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NTSB finding · Aircraft › Fluids/misc hardware › Fluids

All 11 cases9 in the probable cause
Cases
11
In the probable cause
9 (82%)
Fatal cases
1
NTSB code
01071000

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\", '01071000') 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\", '01071000'))
  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\", '01071000') 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 · 11

NTSB CEN24LA329Accident · No injuriesClass 3 · LimitedFinal reportCessna 414 · Leadville, COA loss of brake fluid for reasons that could not be determined, which resulted in a loss of braking effectiveness during landing.Jul 4, 2024 · N1652T · Substantial damageNTSB WPR24LA009Accident · Serious injuriesClass 3 · LimitedFinal reportStephen D Phillabaum Helicycle · Deer Park, WAA loss of engine power due to fuel starvation resulting from contamination of the fuel system during low-level flight.Oct 1, 2023 · N519SP · Substantial damageNTSB CEN23LA103Accident · Minor injuriesClass 3 · LimitedFinal reportCessna 425 · Bismarck, NDA loss of braking due to inadequate servicing of brake fluid by the pilot/mechanic, which resulted in a loss of airplane control on the ground.Feb 6, 2023 · N425Z · Substantial damageNTSB WPR22LA323Accident · No injuriesClass 3 · LimitedFinal reportCessna 182K · Tooele, UTLoss of brake pressure to both sets of brakes during taxi due to failed brake caliper O-ring seals, which resulted in a loss of directional control.Aug 30, 2022 · N3094Q · Substantial damageNTSB CEN21LA286Accident · Minor injuriesClass 3 · LimitedFinal reportAyres S2R-T34 · Leoti, KSThe pilot’s loss of visibility in the cockpit due to foam created by the chemicals loaded in the hopper, which resulted in his inability to maintain airplane control during low-level flight and an impact with terrain. Contributing to the accident was the…Jun 21, 2021 · N4328P · Substantial damageNTSB CEN20LA278Accident · 1 fatalClass 3 · LimitedFinal reportGrumman G164 · Springfield, COThe pilot’s loss of visibility in the cockpit due to foam created by the chemicals loaded in the hopper, which resulted in collision with terrain. Contributing to the accident was the combining of chemicals known to produce foam and the pilot’s failure to…Jul 10, 2020 · N6917K · DestroyedNTSB ERA19IA178Incident · No injuriesClass 3 · IncidentFinal reportCessna 550 · Savannah, GAThe lineman's inadvertent introduction of diesel exhaust fluid (DEF) to the fuel truck fuel system icing inhibitor reservoir, which resulted in fuel contamination and a total loss of engine power. Contributing to the accident was the fixed-base operator's…May 9, 2019 · N744AT · No damageNTSB ERA17LA290Accident · No injuriesLimited investigationFinal reportCessna 180 · Newport, NHA leak in the right brake slave cylinder, which led to no fluid in the reservoir and subsequent asymmetric braking.Aug 20, 2017 · N1585C · Substantial damageNTSB WPR16LA104Accident · No injuriesLimited investigationFinal reportBell UH 1B · Maxwell, CAA reduction in available engine power during takeoff due to a stuck hot air valve, which resulted in low rotor rpm and a forced landing. Contributing to the accident was the lack of dry film lubricant and the presence of corrosion on the hot air valve…May 7, 2016 · N486SA · Substantial damageNTSB GAA16CA042Accident · No injuriesData collectionFinal reportCessna 421 · Amarillo, TXThe loss of directional control during taxi to the runway as a result of insufficient brake fluid level in the right brake master cylinder, resulting in a taxiway excursion and collision with a drainage culvert.Oct 14, 2015 · N19CH · Substantial damage
See all 11 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\", '01071000'))
  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.