# Gear extension and retract sys - 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) › Gear extension and retract sys - NTSB code: 01023230 - Cases: 418 - In the probable cause: 397 - Fatal cases: 11 - All cases: https://openairdocs.org/ntsb-findings/01023230/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01023230/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/01023230 ## Cases per year (in the probable cause / all) - 2008: 17 / 19 - 2009: 21 / 22 - 2010: 18 / 19 - 2011: 18 / 18 - 2012: 17 / 19 - 2013: 15 / 15 - 2014: 18 / 19 - 2015: 20 / 20 - 2016: 24 / 25 - 2017: 15 / 15 - 2018: 25 / 27 - 2019: 26 / 27 - 2020: 19 / 21 - 2021: 23 / 23 - 2022: 14 / 14 - 2023: 23 / 26 - 2024: 33 / 37 - 2025: 35 / 36 - 2026: 16 / 16 ## Defining events in these cases - [Landing gear not configured](https://openairdocs.org/ntsb-events/095): 229 cases - [Landing gear collapse](https://openairdocs.org/ntsb-events/094): 84 cases - [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 55 cases - [Electrical system malf/failure](https://openairdocs.org/ntsb-events/332): 12 cases - [Abnormal runway contact](https://openairdocs.org/ntsb-events/090): 6 cases - [Miscellaneous/other](https://openairdocs.org/ntsb-events/900): 5 cases - [Nose over/nose down](https://openairdocs.org/ntsb-events/096): 4 cases - [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 3 cases - [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 3 cases - [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 2 cases ## Aircraft models (registry) - [Piper PA-24-250](https://openairdocs.org/model/piper-pa-24-250): 14 cases - [Piper PA-30](https://openairdocs.org/model/piper-pa-30): 12 cases - [Cessna P210N](https://openairdocs.org/model/cessna-p210n): 12 cases - [Beech 58](https://openairdocs.org/model/beech-58): 11 cases - [Cessna T210L](https://openairdocs.org/model/cessna-t210l): 10 cases - [Cessna R182](https://openairdocs.org/model/cessna-r182): 10 cases - [Cessna 172RG](https://openairdocs.org/model/cessna-172rg): 10 cases - [Piper PA-44-180](https://openairdocs.org/model/piper-pa-44-180): 8 cases - [Beech A36](https://openairdocs.org/model/beech-a36): 8 cases - [Piper PA-28R-200](https://openairdocs.org/model/piper-pa-28r-200): 7 cases ## Other findings in the same cases - [Forgotten action/omission](https://openairdocs.org/ntsb-findings/02041035) (Personnel issues): 153 cases - [Use of equip/system](https://openairdocs.org/ntsb-findings/02063015) (Personnel issues): 107 cases - [Use of checklist](https://openairdocs.org/ntsb-findings/02063030) (Personnel issues): 72 cases - [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 35 cases - [Lack of action](https://openairdocs.org/ntsb-findings/02041030) (Personnel issues): 34 cases - [Task monitoring/vigilance](https://openairdocs.org/ntsb-findings/02021520) (Personnel issues): 27 cases - [Attention](https://openairdocs.org/ntsb-findings/02021510) (Personnel issues): 24 cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 17 cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 15 cases - [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 14 cases ## Newest cases - [NTSB WPR26LA311](https://openairdocs.org/ntsb/WPR26LA311), Aug 21, 2026: Cessna T210M (N761WT), Logan, UT, substantial damage. Probable cause: The pilot’s failure to extend the airplane’s landing gear before landing. - [NTSB WPR26LA308](https://openairdocs.org/ntsb/WPR26LA308), Aug 15, 2026: Mitsubishi MU-2B-40 (N5LC), Norton Shores, MI, substantial damage. Probable cause: The pilot’s failure to extend the landing gear before landing. - [NTSB ERA26LA265](https://openairdocs.org/ntsb/ERA26LA265), Jun 27, 2026: Beech E35 (N3272C), Lincoln, AL, substantial damage. Probable cause: The pilot’s failure to ensure that the landing gear were extended prior to landing. - [NTSB CEN26LA240](https://openairdocs.org/ntsb/CEN26LA240), Jun 24, 2026: Beech 58 (N96GB), Traverse City, MI, substantial damage. Probable cause: The pilot’s failure to extend the landing gear before landing. - [NTSB ERA26LA235](https://openairdocs.org/ntsb/ERA26LA235), May 23, 2026: Piper PA-24-250 (N5376P), Bartow, FL, substantial damage. Probable cause: The pilot’s failure to extend the landing gear before landing. - [NTSB CEN26LA188](https://openairdocs.org/ntsb/CEN26LA188), May 13, 2026: Piper PA-34-220T (N6915Z), Corpus Christi, TX, substantial damage. Probable cause: The pilot's failure to extend the main landing gear prior to landing, which resulted in a gear up landing. Contributing to the accident was the pilot’s distraction during the approach. - [NTSB WPR26LA171](https://openairdocs.org/ntsb/WPR26LA171), Apr 25, 2026: Cessna 210 (N6130F), Redding, CA, substantial damage. Probable cause: The pilot’s failure to extend the landing gear before landing due to distraction and his failure to conduct the before landing checklist. - [NTSB ERA26LA182](https://openairdocs.org/ntsb/ERA26LA182), Apr 17, 2026: Donald E Johnston Velocity XL-RG (N621CM), Crestview, FL, substantial damage. Probable cause: The pilot’s failure to extend the landing gear before landing. - [NTSB ERA26LA173](https://openairdocs.org/ntsb/ERA26LA173), Apr 11, 2026: Beech 58 (N38020), Stevensville, MD, substantial damage. Probable cause: The pilot’s inadvertent retraction of the landing gear lever during the landing roll, which resulted in a gear collapse and runway excursion. - [NTSB ERA26LA150](https://openairdocs.org/ntsb/ERA26LA150), Mar 14, 2026: Piper PA-24-260 (N9024P), Athens, GA, substantial damage. Probable cause: The pilot’s failure to extend the landing gear before landing. 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.