# NTSB SEA92LA125: Grumman G-164A, N8938H, Coulee City, WA, June 11, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 11, 1992, 10:00 local (17:00 UTC)
- Place: Coulee City, WA
- Coordinates: 47.659473, -119.429763 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.6595&lon=-119.4298&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 31, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 42832
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA92LA125
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/42832/pdf
- Page: https://openairdocs.org/ntsb/SEA92LA125

## Probable cause

A LOSS OF ENGINE POWER FOR UNDETERMINED REASONS. FACTORS INCLUDE SOFT TERRAIN.

## Sequence of events

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

- Loss of engine power, maneuvering
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - soft (contributing factor)

## Analysis

THE GRUMMAN G-164A LOST POWER DURING AN AERIAL APPLICATION RUN, AND THE PILOT LANDED IN AN OPEN FIELD. UPON TOUCHDOWN IN THE SOFT DIRT, THE AIRCRAFT NOSED OVER.

## Aircraft

- Registration: [N8938H](https://openairdocs.org/deregistered/N8938H-2014-11-20), registration cancelled 2014-11-20, S/N 1366, built 1974 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164A
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1366
- Engines: P&W R-985-AN1 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Leander, Kay D.
- Registered owner: Leander, Kay D.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, January 2, 2000
- Destination: WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 46; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 6,800 total, 2,450 in this make and model, 6,400 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: 310° at 3 knots, gusting 7
- Visibility: 30 statute miles
- Lowest ceiling: none

## 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 19920611020039A](https://openairdocs.org/incident/19920611020039A), Jun 11, 1992: Scwzer G164A, Coulee City, WA, Substantial damage. Topped tanks prior ag flight. Engine quit after 15 minutes into flight. Nosed over on forced landing.

## Other investigations on N8938H (1)

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 FTW90DRD07](https://openairdocs.org/ntsb/FTW90DRD07), May 2, 1990: Grumman G-164A (N8938H), Ville Platte, LA, destroyed. Probable cause: PARTIAL LOSS OF ENGINE POWER DUE TO A CRACKED NUMBER FOUR CYLINDER INTAKE ROCKER BOX HOUSING. THE LACK OF A SUITABLE FORCED LANDING SITE WAS A RELATED FACTOR.

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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