# Main gear strut/axle/truck - Type: NTSB finding subsection - Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft systems](https://openairdocs.org/ntsb-findings/0102) › [Landing gear system](https://openairdocs.org/ntsb-findings/010232) › Main gear strut/axle/truck - NTSB code: 01023213 - Cases: 86 - In the probable cause: 77 - Fatal cases: 0 - All cases: https://openairdocs.org/ntsb-findings/01023213/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01023213/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/01023213 ## Cases per year (in the probable cause / all) - 2008: 8 / 11 - 2009: 7 / 8 - 2010: 3 / 4 - 2011: 3 / 4 - 2012: 7 / 8 - 2013: 1 / 2 - 2014: 5 / 5 - 2015: 2 / 2 - 2016: 5 / 5 - 2017: 4 / 4 - 2018: 7 / 7 - 2019: 5 / 5 - 2021: 2 / 2 - 2022: 2 / 3 - 2023: 4 / 4 - 2024: 4 / 4 - 2025: 4 / 4 - 2026: 4 / 4 ## Defining events in these cases - [Landing gear collapse](https://openairdocs.org/ntsb-events/094): 36 cases - [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 15 cases - [Part(s) separation from AC](https://openairdocs.org/ntsb-events/338): 9 cases - [Loss of control on ground](https://openairdocs.org/ntsb-events/230): 7 cases - [Aircraft structural failure](https://openairdocs.org/ntsb-events/337): 5 cases - [Ground resonance](https://openairdocs.org/ntsb-events/232): 5 cases - [Hard landing](https://openairdocs.org/ntsb-events/092): 3 cases - [Landing area undershoot](https://openairdocs.org/ntsb-events/370): 1 cases - [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 1 cases - [Runway excursion](https://openairdocs.org/ntsb-events/300): 1 cases ## Aircraft models (registry) - [Schweizer 269C-1](https://openairdocs.org/model/schweizer-269c-1): 2 cases - [Schweizer 269C](https://openairdocs.org/model/schweizer-269c): 2 cases - [Piper PA-28-161](https://openairdocs.org/model/piper-pa-28-161): 2 cases - [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150): 2 cases - [Aeronca 7AC](https://openairdocs.org/model/aeronca-7ac): 2 cases - [Cessna 182](https://openairdocs.org/model/cessna-182): 2 cases - [Cessna 180](https://openairdocs.org/model/cessna-180): 2 cases - [Cessna 140](https://openairdocs.org/model/cessna-140): 2 cases - [Flight Design CTSW](https://openairdocs.org/model/flight-design-ctsw): 2 cases - [Waco ASO](https://openairdocs.org/model/waco-aso): 1 cases ## Other findings in the same cases - [Directional control](https://openairdocs.org/ntsb-findings/01062020) (Aircraft): 20 cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 12 cases - [Main landing gear](https://openairdocs.org/ntsb-findings/01023210) (Aircraft): 7 cases - [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 4 cases - [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 4 cases - [Scheduled/routine inspection](https://openairdocs.org/ntsb-findings/02061520) (Personnel issues): 4 cases - [Landing flare](https://openairdocs.org/ntsb-findings/01062041) (Aircraft): 4 cases - [Equipment manufacture](https://openairdocs.org/ntsb-findings/04013010) (Organizational issues): 3 cases - [Crosswind](https://openairdocs.org/ntsb-findings/03034040) (Environmental issues): 3 cases - [Runway/land/takeoff/taxi surface, general](https://openairdocs.org/ntsb-findings/03023000) (Environmental issues): 3 cases ## Newest cases - [NTSB ERA26LA280](https://openairdocs.org/ntsb/ERA26LA280), Jul 24, 2026: Waco ASO (N119Y), Hamilton, OH, substantial damage. Probable cause: The separation of the right main landing gear axle, which resulted in a loss of control during the landing roll. - [NTSB ERA26LA189](https://openairdocs.org/ntsb/ERA26LA189), Apr 24, 2026: Piper PA-34-220T (N6XT), Kissimmee, FL, substantial damage. Probable cause: Fracture of the left main landing gear trunnion during landing, which resulted in a loss of directional control during landing and subsequent runway excursion. - [NTSB CEN26LA161](https://openairdocs.org/ntsb/CEN26LA161), Apr 7, 2026: Flight Design Ctsw (N249CT), Seguin, TX, substantial damage. Probable cause: The failure of the landing gear weldment that resulted in separation of the right main landing gear. - [NTSB ANC26LA022](https://openairdocs.org/ntsb/ANC26LA022), Mar 28, 2026: Cessna A185F (N94237), Skwentna, AK, substantial damage. Probable cause: The pilot’s loss of directional control during landing roll due to contact with wind hardened snow berm and subsequent failure of main landing gear. - [NTSB CEN25LA402](https://openairdocs.org/ntsb/CEN25LA402), Sep 25, 2025: Textron 525C (N361MB), Baton Rouge, LA, substantial damage. Probable cause: The improper installation of the trunnion pin, which resulted in a failure of the right main landing gear. Contributing to the accident was the failure of maintenance personnel to follow the aircraft… - [NTSB WPR25LA300](https://openairdocs.org/ntsb/WPR25LA300), Sep 1, 2025: Aeronca 7AC (N82003), Firebaugh, CA, substantial damage. Probable cause: A loss of directional control during landing due to the partial separation of the right main landing gear oleo strut from a failed weld. - [NTSB CEN25LA185](https://openairdocs.org/ntsb/CEN25LA185), May 22, 2025: Cessna 401 (N3239Q), Arlington, TX, substantial damage. Probable cause: The failure of the left landing gear system and subsequent intentional gear up landing. - [NTSB CEN25LA089](https://openairdocs.org/ntsb/CEN25LA089), Jan 27, 2025: Luscombe 8E (N1739K), Brush, CO, substantial damage. Probable cause: The failure of the left main landing gear forward strut. - [NTSB ERA24LA325](https://openairdocs.org/ntsb/ERA24LA325), Jul 23, 2024: Flight Design Ctsw (N504CT), Cuba, NY, substantial damage. Probable cause: A separation of the left main landing gear wheel assembly during landing. - [NTSB CEN24LA251](https://openairdocs.org/ntsb/CEN24LA251), Jul 4, 2024: Cessna 170 (N9793A), Dowagiac, MI, substantial damage. Probable cause: The pilot and flight instructor’s failure to maintain directional control during the landing roll, which resulted in a ground loop with the left main landing gear axle failing, a runway excursion,… NTSB has coded findings and defining events since 2008; earlier cases used its older occurrence and cause codes and aren't counted. Findings: https://openairdocs.org/ntsb-findings.md. Defining events: https://openairdocs.org/ntsb-events.md. Phases of flight: https://openairdocs.org/ntsb-phases.md. Every investigation, filtered by finding, event, phase, state, year or model: https://openairdocs.org/ntsb.md (for example ?state=MI&fatal=1). NTSB's definitions: Accident and incident, 49 CFR 830.2 (https://www.ecfr.gov/current/title-49/subtitle-B/chapter-VIII/part-830/subpart-A/section-830.2), CICTT occurrence categories (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/OccurrenceCategoryDefinitions.pdf), CICTT phases of flight (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/PhaseofFlightDefinitions.pdf), and NTSB coding manual, before 2008 (PDF) (https://www.ntsb.gov/GILS/Documents/codman.pdf). NTSB publishes no definitions for its findings, only their names. --- 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.