 1,128 hours in all; 357 in this make and model; 3 in the last 90 days; 981 as pilot in command; 11 on instruments
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 4,743 hours
- Last inspection: inspection type not recorded, November 18, 1983; 0 hours since
- Maximum gross weight: 1,600 lb
- Seats: 2
- Landing gear: fixed
- Engine: Lycoming O-320-A2B (piston); 0 hours total
The flight
- Departed from: OS2 Oregon City OR at 11:45 pm
- Destination: OS2 Oregon City OR
- Flight plan: none
- Runway 25, 2,675 ft by 30 ft
Weather at the time
- Light: daylight
- Wind: from 250° at 5 knots
- Visibility: 40 statute miles
- Sky: broken clouds at 5,500 ft; scat at 4,000 ft
- Temperature: 54°F (12°C), dew point 43°F (6°C)
- Altimeter: 30.00 inHg
- Observation at 11:00 pm from PDX, 16 miles away
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.