# NTSB SEA86LA247: Great Lakes 2T-1A-2, N3565L, Tillamook, OR, September 18, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 17, 1986, 19:30 local (Sep 18, 1986, 02:30 UTC)
- Place: Tillamook, OR
- Coordinates: 45.460254, -123.709548 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.4603&lon=-123.7095&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 10, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 40502
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA86LA247
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40502/pdf
- Page: https://openairdocs.org/ntsb/SEA86LA247

## Sequence of events

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

- In flight encounter with weather, cruise - normal
  - in-flight planning/decision - inadequate, pilot in command (cause)
  - weather condition - fog (contributing factor)
  - light condition - dusk (contributing factor)
  - weather condition - low ceiling (contributing factor)
  - became lost/disoriented, pilot in command (cause)
- Forced landing, descent - emergency
  - precautionary landing - attempted, pilot in command
  - flare - misjudged, pilot in command (cause)
  - terrain condition - rough/uneven (contributing factor)
  - weather condition - tailwind (contributing factor)
  - light condition - dusk (contributing factor)
- Main gear collapsed, landing - roll
  - terrain condition - ditch (cause)
- Nose over, landing - roll

## Analysis

A PRECAUTIONARY LANDING WAS MADE ON A FIELD DUE TO LOW FUEL, LOWERING CEILING AND VISIBILITY, ENSUING DARKNESS, AND THE PILOT NOT KNOWING HIS EXACT POSITION. LANDING WAS MADE ON AN UPHILL FIELD WITH A SLIGHT TAIL WIND. THE AIRCRAFT STRUCK A SWALE AND THEN BECAME AIRBORNE MOMENTARILY. WHEN IT TOUCHED DOWN AGAIN IT STRUCK A FENCE, ROLLED THROUGH ANOTHER FENCE, AND ACROSS A DITCH WHICH COLLAPSED BOTH MAIN GEAR. THE AIRCRAFT THEN ROLLED INVERTED.

## Aircraft

- Registration: [N3565L](https://openairdocs.org/deregistered/N3565L-2022-03-05), registration cancelled 2022-03-05, S/N 0804 (OpenAirDocs)
- Reported make and model: GREAT LAKES 2T-1A-2
- Registry model: [Great Lakes 2T-1A-2](https://openairdocs.org/model/great-lakes-2t-1a-2) (registry code 3910101) (OpenAirDocs)
- Registry engine: [Lycoming AEIO-360 series](https://openairdocs.org/engine/lycoming-aeio-360-series) (registry code 41522, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 0804
- Airframe hours: 900
- Engines: LYCOMING AEIO-360 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Richard C. Stokes
- Airworthiness certificate: Standard, Aerobatic
- Last inspection: 100 hour, August 1, 1984, 110 hours before
- Departed: CEC, CRESCENT CITY, CA
- Destination: AST, ASTORIA, WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 24; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: front; flight hours: 246 total, 180 in this make and model, 216 as pilot in command, 100 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: 210° at 5 knots
- Visibility: 3 statute miles
- Lowest ceiling: 800 ft overcast
- Temperature: 64 °F

## 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 19860917045399A](https://openairdocs.org/incident/19860917045399A), Sep 17, 1986: Grtlks 2T1A2, Tillamook, OR, Substantial damage. The aircraft nosed over during a precautionary landing. The pilot encountered deteriorating weather conditions.

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.