# NTSB FTW83LA205: Grumman G-164A, N4564, Anahuac, TX, April 25, 1983

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: April 25, 1983, 08:30 local (13:30 UTC)
- Place: Anahuac, TX
- Coordinates: 29.760284, -94.670753 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=29.7603&lon=-94.6708&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 20877
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW83LA205
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/20877/pdf
- Page: https://openairdocs.org/ntsb/FTW83LA205

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, cruise - normal
  - eng assembly,blower/impeller/integral supercharger - failure,total (cause)
  - load jettison - performed, pilot in command (contributing factor)
- Forced landing, landing - flare/touchdown
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - ground (contributing factor)
  - ground loop/swerve - inadvertent, pilot in command (contributing factor)
  - terrain condition - rough/uneven (contributing factor)
- Fire, landing - roll

## Analysis

THE ACFT GROUNDLOOPED IN RUTS DURING A FORCED LANDING AFTER THE ENGINE QUIT. A GROUND FIRE DESTROYED THE ACFT. THE ACFT HAD APPROACHED THE FIELD TO BE SPRAYED AND A WITNESS ON THE GROUND SAID THE ENGINE SOUNDED LIKE IT WAS BEING THROTTLED BACK. WHEN THE PILOT TRIED TO ADD POWER THE ENGINE DID NOT RESPOND AND SHORTLY AFTERWARDS IT FAILED COMPLETELY. THE PILOT DUMPED THE SPRAY LOAD, TURNED AND LANDED IN A RICE FIELD. THE ACFT HIT RUTS AND GROUNDLOOPED. A POSTCRASH FIRE DESTROYED THE ACFT. THE POSTCRASH INVESTIGATION REVEALED A MALFUNCTION IN THE IMPELLER AND SHAFT ASSEMBLY ALLOWING THE IMPELLER TO DRAG AGAINST ITS HOUSING. AN A&P MECHANIC SAID THIS FAILED THE ENGINE.

## Aircraft

- Registration: [N4564](https://openairdocs.org/deregistered/N4564-1984-05-01), registration cancelled 1984-05-01, S/N 1059, built 1973 (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)
- Category: Airplane
- Serial number: 1059
- Airframe hours: 3133
- Engines: P&W R1340-AN1 600 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Aerial application, Part 137
- Registered owner: Swwope Ag Air
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, February 2, 1983
- Departed: ANAHUAC, TX

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 20; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 450 total, 230 in this make and model, 350 as pilot in command, 35 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 5 knots
- Visibility: 7 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 19830425015679A](https://openairdocs.org/incident/19830425015679A), Apr 25, 1983: Scwzer G164A, Anahuac, TX, Destroyed. Engine lost power shortly after takeoff from ag strip. Crashed and burned. Turbo impeller shaft malfunction.

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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