# NTSB SEA86LA163: Stinson 108-3, N6606M, Sandy, OR, July 7, 1986

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: July 7, 1986, 12:55 local (19:55 UTC)
- Place: Sandy, OR
- Coordinates: 45.380859, -122.229072 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.3809&lon=-122.2291&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40438
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA86LA163
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40438/pdf
- Page: https://openairdocs.org/ntsb/SEA86LA163

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(partial) - nonmechanical, takeoff - initial climb
  - fuel system - undetermined (cause)
- Loss of control - in flight, maneuvering - turn to landing area (emergency)
  - aircraft handling - not maintained, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

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.

## Aircraft

- Registration: N6606M (not matched to a registry record)
- Reported make and model: STINSON 108-3
- Category: Airplane
- Serial number: 4606
- Airframe hours: 1799
- Engines: FRANKLIN 6A-350-C1A 220 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Laurence G. Godsey
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 21, 1986, 12 hours before
- Departed: 03S, SANDY, OR
- Destination: HIO, HILLSBORO, OR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 65; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 1,150 total, 750 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 310° at 8 knots
- Visibility: 15 statute miles
- Lowest ceiling: 8,000 ft broken
- Temperature: 70 °F, dew point 54 °F
- Altimeter: 30.00 inHg
- Observed at: TTD, 10 nm away

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19860707030939A](https://openairdocs.org/incident/19860707030939A), Jul 7, 1986: Univar 1083, Sandy, OR, Substantial damage. Engine surged during takeoff roll. Power fluctuations after liftoff. Dived into the ground on precautionary landing.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.