# NTSB CEN11CA224: Ayres S2R-T34, N92KM, Swan Lake, AR, March 12, 2011 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Data collection · Final report - Date: March 11, 2011, 18:00 local (Mar 12, 2011, 00:00 UTC) - Place: Swan Lake, AR - Coordinates: 34.209545, -92.010612 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=34.2095&lon=-92.0106&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Defining event: [Approach-VFR pattern final: Windshear or thunderstorm](https://openairdocs.org/ntsb-events/390) - Highest injury: Minor injuries - Injuries: 1 minor - Status: Completed, report June 8, 2011 - Report: Approved by Office Director - NTSB office: Central Region - Parties: FAA Flight Standards District Office - NTSB case key (mKey): 78545 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN11CA224 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/78545/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=78545 - Page: https://openairdocs.org/ntsb/CEN11CA224 ## Probable cause An in-flight collision with power lines following an encounter with a wind gust. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Object/animal/substance: wire](https://openairdocs.org/ntsb-findings/03022032): Environmental issues › Physical environment · Effect on operation (probable cause); cases with it: [Ayres S2R-T34, 6 cases](https://openairdocs.org/ntsb-findings/03022032/cases.md?model=0970106), [All aircraft, 588 cases](https://openairdocs.org/ntsb-findings/03022032/cases.md) - [Wind: gusts](https://openairdocs.org/ntsb-findings/03034045): Environmental issues › Conditions/weather/phenomena · Effect on operation (probable cause); cases with it: [Ayres S2R-T34, 1 case](https://openairdocs.org/ntsb-findings/03034045/cases.md?model=0970106), [All aircraft, 1,199 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Approach-VFR pattern final: Windshear or thunderstorm](https://openairdocs.org/ntsb-events/390) (defining event); cases with it: [Ayres S2R-T34, 1 case](https://openairdocs.org/ntsb-events/390/sequence.md?model=0970106), [All aircraft, 224 cases](https://openairdocs.org/ntsb-events/390/sequence.md) - [Approach-VFR pattern final: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Ayres S2R-T34, 8 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=0970106), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis According to the pilot, he was approaching the airport to land when he encountered a gust of wind. The airplane collided with power lines and subsequently impacted the ground below, coming to rest inverted. The empennage was twisted and partially separated, and both wings were crushed. The pilot reported no preimpact mechanical anomalies with the airplane. ## Factual narrative According to the written statement submitted by the pilot, he was approaching the airport to land when he encountered a gust of wind. The airplane subsequently impacted power lines and subsequently impacted the ground below, inverted. The empennage was twisted and partially separated, and both wings were crushed. The pilot did not report any mechanical anomalies with the airplane prior to the accident. ## Aircraft - Registration: [N92KM](https://openairdocs.org/aircraft/N92KM), registered now, S/N T41-175DC, built 1992 (OpenAirDocs) - Reported make and model: AYRES CORPORATION S2R-T34 - Registry model: [Ayres S2R-T34](https://openairdocs.org/model/ayres-s2r-t34) (registry code 0970106) (OpenAirDocs) - Registry engine: [Pratt & Whitney PT6A series](https://openairdocs.org/engine/pratt-whitney-pt6a-series) (registry code 52032, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: T41-175DC - Airframe hours: 8982.2 - Engines: P&W PT6A SER 750 horsepower turbo prop - Damage: Substantial damage - Flight: Aerial application, Part 137 - Operator: Swan Lake Flying Service Inc - Registered owner: Swan Lake Flying Service Inc - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, April 15, 2010 - Departed: PVT, Swan Lake, AR - Destination: PVT, Swan Lake, AR - Airport: PVT, Swan Lake ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 55; injuries: minor; commercial; airplane ratings: single-engine land; medical: class 2, with waivers/limitations; last flight review May 9, 2009; seat: front; flight hours: 9,139 total, 5,100 in this make and model, 9,139 as pilot in command, 150 in the last 90 days, 150 in the last 30 days, 7 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 180° at 11 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 68 °F, dew point 32 °F - Altimeter: 30.09 inHg - Observed at: KPBF ## 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 20110311003949A](https://openairdocs.org/incident/20110311003949A), Mar 11, 2011: Ayres Corporation S2R-T34, Altheimer, AR, Destroyed. On March 11, 2011, at 1800 CST, a thrush Ayres-S2-R, registered to swan lake flying service, inc, collided with a power pole on landing at swan lake flying… ## Docket (1 files) The files NTSB released with the investigation on April 4, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=78545. 469 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 469 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40345805&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.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.