# NTSB CEN24LA291: Ayres S2R-G6, N6136Z, Antioch, NE, July 26, 2024 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 3 · Limited · Final report - Date: July 26, 2024, 13:13 local (19:13 UTC) - Place: Antioch, NE · pasture - Coordinates: 42.04655, -102.64338 - Nearby events: https://openairdocs.org/map.md?lat=42.0466&lon=-102.6434&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Defining event: [Enroute: Fuel contamination](https://openairdocs.org/ntsb-events/193) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report November 13, 2025 - Report: Approved by Office Director - Investigation class: Class 3 - NTSB office: Central Region - Parties: FAA Flight Standards - NTSB case key (mKey): 194803 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN24LA291 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/194803/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=194803 - Page: https://openairdocs.org/ntsb/CEN24LA291 ## Probable cause A total loss of engine power due to fuel contamination from an undetermined source. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Fluids: fuel](https://openairdocs.org/ntsb-findings/01071010): Aircraft › Fluids/misc hardware · Fluid condition (probable cause); cases with it: [Ayres S2R-G6, 1 case](https://openairdocs.org/ntsb-findings/01071010/cases.md?model=0970216), [All aircraft, 1,695 cases](https://openairdocs.org/ntsb-findings/01071010/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Enroute: Fuel contamination](https://openairdocs.org/ntsb-events/193) (defining event); cases with it: [Ayres S2R-G6, 2 cases](https://openairdocs.org/ntsb-events/193/sequence.md?model=0970216), [All aircraft, 225 cases](https://openairdocs.org/ntsb-events/193/sequence.md) - [Emergency descent: Off-field or emergency landing](https://openairdocs.org/ntsb-events/440); cases with it: [Ayres S2R-G6, 4 cases](https://openairdocs.org/ntsb-events/440/sequence.md?model=0970216), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md) - [Landing: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Ayres S2R-G6, 8 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=0970216), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot reported a loss of engine power about 7 miles from the destination airport and about 500 ft above ground level (agl). He executed a forced landing to a pasture, during which the airplane impacted a fence. The airplane sustained substantial damage to both wings. Postaccident testing of fuel samples from the airframe and engine fuel filters exhibited a brown tint. The airframe fuel filter sample also appeared to contain some minor debris. Analysis of the fuel samples for corrosiveness and water-soluble components were within the specification. However, due to small sample volume from the filters, testing for volatility and contaminants could not be completed. A postaccident engine test run, conducted with clean fuel provided directly to the engine, revealed no engine-related anomalies. While it seems likely that the engine lost power due to fuel starvation resulting from contamination, the nature and source of that contamination could not be determined. ## Factual narrative On July 26, 2024, about 1313 central daylight time, an Ayres S2R-G6 airplane, N6136Z, was substantially damaged when it was involved in an accident near Alliance Municipal Airport (AIA), Antioch, Nebraska. The pilot was not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 positioning flight. The pilot reported that when the airplane was about 7 miles from the destination airport, about 500 ft agl, the engine exhaust gas temperature and torque decreased to zero. The engine did not respond to an increase in the throttle, and he executed a forced landing to a pasture in an unpopulated area. The airplane impacted a steel fence during the landing and sustained substantial damage to both wings. Fuel was present in the fuel tanks at the time of a postaccident examination. Fuel samples taken from each fuel tank were clear. However, a fuel sample from the airframe fuel filter exhibited a brown tint with minor debris, and a fuel sample taken from the engine fuel filter exhibited a brown tint with no obvious debris. Due to the small sample volume for the fuel filters, volatility and contaminants testing could not be completed. However, testing for corrosiveness and water-soluble components were within specifications. Additionally, a postaccident engine test run was conducted at the accident site with clean fuel provided directly to the engine. The engine started smoothly and ran without any anomalies observed. ## Aircraft - Registration: [N6136Z](https://openairdocs.org/aircraft/N6136Z), registered now, S/N G6-138, built 1996 (OpenAirDocs) - Reported make and model: AYRES CORPORATION S2R-G6 - Registry model: [Ayres S2R-G6](https://openairdocs.org/model/ayres-s2r-g6) (registry code 0970216) (OpenAirDocs) - Registry engine: [AiResearch TPE331 series](https://openairdocs.org/engine/airesearch-tpe331-series) (registry code 01514, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: G6-138 - Year built: 1996 - Airframe hours: 8714.6 - Engines: Honeywell TPE331-10AV-511B 715 horsepower turbo prop - Damage: Substantial damage - Flight: Positioning, Part 91 - Operator: Ag Solutions LLC, doing business as Ag Solutions - Registered owner: Ag Solutions LLC - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, February 12, 2024 - Departed: FET, Fremont, NE - Destination: AIA, Alliance, NE - Equipment: Satellite tracking device, Stall warning system ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 26; injuries: none; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review October 17, 2022; seat: single; restraint: 4-point; flight hours: 2,562 total, 636 in this make and model, 1,936 as pilot in command ## Weather - Conditions: Visual (VMC), Day - Wind: 170° at 17 knots, gusting 26 - Visibility: 8 statute miles - Lowest ceiling: none - Temperature: 91 °F, dew point 54 °F - Altimeter: 29.99 inHg - Observed at: KAIA, 7 nm away - METAR: METAR KAIA 261753Z AUTO 17017G26KT 8SM CLR 33/12 A2999 ## 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 20240726020769A](https://openairdocs.org/incident/20240726020769A), Jul 26, 2024: Ayres Corporation S2R-G6, Alliance, NE, Substantial damage. Acft departed kfet for a ferry flight to kaia. Aircraft departed kfet at 1212CDT with 228 gallons of fuel. 17 nautical miles out from kaia the decended to 500… ## Other investigations on N6136Z (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 FTW03LA159](https://openairdocs.org/ntsb/FTW03LA159), May 25, 2003: Ayres S2R-G6 (N6136Z), Palestine, AR, substantial damage. Probable cause: The shearing of the torsion shaft which resulted in a loss of engine power. A contributing factor was the lack of suitable terrain for the forced landing. ## Docket (6 files) The files NTSB released with the investigation on November 14, 2025, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=194803. 83.2 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 7.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19479399&FileExtension=pdf&FileName=Accident%20Report%20--%20CEN24LA291_redacted-Rel.pdf - Investigation photos (item 2, PDF, 4 pages, 741 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19478088&FileExtension=pdf&FileName=Investigation%20Photos%20--%20CEN24LA291-Rel.pdf - Video of engine test run (item 3, 3GP, 734 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19476385&FileExtension=3gp&FileName=Engine%20Run%20Video-Rel.3gp - Conversation summary -- FAA inspector (item 4, PDF, 1 page, 67 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19480671&FileExtension=pdf&FileName=ROC%20-%20FAA_Helmandollar_30Jul2024-Rel.pdf - Fuel testing summary (item 5, PDF, 5 pages, 538 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19235231&FileExtension=pdf&FileName=Fuel%20Testing%20Summary%20--%20CEN24LA291_redacted-Rel.pdf - Maintenance records (item 6, PDF, 4 pages, 73.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19487735&FileExtension=pdf&FileName=Maintenance%20Records%20--%20CEN24LA291_redacted-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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.