# NTSB SEA86LA109: Grumman G164-A, N25SK, Echo, OR, April 23, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 23, 1986, 15:59 local (23:59 UTC)
- Place: Echo, OR
- Coordinates: 45.66085, -119.229148 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.6609&lon=-119.2291&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40392
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA86LA109
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40392/pdf
- Page: https://openairdocs.org/ntsb/SEA86LA109

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, climb - to cruise
  - fluid,fuel - contamination (cause)
- Forced landing, descent - uncontrolled
- Nose over, landing - roll
  - weather condition - tailwind (contributing factor)
  - terrain condition - high vegetation (contributing factor)

## Analysis

A LOSS OF POWER OCCURRED SHORTLY AFTER TAKEOFF ON A DOWNWIND DEPARTURE. A FORCED LANDING WAS ACCOMPLISHED ONTO A WHEAT FIELD DOWNHILL. THE AIRCRAFT NOSED OVER DURING THE LANDING ROLL. POST ACCIDENT INSPECTION OF THE AIRCRAFT DISCLOSED FUEL CONTAMINATION.

## Aircraft

- Registration: [N25SK](https://openairdocs.org/deregistered/N25SK-2000-05-02), registration cancelled 2000-05-02, S/N 1335 (OpenAirDocs)
- Reported make and model: GRUMMAN G164-A
- Registry model: [Grumman G-164A](https://openairdocs.org/model/grumman-g-164a) (registry code 3952704) (OpenAirDocs)
- Category: Airplane
- Serial number: 1335
- Engines: P&W R-985-AN1 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Positioning, Part 91
- Registered owner: West Flying Service, Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Departed: S57, ECHO, OR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 48; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 14,000 total, 1,800 in this make and model, 230 in the last 90 days, 9 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 3 knots
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 50 °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 19860423073749A](https://openairdocs.org/incident/19860423073749A), Apr 23, 1986: Scwzer G164A, Echo, OR, Substantial damage. Engine lost power on downwind departure. Nosed over on the forced landing. Found fuel contamination.

## Other investigations on N25SK (2)

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.

- [NTSB FTW96LA329](https://openairdocs.org/ntsb/FTW96LA329), Jul 31, 1996: Grumman G-164A (N25SK), Burlington, CO, substantial damage. Probable cause: The total loss of engine power resulting from a cracked cylinder. A factor was the unsuitable terrain for the forced landing.
- [NTSB SEA79DYP32](https://openairdocs.org/ntsb/SEA79DYP32), Jul 3, 1979: Grumman G-164A (N25SK), Lewiston, ID, substantial damage

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.

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