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NTSB defining event · CICTT: System/Component Failure (Non-Powerplant)

CICTT occurrence categories (PDF)CICTT phases of flight (PDF)

All 15 cases20 anywhere in the sequence
Defining event in
15 cases
In the sequence of
20 cases
Fatal cases
1
NTSB code
336

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 it was the defining event; in gray, cases where it came elsewhere in the sequence. The map shows the cases where it was the defining event. Events are coded with the final report, so the latest years are incomplete.

Cases per year

2008Defining eventElsewhere in the sequence2026

Where

Open the map
Query with SQL
duckdb -csv -c "SELECT year(c.\"eventDate\") AS year, count(DISTINCT e.case_mkey) AS cases,
    count(DISTINCT e.case_mkey) FILTER (WHERE e.\"isDefiningEvent\") AS defining
  FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c.\"mKey\" = e.case_mkey
  WHERE e.\"tier2Number\" = '336' AND e.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE \"isDefiningEvent\")
  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 these cases

Phase of flight
  • Approach4
  • Landing-landing roll2
  • Enroute2
  • Other1
  • Enroute-cruise1
  • Takeoff-rejected takeoff1
  • Takeoff1
  • Taxi-from runway1
  • Pushback/tow-engine not oper1
  • Standing-engine(s) operating1
In the probable cause
Aircraft models

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

Query with SQL
duckdb -csv -c "WITH defining AS (SELECT * FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE \"tier2Number\" = '336' AND \"isDefiningEvent\")
  SELECT * FROM (
  SELECT 'Phase of flight' AS kind, e.\"tier1Number\" AS code, max(e.\"eventTier1Name\") AS name, count(DISTINCT e.case_mkey) AS cases
  FROM defining e
  GROUP BY ALL
  UNION ALL
  SELECT 'Finding in the probable cause', left(f.\"findingCode\", 8), max(f.\"tier4Name\"), count(DISTINCT f.case_mkey)
  FROM defining e JOIN 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f ON f.case_mkey = e.case_mkey AND f.aircrafts_position = e.aircrafts_position AND f.\"inProbableCause\"
  WHERE f.\"findingCode\" GLOB '[0-9][0-9]*'
  GROUP BY ALL
  UNION ALL
  SELECT 'Aircraft model', a.aircraft_model_code, any_value(concat_ws(' ', m.manufacturer, m.model)), count(DISTINCT e.case_mkey)
  FROM defining e JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = e.case_mkey AND a.position = e.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
  )
  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 · 15

NTSB GAA26WA247Accident · No injuriesClass 5 · ForeignPiper PA28 · Roszczep, PolandMay 21, 2026 · SE-EOT · Substantial damageNTSB DCA26WA036Occurrence · No injuriesClass 5 · ForeignEmbraer ERJ170 · Greenwich, CTNov 22, 2025 · C-FRQM · No damageNTSB ENG25WA046IncidentClass 5 · ForeignAirbus A321 · Mérignac, FranceJan 13, 2025 · PH-YHA · No damageNTSB DCA24WA331IncidentClass 5 · ForeignAirbus A320 · Bordeaux-Merignac, FranceSep 20, 2024 · EI-NSF · No damageNTSB GAA24WA051Accident · 2 fatalClass 5 · ForeignDiamond DA20-C1 · Cooking Lake, CanadaAug 11, 2023 · C-FRZGNTSB DCA23WA366Incident · Minor injuriesClass 5 · ForeignAirbus A320 · Barcelona, SpainJul 16, 2023 · EC-JTR · Minor damageNTSB DCA23WA476Incident · No injuriesClass 4 · ForeignBoeing 787 · Dubai, United Arab EmiratesMar 10, 2023 · AC9-FG · No damageNTSB DCA23WA475IncidentClass 4 · ForeignBoeing 737 · Dubai, QatarMar 10, 2023 · AC9-FG · No damageNTSB DCA22WA165AccidentClass 5 · Foreigndrone Viper Pro · Felthorpe, United KingdomJul 30, 2022 · UNREGNTSB GAA22WA116Accident · No injuriesClass 5 · ForeignCruiser PS-28 · Casarrubios, SpainJan 10, 2022 · EC-NKP · Substantial damage
See all 15 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 e.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.\"isDefiningEvent\" AND e.\"tier2Number\" = '336')
  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.