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Airspeed/mach indicating

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NTSB finding · Aircraft › Aircraft systems › Navigation system

All 6 cases4 in the probable cause
Cases
6
In the probable cause
4 (67%)
Fatal cases
0
NTSB code
01023414

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\", '01023414') 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\", '01023414'))
  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\", '01023414') 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 · 6

NTSB WPR22LA233Accident · No injuriesClass 4 · LimitedFinal reportGMK Ventures AL18 · Moab, UTThe pilot’s failure to maintain directional control during a landing attempt, which resulted in a ground loop and collision with terrain. Contributing to the accident was the absence of an airspeed indicator due to an alternator failure.Jun 27, 2022 · N17GK · Substantial damageNTSB WPR21LA005Accident · No injuriesClass 4 · LimitedFinal reportCessna 150 · Rimrock, AZThe pilot’s improper landing flare, which resulted in a hard, bounced landing and runway excursion.Oct 5, 2020 · N22979 · Substantial damageNTSB ERA09CA333Accident · No injuriesData collectionFinal reportChatham Robert M RV6-A · Gilbert, SCThe pilot’s failure to maintain directional control of the airplane during landing roll. Contributing to the accident was the airspeed indicator that became inoperative during the landing approach.Jun 9, 2009 · N55EC · Substantial damageNTSB CEN09CA342Accident · No injuriesData collectionFinal reportBeech S35 · Decatur, TXBoth pilots' inadequate preflight inspection and failure to identify the presence of dirt and insect larvae in the pitot tube, and the owner-pilot's attempt to turn off the runway and onto the taxiway at an excessive speed during the aborted takeoff.Jun 5, 2009 · N8636Q · Substantial damageNTSB CEN09LA276Accident · Serious injuriesLimited investigationFinal reportHawkins August E Aventura II · Griffith, INThe pilot's failure to maintain control of the airplane due to an inadvertent stall. Contributing to the accident was the failure of the airspeed indicator due to separation of the pitot-static line at the left wing root.May 2, 2009 · N20GH · Substantial damageNTSB ERA09LA111Accident · No injuriesLimited investigationFinal reportCzech Aircraft Works SportCruiser · Emporia, VAThe student pilot's failure to maintain directional control during the landing. Contributing to the accident was the improperly marked airspeed indicator and the airplane manufacturer's improper airspeed information.Dec 23, 2008 · N524SC · Substantial damage
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\", '01023414'))
  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.