# NTSB WPR11CA222: Thrush S2R-T34, N510CW, Pleasant Grove, CA, May 11, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: May 11, 2011, 13:00 local (20:00 UTC) - Place: Pleasant Grove, CA - Coordinates: 38.851112, -121.574996 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=38.8511&lon=-121.5750&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report August 3, 2011 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 79094 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR11CA222 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/79094/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=79094 - Page: https://openairdocs.org/ntsb/WPR11CA222 ## Probable cause The pilot's failure to maintain directional control during the landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Thrush S2R-T34, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=8380307), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Wind: tailwind](https://openairdocs.org/ntsb-findings/03034015): Environmental issues › Conditions/weather/phenomena · Contributed to outcome; cases with it: [Thrush S2R-T34, 1 case](https://openairdocs.org/ntsb-findings/03034015/cases.md?model=8380307), [All aircraft, 594 cases](https://openairdocs.org/ntsb-findings/03034015/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Thrush S2R-T34, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=8380307), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Thrush S2R-T34, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=8380307), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Thrush S2R-T34, 1 case](https://openairdocs.org/ntsb-events/300/sequence.md?model=8380307), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) - [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Thrush S2R-T34, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=8380307), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot stated that he had just completed spraying a field and was landing to the north with what he estimated to be a 12-mile-per-hour tailwind. As the airplane touched down on the main wheels with the tailwheel off the ground, the airplane began to veer to the left. The pilot attempted to correct the airplane back toward the runway, but it continued to veer left towards a berm. He added full power to attempt to abort the landing, but collided with a trailer near the departure end of the runway. The nearest weather reporting station, located about 8.5 nautical miles south of the accident site, reported wind from 180 degrees at 16 knots at the time of the accident. The pilot reported that there were no preimpact mechanical malfunctions or failures of the airframe or engine that would have precluded normal flight. The pilot stated that the reloading and refueling equipment is located at the north end of the airstrip and that they always land to the north and take off to the south to save time. ## Factual narrative The pilot stated that he had just completed spraying a field and was landing to the north with what he estimated to be a 12 mile per hour tailwind. As the airplane touched down on the main wheels with the tailwheel off the ground, the airplane began to veer to the left. The pilot attempted to correct the airplane back toward the runway, but it continued to veer left towards a berm. He added full power to attempt to abort the landing, but collided with a trailer near the departure end of the runway. At the time of the accident, the nearest weather reporting station, located about 8.5 nm to the south of the accident site reported wind from 180 degrees at 16 knots. The pilot reported that there were no preimpact mechanical malfunctions or failures of the airframe or engine that would have precluded normal flight. The pilot noted that the reloading and refueling equipment is located at the north end of the airstrip and they always land to the north and takeoff to the south to save time. ## Aircraft - Registration: [N510CW](https://openairdocs.org/deregistered/N510CW-2014-11-25), registration cancelled 2014-11-25, S/N T34-277, built 2006 (OpenAirDocs) - Reported make and model: THRUSH AIRCRAFT INC S2R-T34 - Registry model: [Thrush S2R-T34](https://openairdocs.org/model/thrush-s2r-t34) (registry code 8380307) (OpenAirDocs) - Registry engine: [Pratt & Whitney PT6A series](https://openairdocs.org/engine/pratt-whitney-pt6a-series) (registry code 52034, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: T34-277 - Engines: P&W PT6A SERIES 500 horsepower turbo prop - Damage: Substantial damage - Flight: Aerial application, Part 137 - Operator: Farm Air Flying Services Inc. - Registered owner: Farm Air Flying Services Inc. - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, April 30, 2011 - Departed: pvt, Pleasant Grove, CA - Destination: pvt, Pleasant Grove, CA - Airport: pvt, West Catlet Private Airstrip, runway 36, 2,400 × 60 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 49; injuries: none; commercial; airplane ratings: single-engine land; medical: class 2, without waivers/limitations; last flight review September 1, 2009; seat: single; flight hours: 8,428 total, 879 in this make and model, 8,305 as pilot in command, 140 in the last 90 days, 95 in the last 30 days, 8 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 166° at 16 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 66 °F, dew point 48 °F - Altimeter: 29.97 inHg - Observed at: SMF, 85 nm away ## 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 20110511008279A](https://openairdocs.org/incident/20110511008279A), May 11, 2011: Thrush Aircraft Inc S2R-T34, Pleasent Grove, CA, Substantial damage. Pilot reports crosswinds during landing rollout. Aircraft was unable to stop with braking or propeller reversing/beta. Attempted full power to go around but… ## Docket (2 files) The files NTSB released with the investigation on May 27, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=79094. 650 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 599 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40348348&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Record of Telephone Conversation - Pilot (item 2, .PDF, 51 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40347946&FileExtension=.PDF&FileName=Record%20of%20Telephone%20Conversation%20-%20Pilot-Master.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.