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Nose/tail landing gear

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NTSB finding · Aircraft › Aircraft systems › Landing gear system

All 185 cases143 in the probable cause
Cases
185
In the probable cause
143 (77%)
Fatal cases
1
NTSB code
01023220

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\", '01023220') 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\", '01023220'))
  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\", '01023220') 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 · 185

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 ERA26LA104Accident · No injuriesClass 4 · LimitedFinal reportCessna 150L · Gantt, SCThe student pilot’s improper landing flare, which resulted in a bounced landing, and a nose landing gear collapse.Jan 28, 2026 · N67WJ · Substantial damageNTSB CEN26LA078Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-22-160 · Sealy, TXThe failure of the nose wheel during landing that resulted in a loss of directional control and impact with terrain.Jan 4, 2026 · N8877D · Substantial damageNTSB WPR26LA028Accident · No injuriesClass 4 · LimitedFinal reportCessna 305 · Phoenix, AZA worn tailwheel steering mechanism, which resulted in a locked tailwheel and a ground loop during a landing roll.Oct 18, 2025 · N4584N · Substantial damageNTSB CEN26LA021Accident · No injuriesClass 4 · LimitedFinal reportBeech C23 · Tulsa, OKThe pilot’s improper landing flare which resulted in a hard bounced landing.Oct 15, 2025 · N2130W · Substantial damageNTSB CEN25LA392Accident · No injuriesClass 4 · LimitedFinal reportDiamond DA20-C1 · Terre Haute, INThe failure of the nose landing gear strut and associated nosewheel separation during takeoff.Sep 19, 2025 · N544KC · Substantial damageNTSB CEN25LA361Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-30 · Caro, MIThe pilot’s failure to remove the tow bar before flight.Sep 2, 2025 · N26RJ · Substantial damageNTSB CEN25LA333Accident · No injuriesClass 4 · LimitedFinal reportParks Fokker D-VII Replica · Englewood, COA malfunction of the tailwheel which resulted in a runway excursion and ground loop.Aug 22, 2025 · N18852 · Substantial damageNTSB CEN25LA287Accident · No injuriesClass 4 · LimitedFinal reportAerotek Pitts S-2A · New Holstein, WIThe pilot’s loss of direction control during landing due to an unapproved tailwheel assembly and tail spring that resulted in a tailwheel shimmy and a subsequent ground loop.Jul 26, 2025 · N83PS · Substantial damageNTSB CEN25LA246Accident · No injuriesClass 4 · LimitedFinal reportThorp T18 · Lake Elmo, MNThe pilot’s failure to maintain obstacle clearance during the go-around, that resulted in the tailwheel impacting a taxiway sign, a subsequent loss of control due to the damaged tailwheel, and a runway excursion during the landing.Jul 6, 2025 · N18CH · Substantial damage
See all 185 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\", '01023220'))
  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.