# NTSB ATL89DKG05: Grumman G-164A, N9755, Dawson, GA, July 31, 1989

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: July 31, 1989, 15:30 local (19:30 UTC)
- Place: Dawson, GA
- Location: 31.7719° N, 84.4435° W: Placed by OpenAirDocs: center of Dawson, GA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=31.7719&lon=-84.4435&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report February 15, 1991
- Report: Approved by Office Director
- NTSB case key (mKey): 7829
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL89DKG05
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/7829/pdf
- Page: https://openairdocs.org/ntsb/ATL89DKG05

## Probable cause

FAILURE OF THE NUMBER THREE CYLINDER HEAD.

## 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, maneuvering - aerial application
  - engine assembly,cylinder - failure,total (cause)
- Forced landing, maneuvering - turn to landing area (emergency)
- In flight collision with terrain/water, landing - flare/touchdown
  - terrain condition - crop

## Analysis

AS THE PILOT WAS MAKING A TURN-AROUND FOR ANOTHER SWATH RUN, THE ENGINE LOST POWER. SUBSEQUENTLY, THE AIRCRAFT WAS DAMAGED AS AN EMERGENCY LANDING WAS MADE IN AN ADJACENT COTTON FIELD. AN EXAMINATION OF THE ENGINE REVEALED THE #3 CYLINDER HEAD HAD FAILED.

## Aircraft

- Registration: [N9755](https://openairdocs.org/deregistered/N9755-2018-06-04), registration cancelled 2018-06-04, S/N 1250, 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: 1250
- Airframe hours: 1533
- Engines: P&W 985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Charles L. Mclendon
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, January 25, 1989, 276 hours before
- Departed: DAWSON, GA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 59; commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 14,142 total, 4,000 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 84 °F, dew point 70 °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 19890731030359A](https://openairdocs.org/incident/19890731030359A), Jul 31, 1989: Scwzer G164A, Dawson, GA, Substantial damage. Collided with the ground during a spray run when an engine cylinder failed.

## Other investigations on N9755 (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 CEN15LA175](https://openairdocs.org/ntsb/CEN15LA175), Mar 17, 2015: Grumman Acft ENG Cor-Schweizer G 164A (N9755), New Roads, LA, substantial damage. Probable cause: The loss of engine power due to three stuck exhaust valves.
- [NTSB ATL89DKG01](https://openairdocs.org/ntsb/ATL89DKG01), Feb 10, 1989: Grumman G-164A (N9755), Dawson, GA, substantial damage. Probable cause: TOTAL LOSS OF ENGINE POWER DUE TO LEAKING CARBURETOR FLOAT. CONTRIBUTING TO THE ACCIDENT WAS THE SOFT TERRAIN USED FOR A FORCED LANDING.

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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