# Land gear sys wiring - 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) › Land gear sys wiring - NTSB code: 01023297 - Cases: 9 - In the probable cause: 9 - Fatal cases: 1 - All cases: https://openairdocs.org/ntsb-findings/01023297/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01023297/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/01023297 ## Cases per year (in the probable cause / all) - 2009: 2 / 2 - 2010: 1 / 1 - 2016: 1 / 1 - 2017: 1 / 1 - 2019: 1 / 1 - 2023: 1 / 1 - 2024: 1 / 1 - 2025: 1 / 1 ## Defining events in these cases - [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 3 cases - [Landing gear collapse](https://openairdocs.org/ntsb-events/094): 3 cases - [Runway excursion](https://openairdocs.org/ntsb-events/300): 1 cases - [Loss of control on ground](https://openairdocs.org/ntsb-events/230): 1 cases - [Abnormal runway contact](https://openairdocs.org/ntsb-events/090): 1 cases ## Aircraft models (registry) - [Piper PA-28R-201](https://openairdocs.org/model/piper-pa-28r-201): 2 cases - [Saab-Scania 2000](https://openairdocs.org/model/saab-scania-2000): 1 cases - [Piper PA-30](https://openairdocs.org/model/piper-pa-30): 1 cases - [Boeing 757-236](https://openairdocs.org/model/boeing-757-236): 1 cases - [Beech C90A](https://openairdocs.org/model/beech-c90a): 1 cases - [Beech 58](https://openairdocs.org/model/beech-58): 1 cases - [Beech C35](https://openairdocs.org/model/beech-c35): 1 cases ## Other findings in the same cases - [Use of checklist](https://openairdocs.org/ntsb-findings/02063030) (Personnel issues): 2 cases - [Repair](https://openairdocs.org/ntsb-findings/02062015) (Personnel issues): 2 cases - [Incomplete action](https://openairdocs.org/ntsb-findings/02041040) (Personnel issues): 2 cases - [Oversight of operation](https://openairdocs.org/ntsb-findings/04032015) (Organizational issues): 1 cases - [Policy/procedure, general](https://openairdocs.org/ntsb-findings/04021000) (Organizational issues): 1 cases - [Equipment design](https://openairdocs.org/ntsb-findings/04011010) (Organizational issues): 1 cases - [Tailwind](https://openairdocs.org/ntsb-findings/03034015) (Environmental issues): 1 cases - [Airport facilities/design, general](https://openairdocs.org/ntsb-findings/03017000) (Environmental issues): 1 cases - [Installation](https://openairdocs.org/ntsb-findings/02062035) (Personnel issues): 1 cases - [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 1 cases ## Newest cases - [NTSB WPR25LA122](https://openairdocs.org/ntsb/WPR25LA122), Mar 16, 2025: Beech C90A (N513JM), Helena, MT, substantial damage. Probable cause: The failure of the left main landing gear to fully extend and lock as a result of broken downlock switch wires and the failure of the pilots to complete the manual gear extension checklist. - [NTSB ERA24LA376](https://openairdocs.org/ntsb/ERA24LA376), Sep 8, 2024: Beech 58 (N6037M), Raleigh, NC, substantial damage. Probable cause: Damage to the landing gear selector switch wire bundle which resulted in an inadvertent retraction of the landing gear during the takeoff roll. - [NTSB DCA24FA002](https://openairdocs.org/ntsb/DCA24FA002), Oct 5, 2023: Boeing 757-236 (N977FD), Chattanooga, TN, substantial damage. Probable cause: The failure of the alternate gear extension system, which prevented the landing gear from being lowered. The cause of the system failure was a broken wire, due to tensile overload, between the… - [NTSB DCA20MA002](https://openairdocs.org/ntsb/DCA20MA002), Oct 18, 2019: Saab 2000 (N686PA), Unalaska, AK, substantial damage, 1 fatal. Probable cause: The landing gear manufacturer’s incorrect wiring of the wheel speed transducer harnesses on the left main landing gear during overhaul. The incorrect wiring caused the antiskid system not to function… - [NTSB CEN17LA150](https://openairdocs.org/ntsb/CEN17LA150), Apr 9, 2017: Piper PA 28R-201 (N36458), Pontiac, MI, substantial damage. Probable cause: Maintenance personnel’s improper securing of an unused instrument lamp socket during recent maintenance, which resulted in an electrical short of the landing gear controls and stopped the landing… - [NTSB CEN16LA374](https://openairdocs.org/ntsb/CEN16LA374), Sep 13, 2016: Piper PA-28R-201 (N786BG), Bowling Green, OH, substantial damage. Probable cause: The pilots’ failure to complete the Emergency Landing Gear Extension checklist and maintenance personnel’s failure to correctly repair spliced wires on the left main landing gear down limit switch,… - [NTSB ERA10LA103](https://openairdocs.org/ntsb/ERA10LA103), Jan 2, 2010: Fairchild SA227 (N227ML), Somerset, KY, substantial damage. Probable cause: Damaged wiring in the nosewheel steering harness, which resulted in a loss of control during landing. Contributing to the accident was the pilots' improper touchdown point. - [NTSB WPR09LA372](https://openairdocs.org/ntsb/WPR09LA372), Jul 22, 2009: Piper PA-30 (N7504Y), Walla Walla, WA, substantial damage. Probable cause: A tripped landing gear motor circuit breaker, which prevented the gear from fully locking in the down position, and subsequent collapse during landing. Contributing to the accident was the disabled… - [NTSB CEN09CA307](https://openairdocs.org/ntsb/CEN09CA307), May 19, 2009: Beech C35 (N1945D), Englewood, CO, substantial damage. Probable cause: The collapse of the landing gear due to the mechanic's failure to properly wire the landing gear squat switch. 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.