# NTSB CEN22LA371: Ayres S2R-T65, N9899, Wyman / Washington, IA, July 21, 2022 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: July 21, 2022, 06:15 local (11:15 UTC) - Place: Wyman / Washington, IA - Coordinates: 41.301408, -91.691642 - Nearby events: https://openairdocs.org/map.md?lat=41.3014&lon=-91.6916&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Defining event: [Maneuvering-low-alt flying: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Central Region - NTSB case key (mKey): 105694 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN22LA371 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/105694/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=105694 - Page: https://openairdocs.org/ntsb/CEN22LA371 ## Probable cause The pilot not maintaining sufficient altitude to clear an obstruction during the aerial application flight. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: altitude](https://openairdocs.org/ntsb-findings/01062012): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Ayres S2R-T65, 1 case](https://openairdocs.org/ntsb-findings/01062012/cases.md?model=0970109), [All aircraft, 1,310 cases](https://openairdocs.org/ntsb-findings/01062012/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Ayres S2R-T65, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=0970109), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Object/animal/substance: tower/antenna (incl guy wires)](https://openairdocs.org/ntsb-findings/03022017): Environmental issues › Physical environment · Effect on equipment; cases with it: [Ayres S2R-T65, 1 case](https://openairdocs.org/ntsb-findings/03022017/cases.md?model=0970109), [All aircraft, 55 cases](https://openairdocs.org/ntsb-findings/03022017/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Maneuvering-low-alt flying: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470) (defining event); cases with it: [Ayres S2R-T65, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=0970109), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot reported that while conducting agricultural spraying operations he first circled the field to be sprayed and noted a windmill at the south end of the field. He started to spray the field and when conducting a spray pass lined up with the windmill, he pulled up to clear the windmill, but encountered a “pocket of dead air” which resulted in the airplane hitting the windmill. The pilot returned to the airport and upon landing the airplane’s left main landing gear collapsed and the airplane went off the side of the runway. The airplane sustained substantial damage to its fuselage. The pilot reported that there were no mechanical malfunctions or failures of the airplane before the accident. ## Aircraft - Registration: [N9899](https://openairdocs.org/aircraft/N9899), registered now, S/N T65010DC, built 1990 (OpenAirDocs) - Reported make and model: AYRES CORPORATION S2R-T65 - Registry model: [Ayres S2R-T65](https://openairdocs.org/model/ayres-s2r-t65) (registry code 0970109) (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: T65010DC - Year built: 1990 - Engines: Pratt & Whitney PT6-65 turbo shaft - Damage: Substantial damage - Flight: Aerial application, Part 137 - Operator: Justin Rudd, doing business as Duke's Down Under Dusting - Registered owner: Grand Prairie Dusters Inc - Airworthiness certificate: Special, Restricted (Special) - Airport: AWG, Washington Muni ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 34; injuries: none; commercial; airplane ratings: single-engine land; medical: class 2, without waivers/limitations; last flight review March 12, 2021; seat: single; restraint: 4-point; flight hours: 4,300 total, 25 in this make and model, 4,300 as pilot in command, 105 in the last 90 days, 72 in the last 30 days, 6 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 7 knots - Visibility: 8 statute miles - Lowest ceiling: none - Temperature: 66 °F, dew point 64 °F - Altimeter: 29.83 inHg - Observed at: KAWG, 2 nm away - METAR: METAR KAWG 211055Z AUTO 27007KT 8SM CLR 19/18 A2983 RMK AO2= ## 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 20220721007589A](https://openairdocs.org/incident/20220721007589A), Jul 21, 2022: Ayres Corporation S2R-T65, Wyman, IA, Substantial damage. Aircraft struck windmill tower at the south edge of a farm field appx.15 sm sse of awg. Damage to the propeller,left main landing gear,firewall,and spray… ## Docket (2 files) The files NTSB released with the investigation on September 22, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=105694. 3.5 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 7 pages, 2.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14461038&FileExtension=pdf&FileName=NTSB%20REPORT_Redacted-Rel.pdf - Accident photos (item 2, PDF, 2 pages, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14462378&FileExtension=pdf&FileName=Photos-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.