Stinson 108-3 accident near Sandy, Oregon, July 7, 1986
On July 7, 1986 at about 7:55 pm local time, a Stinson 108-3, registered N6606M, was substantially damaged in an accident near Sandy, Oregon. It was a personal flight under general aviation rules (Part 91). 1 person was seriously injured. 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
- July 7, 1986 · about 7:55 pm local time
- Place
- Sandy, Oregon · map
- Type
- Accident
- Injuries
- 1 person was seriously injured.
- Weather
- visual conditions (good weather)
- Aircraft
- Stinson 108-3 · all 108-3s on the register
- Registration
- N6606M · no longer on the register · serial 4606
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
PLT EXPERIENCED POWER SURGES ON TAKEOFF, ELECTED OFF-AIRPORT LANDING, ALLOWED ACFT TO CONTACT GROUND NOSE-LOW WHILE MANEUVERING TO AVOID TREES. INSPECTION DID NOT REVEAL MECHANICAL FAILURE/MALFUNCTION.
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: 1,150 hours in all; 750 in this make and model
- Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 1,799 hours
- Last inspection: annual inspection, June 21, 1986; 12 hours since
- Maximum gross weight: 2,400 lb
- Seats: 4
- Landing gear: fixed
- Engine: Franklin 6A-350-C1A (piston); 0 hours total
The flight
- Departed from: 03S Sandy OR at 7:55 pm
- Destination: HIO Hillsboro OR
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 310° at 8 knots
- Visibility: 15 statute miles
- Sky: broken clouds at 8,000 ft; scat at 2,000 ft
- Temperature: 70°F (21°C), dew point 54°F (12°C)
- Altimeter: 30.00 inHg
- Observation at 7:46 pm from TTD, 10 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.