# NTSB GAA18CA293: Cessna 150, N5999T, Bemidgi, MN, May 22, 2018 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: May 21, 2018, 19:20 local (May 22, 2018, 00:20 UTC) - Place: Bemidgi, MN - Coordinates: 47.510833, -94.934722 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=47.5108&lon=-94.9347&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: 1 uninjured - Status: Completed, report March 18, 2019 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 97310 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA18CA293 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/97310/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=97310 - Page: https://openairdocs.org/ntsb/GAA18CA293 ## Probable cause The student pilot’s failure to maintain lateral control of the airplane during the landing roll, which resulted in a side load and subsequent failure of the left main landing gear extension casting. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: lateral/bank control](https://openairdocs.org/ntsb-findings/01062023): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Cessna 150, 1 case](https://openairdocs.org/ntsb-findings/01062023/cases.md?model=2071802), [All aircraft, 390 cases](https://openairdocs.org/ntsb-findings/01062023/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 150, 7 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2071802), [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: Other weather encounter](https://openairdocs.org/ntsb-events/400); cases with it: [Cessna 150, 3 cases](https://openairdocs.org/ntsb-events/400/sequence.md?model=2071802), [All aircraft, 1,127 cases](https://openairdocs.org/ntsb-events/400/sequence.md) - [Landing: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Cessna 150, 8 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2071802), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing: Part(s) separation from AC](https://openairdocs.org/ntsb-events/338); cases with it: [Cessna 150, 1 case](https://openairdocs.org/ntsb-events/338/sequence.md?model=2071802), [All aircraft, 563 cases](https://openairdocs.org/ntsb-events/338/sequence.md) ## Analysis The student pilot reported that, during the landing roll, the airplane encountered a right crosswind gust, and the right wing lifted. He added that "the airplane sidestepped to the left and the left main landing gear wheel assembly separated, and the left-wing tip struck the ground." The left main landing gear strut contacted the runway surface, and the airplane skidded to a stop. The airplane sustained substantial damage to the left main landing gear attachment points. The METAR at the accident airport reported that, about the time of the accident, the wind was from 180° at 6 knots. The student landed the airplane on runway 13. The student reported that there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation. Photographs taken by the pilot during a postaccident examination revealed that an extension casting, which was part of the tailwheel conversion kit, failed where the two lower landing gear strut attachment bolts connect to the extension casting. ## Factual narrative The student pilot reported that during the landing roll, the airplane encountered a right crosswind gust, and the right wing lifted. "The airplane sidestepped to the left and the left main landing gear wheel assembly separated, and the left-wing tip struck the ground." The left main landing gear strut contacted the runway surface and the airplane skidded to a stop. The airplane sustained substantial damage to the left main landing gear attachment points. According to the METAR at the accident airport, about the time of the accident, the wind was reported as being from 180° at 6 knots. The pilot landed to runway 13. The pilot reported that there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation. Photographs taken by the pilot during a post-accident examination revealed that an extension casting, that was part of the tailwheel conversion kit, failed where the two lower landing gear strut attachment bolts connect to the extension casting. ## Aircraft - Registration: [N5999T](https://openairdocs.org/deregistered/N5999T-2019-08-05), registration cancelled 2019-08-05, S/N 15060699, built 1964 (OpenAirDocs) - Reported make and model: CESSNA 150 (D) - Registry model: [Cessna 150](https://openairdocs.org/model/cessna-150) (registry code 2071802) (OpenAirDocs) - Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 15060699 - Year built: 1964 - Airframe hours: 3461 - Engines: Continental O-200A 100 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Bemidji Flying Club Inc. - Registered owner: Bemidji Flying Club Inc. - Airworthiness certificate: Standard, Utility - Last inspection: Annual, June 27, 2017 - Departed: BJI, Bemidgi, MN - Destination: BJI, Bemidgi, MN - Airport: BJI, Bemidji Rgnl, runway 13, 7,004 × 150 ft, asphalt - Equipment: None ## Flight crew As NTSB recorded them. NTSB leaves out names. - Student pilot; age 65; injuries: none; student; medical: class 3, with waivers/limitations; seat: left; restraint: lap only; flight hours: 70 total, 67 in this make and model, 18 as pilot in command, 16 in the last 90 days, 5 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Dusk - Wind: 180° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 64 °F, dew point 41 °F - Altimeter: 30.00 inHg - Observed at: KBJI, 1 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 20180521024459A](https://openairdocs.org/incident/20180521024459A), May 21, 2018: Cessna 150, Bemidji, MN, Substantial damage. Aircraft ground looped on landing. Left landing gear wheel snapped at attachment due to side load. ## Other investigations on N5999T (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 MKC66D0526](https://openairdocs.org/ntsb/MKC66D0526), Mar 14, 1966: Cessna 150 (N5999T), Hibbing, MN, substantial damage ## Docket (3 files) The files NTSB released with the investigation on October 29, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=97310. 5.9 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 4.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467751&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Memorandum - Student Pilot (item 2, .PDF, 124 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467752&FileExtension=.PDF&FileName=Memorandum%20-%20Student%20Pilot-Master.PDF - Photos (item 3, .PDF, 3 photos, 1.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467753&FileExtension=.PDF&FileName=Photos-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.