# NTSB GAA19CA313: Cessna 150, N8685S, Renton, WA, June 4, 2019 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: June 4, 2019, 15:00 local (22:00 UTC) - Place: Renton, WA - Coordinates: 47.493057, -122.215835 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=47.4931&lon=-122.2158&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report November 6, 2019 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 99549 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA19CA313 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/99549/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=99549 - Page: https://openairdocs.org/ntsb/GAA19CA313 ## Probable cause The pilot receiving instruction's failure to maintain directional control and his overapplication of right rudder and the flight instructor's delayed remedial action during the landing, which resulted in a ground-loop. ## 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: [Cessna 150F, 14 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=2071814), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Student/instructed pilot (probable cause); cases with it: [Cessna 150F, 28 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2071814), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Instructor/check pilot (probable cause); cases with it: [Cessna 150F, 28 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2071814), [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: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Cessna 150F, 12 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2071814), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing: Attempted remediation/recovery](https://openairdocs.org/ntsb-events/060); cases with it: [Cessna 150F, 6 cases](https://openairdocs.org/ntsb-events/060/sequence.md?model=2071814), [All aircraft, 1,422 cases](https://openairdocs.org/ntsb-events/060/sequence.md) - [Landing: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Cessna 150F, 6 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=2071814), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) - [Landing: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Cessna 150F, 39 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=2071814), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The flight instructor in the tailwheel-equipped airplane reported that, after landing, the airplane veered left. In an attempt to correct back to centerline, the pilot receiving instruction applied full right rudder. The instructor immediately applied full left rudder and brake to prevent a ground-loop, but the airplane ground looped to the right, the left main landing gear collapsed, and the left wing impacted the ground. The airplane sustained substantial damage to the left wing. The instructor reported that a Federal Aviation Administration inspector examined the airplane's systems and found no anomalies. The airport's automated weather observation station reported that, about the time of the accident, the wind was variable at 3 knots. The pilot landed the airplane on runway 34. ## Factual narrative The flight instructor giving instruction in a tailwheel-equipped airplane reported that, after landing, the airplane started veering to the left. In an attempt to correct back to centerline, the pilot receiving instruction applied full right rudder. The flight instructor immediately applied full left rudder and brake to stop the impending ground loop. The airplane ground looped to the right, the left main landing gear collapsed, and the left wing impacted the ground. The airplane sustained substantial damaged to the left wing. The flight instructor reported that the Federal Aviation Administration inspector examined the airplane's systems, which revealed no anomalies. The automated weather observation station located on the airport reported that, about the time of the accident, the wind was variable at 3 knots. The airplane landed on runway 34. ## Aircraft - Registration: [N8685S](https://openairdocs.org/deregistered/N8685S-2020-10-31), registration cancelled 2020-10-31, S/N 15061985, built 1965 (OpenAirDocs) - Reported make and model: Cessna 150 (F) - Registry model: [Cessna 150F](https://openairdocs.org/model/cessna-150f) (registry code 2071814) (OpenAirDocs) - Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 15061985 - Year built: 1965 - Airframe hours: 2960 - Engines: Lycoming O-320-E2D 150 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, February 7, 2019 - Departed: BFI, Seattle, WA - Destination: BFI, Seattle, WA - Airport: RNT, Renton Muni, runway 34, 5,382 × 200 ft, concrete - Equipment: Electronic flight bag or handheld device, Stall warning system ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 39; injuries: none; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, without waivers/limitations; last flight review October 29, 2018; seat: left; flight hours: 594 total, 2 in this make and model, 541 as pilot in command, 72 in the last 90 days, 30 in the last 30 days, 2 in the last 24 hours - Flight instructor; age 32; injuries: none; flight instructor, military, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review August 12, 2017; seat: right; restraint: 3-point; flight hours: 2,049 total, 4 in this make and model, 1,757 as pilot in command, 113 in the last 90 days, 42 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 3 knots - Visibility: 6 statute miles - Lowest ceiling: none - Temperature: 70 °F, dew point 34 °F - Altimeter: 30.12 inHg - Observed at: KRNT ## 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 20190604005659A](https://openairdocs.org/incident/20190604005659A), Jun 4, 2019: Cessna 150F, Renton, WA, Substantial damage. Instructor pilot (PIC) was providing tail wheel instruction to another rated pilot. PIC noted the students approach and touchdown were satisfactory and… ## Docket (2 files) The files NTSB released with the investigation on July 2, 2019, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=99549. 1.2 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 889 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40473861&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Accident Photo (item 2, .PDF, 262 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40473862&FileExtension=.PDF&FileName=Accident%20Photo-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.