# NTSB CHI06CA018: Stinson 108-1, N8495K, Tea, SD, September 19, 2005 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: September 19, 2005, 18:00 local (23:00 UTC) - Place: Tea, SD - Coordinates: 43.4575, -96.80194 - Nearby events: https://openairdocs.org/map.md?lat=43.4575&lon=-96.8019&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report January 31, 2006 - Report: Approved by Office Director - Parties: Federal Aviation Administration - Rapid City FSDO - NTSB case key (mKey): 62771 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI06CA018 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/62771/pdf - Page: https://openairdocs.org/ntsb/CHI06CA018 ## Probable cause The pilot's failure to maintain directional control during the landing rollout which resulted in the encountered ground loop. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, landing - roll - directional control - not maintained, pilot in command (cause) - ground loop/swerve - encountered, pilot in command (cause) - On ground/water encounter with terrain/water, landing - roll - terrain condition - ground ## Analysis The airplane ground looped during the landing roll. The student pilot was flying solo at the time of the accident. The pilot reported that his first landing was "non-eventful" and that the airplane "performed well." The accident occurred on the second landing attempt. The pilot stated that during the landing rollout the airplane began "pulling very hard to the right" shortly after he "touched both brakes simultaneously... to slow the aircraft." The pilot reported that the "pull to the right was so strong that the aircraft began heading toward the side of the runway at about a 35 degree angle from [the runway] centerline." The pilot stated that he heard the "squeal of brakes" although he was "not applying brakes" while the airplane veered to the right. The pilot reported that he applied "hard left rudder" in an attempt to realign the airplane with the runway centerline. The pilot stated that the right landing main landing gear collapsed and the right wingtip impacted the ground. There were multiple tire tracks associated with the ground track of the airplane during the accident. These tire tracks were left by both the left and right main landing gear tires. The initial tire track was consistent with being left by the left main landing gear, arcing to the left. Next, there were two tire tracks marks, arcing to the right. These markings were consistent with being left by both the left and right main landing gear. The subsequent ground markings and tire track marks indicate the airplane ground looped to the left, with the right wing striking the terrain and the right main landing gear collapsing under the fuselage. No anomalies were detected with either brake system, and no discrepancies were noted during operational tests. ## Factual narrative This report is based on information received by the NTSB. Additional details may be found in the NTSB's public docket for this case. For further information, please contact the NTSB Office of Public Inquiries ## Aircraft - Registration: [N8495K](https://openairdocs.org/aircraft/N8495K), registered now, S/N 108-1495, built 1947 (OpenAirDocs) - Reported make and model: Stinson 108-1 - Registry model: [Stinson 108-1](https://openairdocs.org/model/stinson-108-1) (registry code 9230404) (OpenAirDocs) - Registry engine: [Lycoming 0-435](https://openairdocs.org/engine/lycoming-0-435) (registry code 41516, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 108-1495 - Airframe hours: 2291.23 - Engines: Lycoming 0-435-1 190 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Airworthiness certificate: Standard, Utility; Standard, Normal - Last inspection: Annual, February 1, 2005, 18.2 hours before - Departed: Y14, Tea, SD - Destination: Y14, Tea, SD - Airport: Y14, Marv Skie - Lincoln County, runway 34, 3,650 × 60 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 40; injuries: none; student; medical: class 3, without waivers/limitations; seat: left; flight hours: 83 total, 22 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 310° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 73 °F, dew point 54 °F - Altimeter: 30.04 inHg - Observed at: FSD, 8 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 20050919034259A](https://openairdocs.org/incident/20050919034259A), Sep 19, 2005: Univar 1081, Sioux Falls, SD, Substantial damage. (-23) The student pilot was practicing landings at tea airport, SD on sept. 19, 2005. The pilot lost directional control of the airplane. The right main… ## Other investigations on N8495K (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 NYC92LA158](https://openairdocs.org/ntsb/NYC92LA158), Aug 13, 1992: Stinson ST-75 (N8495K), Sussex, NJ, substantial damage. Probable cause: THE PILOT FAILED TO MAINTAIN CONTROL OF THE AIRPLANE DURING THE LANDING ROLL, AND INADVERTENTLY SWERVED AND GROUND LOOPED INTO TWO PARKED AIRPLANES. A FACTOR IN THIS ACCIDENT WAS THE PILOT'S LACK OF… 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.