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Nose/tail gear attach section

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NTSB finding · Aircraft › Aircraft systems › Landing gear system

All 29 cases25 in the probable cause
Cases
29
In the probable cause
25 (86%)
Fatal cases
0
NTSB code
01023221

NTSB has coded findings and defining events since 2008. Earlier cases used its older occurrence and cause codes, so they aren’t counted here.

When and where

In green, cases where NTSB made it part of the probable cause; in gray, a factor or other finding. Findings are coded with the final report, often a year or more after the event, so the latest years are incomplete.

Cases per year

2008In the probable causeFactor only2026

Where

Open the map
Query with SQL
duckdb -csv -c "SELECT year(c.\"eventDate\") AS year, count(DISTINCT f.case_mkey) AS cases,
    count(DISTINCT f.case_mkey) FILTER (WHERE f.\"inProbableCause\") AS in_probable_cause
  FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c.\"mKey\" = f.case_mkey
  WHERE starts_with(f.\"findingCode\", '01023221') AND c.\"eventDate\" >= DATE '2000-01-01'
  GROUP BY 1
  ORDER BY 1"

Prints the counts as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

In the same cases

Defining events
Aircraft models

Aircraft matched to the registry by N-number and date.

Other findings
Query with SQL
duckdb -csv -c "WITH matched AS (SELECT DISTINCT case_mkey, aircrafts_position FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' WHERE starts_with(\"findingCode\", '01023221'))
  SELECT * FROM (
  SELECT 'Defining event' AS kind, e.\"tier2Number\" AS code, max(e.\"eventTier2Name\") AS name, count(DISTINCT f.case_mkey) AS cases
  FROM matched f JOIN 'https://openairdocs.org/data/latest/ntsb_events.parquet' e ON e.case_mkey = f.case_mkey AND e.aircrafts_position = f.aircrafts_position AND e.\"isDefiningEvent\"
  WHERE e.\"tier2Number\" <> ''
  GROUP BY ALL
  UNION ALL
  SELECT 'Aircraft model', a.aircraft_model_code, any_value(concat_ws(' ', m.manufacturer, m.model)), count(DISTINCT f.case_mkey)
  FROM matched f JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = f.case_mkey AND a.position = f.aircrafts_position
  LEFT JOIN 'https://openairdocs.org/data/latest/faa_aircraft_model.parquet' m ON m.code = a.aircraft_model_code
  WHERE a.aircraft_model_code IS NOT NULL
  GROUP BY ALL
  UNION ALL
  SELECT 'Other finding', left(g.\"findingCode\", 8), max(g.\"tier4Name\"), count(DISTINCT g.case_mkey)
  FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' g
  WHERE g.case_mkey IN (SELECT case_mkey FROM matched) AND NOT starts_with(g.\"findingCode\", '01023221') AND g.\"findingCode\" GLOB '[0-9][0-9]*'
  GROUP BY ALL
  )
  QUALIFY row_number() OVER (PARTITION BY kind ORDER BY cases DESC) <= 10
  ORDER BY kind, cases DESC"

Prints the counts as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

Newest cases · 29

NTSB WPR26LA114Accident · Minor injuriesClass 4 · LimitedFinal reportAmerican Champion 8GCBC · Carefree, AZThe pilot reported that he landed the tailwheel equipped airplane at a backcountry airstrip, and while taxiing on rough terrain, the tailwheel spring failed and the tailwheel assembly separated from the airplane. The pilot shut down the airplane and exited to…Mar 2, 2026 · N636DB · Substantial damageNTSB ERA25LA268Accident · No injuriesClass 4 · LimitedFinal reportPiper PA46 · Elysburg, PAFailure of the engine mount which resulted in a collapse of the nose landing gear.Jul 11, 2025 · N962WF · Substantial damageNTSB CEN25LA134Accident · No injuriesClass 4 · LimitedFinal reportCessna 152 · Denton, TXThe pilot’s improper landing flare and subsequent improper recovery from a bounced landing. Contributing to the accident was the gusty crosswind and windshear during landing.Mar 20, 2025 · N68332 · Substantial damageNTSB CEN25LA071Accident · No injuriesClass 4 · LimitedFinal reportCessna 150F · McKinney, TXThe flight instructor’s inadequate supervision and delayed remedial action and the student pilot’s failure to maintain a proper landing flare, which resulted in a nose down impact with the runway.Jan 4, 2025 · N3589L · Substantial damageNTSB WPR23LA216Accident · No injuriesClass 3 · LimitedFinal reportCessna 172R · Santa Monica, CAA failure of the nose wheel upper torque link bolt, which resulted in a loss of steering control. Contributing to the accident were maintenance personnel’s failure to inspect and replace the fractured bolt and the pilot’s oversight of the bolt during his…Jun 5, 2023 · N819KS · Substantial damageNTSB ANC20LA053Accident · No injuriesClass 3 · LimitedFinal reportZenith Stol CH701 · Ambler, AKThe pilot’s improper decision to take off from unsuitable terrain, which resulted in impact with uneven terrain, the subsequent failure of the nosewheel fork, and a nose over.May 31, 2020 · N324WS · Substantial damageNTSB WPR20CA080Accident · No injuriesClass 4 · Data collectionFinal reportMerwin Kitfox · Goodyear, AZThe tail wheel mechanism detachment for reasons that could not be determined due to the lack of available evidence which resulted in the loss of directional control on landing.Jan 25, 2020 · N399A · Substantial damageNTSB WPR19TA248Accident · Minor injuriesClass 3Final reportHall Kitfox · Nampa, IDThe owner's improper installation of the tailwheel, which resulted in the pilot's inability to maintain directional control during landing as a result of severe tailwheel vibrations.Aug 30, 2019 · N87TJ · Substantial damageNTSB ANC16LA048Accident · No injuriesLimited investigationFinal reportStinson 108 · Haines, AKThe pilot’s failure to maintain directional control of the airplane during the landing roll with a quartering tailwind, which resulted in a ground loop and overstress failure of the left main landing gear wheel axle.Jul 18, 2016 · N343C · Substantial damageNTSB GAA16CA286Accident · No injuriesData collectionFinal reportCessna 172 · Arlington, WAThe failure of the airplane’s right steering rod end, which resulted in the pilot’s inability to maintain directional control.Jun 6, 2016 · N539MT · Substantial damage
See all 29 cases
Query with SQL
duckdb -csv -c "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\", '01023221'))
  ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.