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Gear position and warning

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NTSB finding · Aircraft › Aircraft systems › Landing gear system

All 37 cases24 in the probable cause
Cases
37
In the probable cause
24 (65%)
Fatal cases
5
NTSB code
01023260

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\", '01023260') 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\", '01023260'))
  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\", '01023260') 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 · 37

NTSB CEN25LA016Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-30 · Springfield, MOThe flight instructor’s inability to confirm landing gear position before landing due to the sun glare which resulted in gear up landing. Contributing to the accident was an undetected tripped circuit breaker for the landing gear and the inoperative gear…Oct 10, 2024 · N7577Y · Substantial damageNTSB WPR24FA285Accident · 1 fatalClass 3 · FieldFinal reportCessna A185F · Kent, WAThe pilot’s failure to properly configure the amphibious landing gear for a water landing, which resulted in a touchdown on the water with the wheels extended, noseover, and airplane submersion.Aug 24, 2024 · N61323 · Substantial damageNTSB CEN24LA264Accident · No injuriesClass 4 · LimitedFinal reportCessna 210 · Mount Vernon, ILThe pilot’s failure to lower the landing gear, resulting in a wheel up landing. Contributing to the accident was the intermittent warning horn which likely did not sound to warn the pilot about the misconfigured landing gear.Jul 12, 2024 · N9776Y · Substantial damageNTSB ERA24LA193Accident · No injuriesClass 4 · LimitedFinal reportBeech E-55 · Greenville, SCThe pilot’s failure to extend the landing gear before landing.Apr 24, 2024 · N333HE · Substantial damageNTSB CEN23LA407Accident · No injuriesClass 3 · LimitedFinal reportBeech 95-B55 (T42A) · Greeley, COThe pilot’s failure to extend the landing gear. Contributing to the accident was a malfunction of the landing gear warning horn for undetermined reasons.Aug 30, 2023 · N2KM · Substantial damageNTSB WPR23LA321Accident · No injuriesClass 3 · LimitedFinal reportCessna T210M · Napa, CAInsufficient hydraulic pressure to the landing gear system following the completion of the emergency gear extension checklist, which resulted in the main landing gear collapsing during landing. Contributing to the accident was a loss of electrical power for…Aug 21, 2023 · N6535B · Substantial damageNTSB WPR23LA186Accident · Serious injuriesClass 3 · LimitedFinal reportAviat A-1C-180 Husky · Lakewood, WAAn erroneous landing gear warning that led to the pilot’s decision to abort the landing, which resulted in a collision with trees during a go-around.May 9, 2023 · N416AG · DestroyedNTSB WPR22LA353Accident · No injuriesClass 3 · LimitedFinal reportCessna 525B · Pasco, WAThe failure of the pilot to ensure the landing gear was extended before landing. Contributing was the pilot’s failure to fly a stabilized approach, and his configuration of the airplane that prevented activation of the landing gear not extended warning system…Sep 20, 2022 · N528DV · DestroyedNTSB ERA22LA415Accident · No injuriesClass 4 · LimitedFinal reportCessna T210N · Georgetown, DEThe pilot's failure to extend the landing gear before landing. Contributing to the accident was an inoperative landing gear warning horn.Aug 25, 2022 · N5132C · Substantial damageNTSB ERA22FA047Accident · 1 fatalClass 3 · FieldFinal reportPiper PA30 · Rock Hill, SCThe pilot’s exceedance of the airplane's critical angle of attack while troubleshooting a landing gear indication, which resulted in an aerodynamic stall at low altitude.Nov 5, 2021 · N8924Y · Substantial damage
See all 37 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\", '01023260'))
  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.