# NTSB FTW93LA153: Grumman G-164B, N6639Q, Arnaudville, LA, May 12, 1993

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 12, 1993, 09:00 local (14:00 UTC)
- Place: Arnaudville, LA
- Coordinates: 30.400602, -91.930282 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.4006&lon=-91.9303&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 25, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 18746
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW93LA153
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18746/pdf
- Page: https://openairdocs.org/ntsb/FTW93LA153

## Probable cause

THE LOSS OF ENGINE POWER FOR UNDETERMINED REASONS. A FACTOR WAS THE UNSUITABLE TERRAIN

## Sequence of events

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

- Loss of engine power, cruise - normal
  - reason for occurrence undetermined
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - none suitable (contributing factor)
  - terrain condition - rough/uneven
- Gear collapsed, landing - roll
  - landing gear,main gear - overload

## Analysis

DURING CRUISE OPERATIONS THE ENGINE BEGAN TO RUN ROUGH, FOR UNKNOWN REASONS, AND WOULD NOT SUPPORT FLIGHT. THE PILOT WAS FORCED TO LAND IN THE ONLY AVAILABLE TERRAIN, ROUGH AND UNEVEN, AND DURING THE LANDING ROLL THE MAIN LANDING GEAR COLLAPSED AND THE WING STRUCK THE GROUND

## Factual narrative

On May 12, 1993, at 0900 central daylight time (CDT), a Grumman G 164B, N6639Q, was substantially damaged during the landing roll following a forced landing to unsuitable terrain. The commercial pilot, owner and operator, was not injured during the visual flight rules (VFR) flight.

The pilot reported to a Federal Aviation Administration (FAA) inspector that following agriculture operations he was enroute to his private airstrip, when the engine began to run rough and would not sustain flight, so he elected to land in the only available area. His touchdown was made to rice paddy. He reported that during the landing roll the main landing gear sank into a hole and was severed and that the airplane pitched to the side and damaged the right wing.

An examination of the engine failed to reveal any anomalies that could have caused the loss of engine power.

The airplane was released to the owner by the FAA inspector following his examination of the accident scene and the airplane.

## Aircraft

- Registration: [N6639Q](https://openairdocs.org/deregistered/N6639Q-2013-02-13), registration cancelled 2013-02-13, S/N 169B, built 1976 (OpenAirDocs)
- Reported make and model: GRUMMAN G-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: 169B
- Airframe hours: 7198
- Engines: P&W R-985-14B 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Bonnin, Eddie J., doing business as Eddie Flying Service Inc
- Registered owner: Bonnin, Eddie J.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, February 3, 1993, 60 hours before
- Departed: NONE, CECILIA, LA
- Destination: NONE

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 5,766 total, 4,500 in this make and model, 5,700 as pilot in command, 72 in the last 90 days, 58 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 9 knots
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 75 °F, dew point 61 °F
- Altimeter: 29.00 inHg

## 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 19930512013369A](https://openairdocs.org/incident/19930512013369A), May 12, 1993: Scwzer G164B, Arnaudville, LA, Substantial damage. Lost power returning to base. Collapsed right main in a hole on forced landing damaging wing. Cause undetermined.

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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