Mooney M20D accident near Hillsboro, Oregon, October 27, 1986
On October 27, 1986 at about 7:30 pm local time, a Mooney M20D, registered N6625U, was destroyed in an accident near Hillsboro, Oregon (Starks Twin Oaks Airpark airport). It was a personal flight 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
- October 27, 1986 · about 7:30 pm local time
- Place
- Hillsboro, Oregon · Starks Twin Oaks Airpark · map
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Mooney M20D · all M20Ds on the register
- Registration
- N6625U · no longer on the register · serial 120
- Damage
- Destroyed
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE PILOT ELECTED TO LAND WITH A 12 TO 15 KNOT TAILWIND. AN EXCESSIVE GROUND SPEED RESULTED WITH AN OVERSHOOT. THE PILOT ELECTED TO GO-AROUND TOO LATE AND ONCE THE GO-AROUND WAS ATTEMPTED THE AIRCRAFT STRUCK TREES AT THE DEPARTURE END OF THE RUNWAY AT ABOUT 10 FT AGL. THE ACFT CAME TO REST IN A FRESHLY PLOWED FIELD.
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: 1,139 hours in all; 60 in this make and model; 50 in the last 90 days
- Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 2,406 hours
- Last inspection: annual inspection, March 28, 1986
- Maximum gross weight: 2,500 lb
- Seats: 4
- Landing gear: retractable
- Engine: Lycoming O-360-AID (piston); 0 hours total
The flight
- Departed from: HIO Hillsboro OR at 7:00 pm
- Flight plan: none
- Runway 20, 2,100 ft by 50 ft
Weather at the time
- Light: daylight
- Visibility: 20 statute miles
- Sky: broken clouds at 4,500 ft; scat at 3,000 ft
- Temperature: 61°F (16°C), dew point 0°F (-18°C)
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.