# NTSB CEN23LA197: Gulfstream-Schweizer A/C Gulfstream AM G-164B, N8337K, Gueydan, LA, May 22, 2023

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 4 · Limited · Final report
- Date: May 22, 2023, 10:00 local (15:00 UTC)
- Place: Gueydan, LA
- Coordinates: 30.006686, -92.474597 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.0067&lon=-92.4746&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Defining events: [Landing: Collision during takeoff/land](https://openairdocs.org/ntsb-events/490); [Takeoff: Collision during takeoff/land](https://openairdocs.org/ntsb-events/490)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- Investigation class: Class 4 - Basic report with no Prelim publish
- NTSB office: Central Region
- Parties: FAA Baton Rouge FSDO
- NTSB case key (mKey): 192225
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN23LA197
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/192225/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=192225
- Page: https://openairdocs.org/ntsb/CEN23LA197

## Probable cause (aircraft 1)

The failure of both pilots to see and avoid each other resulting in a collision on the airstrip. Contributing was the pilots’ failure to announce their intentions over their radios as they were taking off and landing.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Attention/monitoring: task monitoring/vigilance](https://openairdocs.org/ntsb-findings/02021520): Personnel issues › Psychological · Pilot (probable cause), aircraft 1; cases with it: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164B, 1 case](https://openairdocs.org/ntsb-findings/02021520/cases.md?model=3979904), [All aircraft, 330 cases](https://openairdocs.org/ntsb-findings/02021520/cases.md)
- [Communication (personnel): lack of communication](https://openairdocs.org/ntsb-findings/02063510): Personnel issues › Task performance · Pilot (probable cause), aircraft 1; cases with it: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164B, 1 case](https://openairdocs.org/ntsb-findings/02063510/cases.md?model=3979904), [All aircraft, 84 cases](https://openairdocs.org/ntsb-findings/02063510/cases.md)
- [Attention/monitoring: task monitoring/vigilance](https://openairdocs.org/ntsb-findings/02021520): Personnel issues › Psychological · Pilot (probable cause), aircraft 2; cases with it: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164D, 1 case](https://openairdocs.org/ntsb-findings/02021520/cases.md?model=3979908), [All aircraft, 330 cases](https://openairdocs.org/ntsb-findings/02021520/cases.md)
- [Communication (personnel): lack of communication](https://openairdocs.org/ntsb-findings/02063510): Personnel issues › Task performance · Pilot (probable cause), aircraft 2; cases with it: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164D, 1 case](https://openairdocs.org/ntsb-findings/02063510/cases.md?model=3979908), [All aircraft, 84 cases](https://openairdocs.org/ntsb-findings/02063510/cases.md)

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Landing: Collision during takeoff/land](https://openairdocs.org/ntsb-events/490) (defining event), aircraft 1; cases with it: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164B, 1 case](https://openairdocs.org/ntsb-events/490/sequence.md?model=3979904), [All aircraft, 1,309 cases](https://openairdocs.org/ntsb-events/490/sequence.md)
- [Takeoff: Collision during takeoff/land](https://openairdocs.org/ntsb-events/490) (defining event), aircraft 2; cases with it: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164D, 1 case](https://openairdocs.org/ntsb-events/490/sequence.md?model=3979908), [All aircraft, 1,309 cases](https://openairdocs.org/ntsb-events/490/sequence.md)

## Analysis (aircraft 1)

The two airplanes were conducting agricultural operations at a private airstrip. The pilot of the landing airplane reported that, while airborne, he noticed the departing airplane was being loaded at the tender truck. The pilot of the landing airplane estimated that he would have enough time to land and clear the runway before the departing airplane was finished loading. The pilot of the departing airplane reported that after loading, he positioned his airplane on the runway and began his takeoff roll. Meanwhile, the pilot of the landing airplane touched down in the opposite direction of the departing airplane. The pilot of the landing airplane reported that while he was slowing down on the landing roll, he looked over his airplane’s hopper and noticed the departing airplane rolling toward him. The pilot of the landing airplane attempted to veer out of the way of the departing airplane but was unsuccessful. The left wing of the landing airplane struck the left wing of the departing airplane. The landing airplane sustained substantial damage to both left wings, the fuselage, the horizontal stabilizer, and the elevator. The departing airplane sustained substantial damage to all four wings and the fuselage. Both pilots reported that there were no preimpact mechanical failures or malfunctions with the airplanes that would have precluded normal operation. Both pilots reported that neither made a radio call announcing their intentions.

## Aircraft 1

- Registration: [N8337K](https://openairdocs.org/deregistered/N8337K-2023-12-27), registration cancelled 2023-12-27, S/N 17D, built 1980 (OpenAirDocs)
- Reported make and model: GULFSTREAM-SCHWEIZER A/C CORP GULFSTREAM AM G-164B
- Registry model: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164B](https://openairdocs.org/model/gulfstream-schweizer-a-c-gulfstream-am-g-164b) (registry code 3979904) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Airplane
- Serial number: 17D
- Year built: 1980
- Engines: Pratt and Whitney PT634AG turbo prop
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Vincent Flying Service
- Registered owner: Cajun Cats LLC
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, May 6, 2023

## Aircraft 2

- Registration: [N8331K](https://openairdocs.org/deregistered/N8331K-2026-09-21), registration cancelled 2026-09-21, S/N 16D, built 1980 (OpenAirDocs)
- Reported make and model: GULFSTREAM-SCHWEIZER A/C CORP GULFSTREAM AM G-164D
- Registry model: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164D](https://openairdocs.org/model/gulfstream-schweizer-a-c-gulfstream-am-g-164d) (registry code 3979908) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Airplane
- Serial number: 16D
- Year built: 1980
- Engines: Pratt and Whitney turbo prop
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Vincent Flying Service
- Registered owner: Church Street Holding LLC
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, May 9, 2023

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot, aircraft N8337K; age 50; commercial; airplane ratings: single-engine land; medical: class 2; last flight review January 31, 2023; seat: single; restraint: 3-point; flight hours: 14,050 total, 13,500 in this make and model, 14,050 as pilot in command, 200 in the last 90 days, 10 in the last 24 hours
- Pilot, aircraft N8331K; age 65; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; seat: single; flight hours: 24,000 total, 9,000 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 8 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 64 °F
- Altimeter: 29.98 inHg
- Observed at: KLFT, 29 nm away
- METAR: KLFT 221553Z VRB03KT 8SM CLR 26/18 A2998 RMK AO2 SLP152 T02560183,M

## FAA reports on this event (2)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 20230522004292A](https://openairdocs.org/incident/20230522004292A), May 22, 2023: Gulfstream-Schweizer A/C Corp GULFSTREAM AM G-164D, Gueydan, LA, Destroyed. The aircraft had 100 h inspection completed early may 2023. There is an modification installed on the aircraft with an oversized hopper. The aircraft landed on…
- [Accident 20230522004302A](https://openairdocs.org/incident/20230522004302A), May 22, 2023: Gulfstream-Schweizer A/C Corp GULFSTREAM AM G-164D, Gueydan, LA, Substantial damage. The aircraft had 100 h inspection completed early may 2023. There is an modification installed on the aircraft with an oversized hopper. The aircraft just…

## Other investigations on N8337K (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 FTW00LA178](https://openairdocs.org/ntsb/FTW00LA178), Jun 6, 2000: Gulfstream-Schweizer G-164D (N8337K), Welsh, LA, substantial damage. Probable cause: The excessive wear of the reduction gearbox's 1st stage sungear, which resulted in its subsequent fatigue fracture and failure. Factors were the operator not performing the recommended overhaul of…

## Docket (5 files)

The files NTSB released with the investigation on July 27, 2023, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=192225. 21.1 MB in all.

- Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 2.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15713442&FileExtension=pdf&FileName=6120%20N8331K_Redacted-Rel.pdf
- Pilot/operator aircraft accident report, NTSB form 6120.1 N8337K (item 2, PDF, 9 pages, 4.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15712898&FileExtension=pdf&FileName=6120%20N8337K_Redacted-Rel.pdf
- Photos (item 3, PDF, 4 pages, 14.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15741191&FileExtension=pdf&FileName=Photo%20Array_Redacted-Rel.pdf
- Memorandum for record - conversation (item 4, PDF, 1 page, 63 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15768842&FileExtension=pdf&FileName=MFR%20Hebert-Rel.pdf
- Memorandum for record - pilot conversation (item 5, PDF, 1 page, 64 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15769179&FileExtension=pdf&FileName=MFR%20Vincent-Rel.pdf

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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