OpenAirDocs.org

Navigation system, general

Open the Markdown

NTSB finding · Aircraft › Aircraft systems › Navigation system

All 13 cases3 in the probable cause
Cases
13
In the probable cause
3 (23%)
Fatal cases
8
NTSB code
01023400

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\", '01023400') 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\", '01023400'))
  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\", '01023400') 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 · 13

NTSB CEN25LA356Accident · Serious injuriesClass 3 · LimitedFinal reportSikorsky S-76 · Round Mountain, TXThe flight crew’s failure to properly identify the heliport in dark night conditions, which resulted in the flight crew attempting to land and a subsequent impact with trees and terrain.Sep 1, 2025 · N36RP · Substantial damageNTSB ERA22FA405Accident · 1 fatalClass 3 · FieldFinal reportBeech 95-B55 · Hartwell, GAThe pilot’s spatial disorientation and subsequent loss of airplane control following a perceived undetermined problem with the airplane’s gyroscopic instrumentation.Sep 10, 2022 · N3670D · Substantial damageNTSB CEN21LA232Accident · No injuriesClass 3 · LimitedFinal reportCirrus Design SR22 · Whitewater, WIAn inflight instrument malfunction for reasons that could not be determined based on available information, which led to the pilot’s decision to activate the airframe parachute system.May 16, 2021 · N4144B · Substantial damageNTSB CEN19MA141Accident · 6 fatalClass 1 · MajorFinal reportDe Havilland DHC-2 · Ketchikan, AKThe inherent limitations of the see-and-avoid concept, which prevented the two pilots from seeing the other airplane before the collision, and the absence of visual and aural alerts from both airplanes’ traffic display systems, while operating in a geographic…May 13, 2019 · N952DB · 2 aircraft · DestroyedNTSB DCA17IA148Incident · No injuriesClass 1 · IncidentFinal reportAirbus A320-211 · San Francisco, CAThe flight crew's misidentification of taxiway C as the intended landing runway, which resulted from the crewmembers' lack of awareness of the parallel runway closure due to their ineffective review of notice to airmen (NOTAM) information before the flight…Jul 8, 2017 · C-FKCK · No damageNTSB GAA16CA399Accident · No injuriesData collectionFinal reportAir Tractor AT 301 · Bird Island, MNThe pilot's diverted attention inside the cockpit and failure to maintain the airplane's altitude while maneuvering at a low altitude, resulting in an impact with terrain.Jul 27, 2016 · N7311X · Substantial damageNTSB ANC15MA041Accident · 9 fatalClass 1 · MajorFinal reportDehavilland DHC-3 · Ketchikan, AK(1) the pilot's decision to continue visual flight into an area of instrument meteorological conditions, which resulted in his geographic disorientation and controlled flight into terrain; and (2) Promech's company culture, which tacitly endorsed flying in…Jun 25, 2015 · N270PA · Substantial damageNTSB ERA15FA144Accident · 3 fatalField investigationFinal reportMooney M20F · Norfolk, VAThe pilot's failure to properly execute the instrument approach procedure. Contributing to the accident were the pilot's improper preflight planning and his decision to conduct the flight in instrument meteorological conditions at night into forecast moderate…Mar 4, 2015 · N66BB · Substantial damageNTSB WPR14FA349Accident · 1 fatalField investigationFinal reportBeech V35B · Novato, CAThe instrument-rated pilot's decision to conduct a visual approach to the airport in night, instrument meteorological conditions, which resulted in controlled flight into terrain. Contributing to the accident was the pilot's loss of situational awareness, the…Aug 19, 2014 · N1160T · Substantial damageNTSB CEN14GA135Accident · 1 fatalFinal reportCessna 210E · Oden, ARThe pilot’s improper decision to fly into an area with reported marginal meteorological conditions in an airplane not maintained for instrument flight and his subsequent failure to maintain clearance from trees and terrain.Jan 31, 2014 · N4957U · Substantial damage
See all 13 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\", '01023400'))
  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.