# NTSB investigations: Land gear sys wiring

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB WPR25LA122](https://openairdocs.org/ntsb/WPR25LA122.md): Beech C90A · Helena, MT · Accident · No injuries · Class 3 · Limited · Final report · Mar 16, 2025 · N513JM · Substantial damage
  > 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.md): Beech 58 · Raleigh, NC · Accident · No injuries · Class 4 · Limited · Final report · Sep 8, 2024 · N6037M · Substantial damage
  > 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.md): Boeing 757-236 · Chattanooga, TN · Accident · No injuries · Class 2 · Field · Final report · Oct 5, 2023 · N977FD · Substantial damage
  > 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 alternate gear extend switch and the alternate extension power…
- [NTSB DCA20MA002](https://openairdocs.org/ntsb/DCA20MA002.md): Saab 2000 · Unalaska, AK · Accident · 1 fatal · Class 1 · Major · Final report · Oct 18, 2019 · N686PA · Substantial damage
  > 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 as intended, resulting in the failure of the left outboard…
- [NTSB CEN17LA150](https://openairdocs.org/ntsb/CEN17LA150.md): Piper PA 28R-201 · Pontiac, MI · Accident · No injuries · Limited investigation · Final report · Apr 9, 2017 · N36458 · Substantial damage
  > 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 gear while it was transitioning to the down position and led to…
- [NTSB CEN16LA374](https://openairdocs.org/ntsb/CEN16LA374.md): Piper PA-28R-201 · Bowling Green, OH · Accident · No injuries · Limited investigation · Final report · Sep 13, 2016 · N786BG · Substantial damage
  > 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, which prevented the pilots from knowing whether the gear was…
- [NTSB ERA10LA103](https://openairdocs.org/ntsb/ERA10LA103.md): Fairchild SA227 · Somerset, KY · Accident · No injuries · Limited investigation · Final report · Jan 2, 2010 · N227ML · Substantial damage
  > 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.md): Piper PA-30 · Walla Walla, WA · Accident · No injuries · Limited investigation · Final report · Jul 22, 2009 · N7504Y · Substantial damage
  > 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 landing gear warning horn.
- [NTSB CEN09CA307](https://openairdocs.org/ntsb/CEN09CA307.md): Beech C35 · Englewood, CO · Accident · No injuries · Data collection · Final report · May 19, 2009 · N1945D · Substantial damage
  > The collapse of the landing gear due to the mechanic's failure to properly wire the landing gear squat switch.

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."mKey" IN (SELECT f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f."findingCode", '01023297'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-findings/01023297/cases

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