# NTSB WPR10LA274: Smithwick/Treidel Tukan, N7513W, Prairie, ID, May 30, 2010 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: May 30, 2010, 08:39 local (14:39 UTC) - Place: Prairie, ID - Coordinates: 43.499443, -115.544441 - Nearby events: https://openairdocs.org/map.md?lat=43.4994&lon=-115.5444&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff: Loss of control in flight](https://openairdocs.org/ntsb-events/240) - Highest injury: Serious injuries - Injuries: 2 serious - Status: Completed, report January 7, 2011 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration FSDO - NTSB case key (mKey): 76190 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR10LA274 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/76190/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=76190 - Page: https://openairdocs.org/ntsb/WPR10LA274 ## Probable cause The pilot's loss of control of the weight-shift-controlled airplane during takeoff for undetermined reasons. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Smithwick P/Treidel M TUKAN, 1 case](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=05901LU), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) - [Object/animal/substance: tree(s)](https://openairdocs.org/ntsb-findings/03022020): Environmental issues › Physical environment · Contributed to outcome; cases with it: [Smithwick P/Treidel M TUKAN, 1 case](https://openairdocs.org/ntsb-findings/03022020/cases.md?model=05901LU), [All aircraft, 933 cases](https://openairdocs.org/ntsb-findings/03022020/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Takeoff: Loss of control in flight](https://openairdocs.org/ntsb-events/240) (defining event); cases with it: [Smithwick P/Treidel M TUKAN, 1 case](https://openairdocs.org/ntsb-events/240/sequence.md?model=05901LU), [All aircraft, 5,002 cases](https://openairdocs.org/ntsb-events/240/sequence.md) ## Analysis According to witness accounts, the unlicensed pilot of the experimental weight-shift-controlled airplane was performing practice takeoffs and landings. During the last departure the airplane banked to the left and collided with trees. Global Positioning System (GPS) flight track data recovered from a handheld GPS device within the airplane (which did not include altitude information) indicated that this turn was flown at a rate and groundspeed comparable to the prior turns performed during the flight. The data further revealed that a few seconds after the final turn the airplane made an abrupt course reversal back to the runway; however, this sudden change of heading was more than likely a GPS anomaly. The pilot did not provide either a written or verbal statement to the NTSB and did not respond to multiple requests to make the airplane or engine available for examination. ## Factual narrative HISTORY OF FLIGHT On May 30, 2010, at 0839 mountain daylight time, a Smithwick/Treidel, Tukan, N7513W, collided with trees during takeoff from the Smith Prairie Airport, Prairie, Idaho. The unlicensed 52-year-old pilot was operating the experimental weight-shift-controlled airplane under the provisions of Title 14 Code of Federal Regulations (CFR) Part 91. The pilot and passenger sustained serious injuries. The airplane sustained substantial damage to the wings and cabin structure. The local flight departed Smith Prairie at 0816. Visual meteorological conditions prevailed, and no flight plan had been filed. According to witnesses, the accident pilot and passenger had been performing practice takeoffs and landings during the accident flight. Having completed a touch-and-go takeoff, the airplane was observed to veer left to the north and impact trees. The airplane came to rest in the trees about 170 feet north of the runway centerline, 25 feet above ground level. A handheld global positioning systems (GPS) Garmin GPS III was recovered from the airplane. The unit did not record altitude information. Data extraction revealed that the airplane departed, and flew a track consistent with multiple approaches and touch-and-go takeoffs in both directions on the accident runway. During the last departure, the airplane continued on a runway heading of 050 degrees, covering a distance of about 400 feet in 6 seconds. Over the next 4 seconds it turned left onto a heading of about 040 degrees true, traveling about 280 feet. The rate of turn and groundspeed data appeared comparable with the prior turns performed during the flight. The airplane then continued on a northbound track for the next 6 seconds covering a distance of 475 feet; the next and final recorded GPS fix occurred 28 seconds later, 530 feet to the south, with the airplane wreckage located 30 feet south of this position. The closest official weather station, located 35 miles southwest of the accident site at Mountain Home Air Force Base, reported at 0855, clear skies, calm winds, with a visibility of 10 miles. Review of Federal Aviation Administration (FAA) records, indicated that the airplane was equipped with a two-stroke Rotax 582 series engine. Despite numerous attempts, the pilot did not provide either a written statement, or a copy of the NTSB Pilot/Operator Aircraft Accident Report, Form 6120.1/2. Additionally, the pilot did not respond to multiple requests to make the airplane or engine available for examination by the National Transportation Safety Board or the FAA. ## Aircraft - Registration: [N7513W](https://openairdocs.org/deregistered/N7513W-2017-06-19), registration cancelled 2017-06-19, S/N MT 001, built 1999 (OpenAirDocs) - Reported make and model: SMITHWICK/TREIDEL TUKAN - Registry model: [Smithwick P/Treidel M TUKAN](https://openairdocs.org/model/smithwick-p-treidel-m-tukan) (registry code 05901LU) (OpenAirDocs) - Registry engine: [Rotax 582SER](https://openairdocs.org/engine/rotax-582ser) (registry code 55556, 2 cycle) (OpenAirDocs) - Category: Airplane - Serial number: MT 001 - Engines: ROTAX 582 65 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Chezem Daniel R - Registered owner: Chezem Daniel R - Airworthiness certificate: Special, Experimental (Special) - Departed: 2U0, Prairie, ID - Destination: 2U0, Prairie, ID - Airport: 2U0, Smith Prairie, runway 05, 5,400 × 150 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 52; injuries: serious ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 50 °F, dew point 45 °F - Altimeter: 30.15 inHg - Observed at: MUO, 31 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 20100530005349A](https://openairdocs.org/incident/20100530005349A), May 30, 2010: Smithwick P TUKAN, Smith Prairie, ID, Destroyed. The weight-shift sport pilot aircraft was observed doing touch and go's. a short time later a witness noticed the aircraft was stuck in a 20' tree located 172'… ## Docket (6 files) The files NTSB released with the investigation on September 28, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=76190. - GPS Flight Track Data (item 1, .TXT): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40334971&FileExtension=.txt&FileName=GPS%20Flight%20Track%20Data-Master.txt - Image 1 - GPS Flight Track (item 2, .PDF, 416 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40334841&FileExtension=.PDF&FileName=Image%201%20-%20GPS%20Flight%20Track-Master.PDF - Image 2 - GPS Flight Track (item 3, .PDF, 155 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40334975&FileExtension=.PDF&FileName=Image%202%20-%20GPS%20Flight%20Track-Master.PDF - Photo 1 – Airplane With Runway In Foreground (item 4, .PDF, 677 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40334843&FileExtension=.PDF&FileName=Photo%201%20%E2%80%93%20Airplane%20With%20Runway%20In%20Foreground-Master.PDF - Photo 2 - Airplane In Tree (item 5, .PDF, 872 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40334844&FileExtension=.PDF&FileName=Photo%202%20-%20Airplane%20In%20Tree-Master.PDF - Photo 3 - Airplane In Tree (item 6, .PDF, 1.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40334845&FileExtension=.PDF&FileName=Photo%203%20-%20Airplane%20In%20Tree-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.