# NTSB SEA89LA138: Grumman 164B, N6632Q, Hermiston, OR, July 19, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 19, 1989, 05:15 local (12:15 UTC)
- Place: Hermiston, OR
- Coordinates: 45.850532, -119.210083 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.8505&lon=-119.2101&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report January 23, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 41053
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA89LA138
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41053/pdf
- Page: https://openairdocs.org/ntsb/SEA89LA138

## Probable cause

THE AIRPORT OWNERS FAILURE TO MARK A HIDDEN HAZARD.

## Sequence of events

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

- On ground/water encounter with terrain/water, taxi - from landing
  - airport facilities,runway/landing area condition - water (cause)
  - airport facilities,runway/landing area condition - hidden obstruction(s) (cause)
  - airport facilities,obstruction marking - inadequate (cause)
  - other airport/runway maintenance - inadequate, airport personnel (cause)
- Nose over, taxi - from landing

## Analysis

THE PILOT TAXIED THROUGH WHAT HE THOUGHT WAS ONLY A PUDDLE OF WATER. IT TURNED OUT TO BE A DEEP HOLE FILLED WITH WATER THAT HAD WASHED OUT DUE TO A BROKEN UNDERGROUND WATER PIPE. PRIVATE STRIP.

## Aircraft

- Registration: [N6632Q](https://openairdocs.org/aircraft/N6632Q), registered now, S/N 159B (OpenAirDocs)
- Reported make and model: GRUMMAN 164B
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164B](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164b) (registry code 3952802) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1598
- Engines: P&W R-1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Positioning, Part 91
- Registered owner: Thomas H. White
- Airport: S & K Farm, runway 9, 5,000 × 100 ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 52; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; flight hours: 10,000 total, 8,000 in this make and model, 10,000 as pilot in command, 300 in the last 90 days, 100 in the last 30 days, 8 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dawn
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 61 °F, dew point -0 °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 19890719024699A](https://openairdocs.org/incident/19890719024699A), Jul 19, 1989: Scwzer G164B, Hermiston, OR, Substantial damage. Wheel hit a water filled hole while landing on Private sod strip. Aircraft flipped over.

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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