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Mixture control

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NTSB finding · Aircraft › Aircraft power plant › Engine controls

All 41 cases38 in the probable cause
Cases
41
In the probable cause
38 (93%)
Fatal cases
4
NTSB code
01057602

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\", '01057602') 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\", '01057602'))
  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\", '01057602') 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 · 41

NTSB ERA26LA092Accident · No injuriesClass 4 · LimitedFinal reportCessna 172P · Flemington, GAThe pilot’s inadvertent manipulation of the mixture control, which resulted in a total loss of engine power during initial climb and a subsequent forced lading.Jan 9, 2026 · N96493 · Substantial damageNTSB WPR25LA070Accident · Minor injuriesClass 3 · LimitedFinal reportVans RV-7A · Gila Bend, AZA disconnection of the mixture control linkage during flight, which resulted in fuel starvation and a total loss of engine power. Contributing was the inadequate inspection of the mixture control arm attachment hardware.Dec 22, 2024 · N1FB · Substantial damageNTSB CEN25LA021Accident · No injuriesClass 3 · LimitedFinal reportMooney M20K · Elizabeth, LAThe pilot’s failure to set the engine fuel mixture to the required setting, which resulted in reduced engine power during a go-around and subsequent impact with trees. Contributing to the accident, the failure of the mechanic to perform a current fuel…Oct 17, 2024 · N231MW · Substantial damageNTSB WPR25LA011Accident · No injuriesClass 4 · LimitedFinal reportAir Tractor AT502 · Corcoran, CAA total loss of engine power due to the pilot's improper manipulation of the condition lever during flight, which resulted in fuel starvation and a forced landing.Oct 8, 2024 · N243LA · Substantial damageNTSB ERA24LA195Accident · No injuriesClass 4 · LimitedFinal reportReddick Jonathan L Zodiac 601XLB · Dunbar, PAA total loss of engine power as a result of an improperly fabricated fuel-air mixture cable bracket. Contributing was the pilot’s decision to fly the airplane with a known mechanical engine issue, and the presence of another airplane that was back taxiing on…Apr 27, 2024 · N601DR · DestroyedNTSB WPR23LA077Accident · Serious injuriesClass 3 · LimitedFinal reportBeech V35B · Livermore, CAThe pilot’s inadvertent use of the mixture control instead of the throttle, which resulted in fuel starvation and the subsequent loss of engine power.Dec 25, 2022 · N65Y · Substantial damageNTSB ERA22LA321Accident · No injuriesClass 4 · LimitedFinal reportCessna 150G · Tuscaloosa, ALThe student pilot’s inadvertent use of the fuel mixture knob instead of the carburetor heat knob, which resulted in fuel starvation and a subsequent loss of engine power.Jul 15, 2022 · N3301J · Substantial damageNTSB ANC21LA040Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-18-105 Special · Gakona, AKThe pilot’s decision to initiate a flight with a failed mixture control cable which resulted in a total loss of engine power.May 10, 2021 · N5489H · Substantial damageNTSB CEN18LA275Accident · No injuriesLimited investigationFinal reportWhittman Tailwind · Orient, OHThe pilot’s and the flight instructor's incorrect use of the modified mixture control, which resulted in a loss of engine power due to fuel starvation and a forced landing. Also causal was the inadequate systems knowledge of the experimental, amateur-built…Jul 12, 2018 · N619NT · Substantial damageNTSB ANC18CA052Accident · No injuriesData collectionFinal reportCessna 182 · Chugiak, AKThe pilot's mismanagement of the engine controls due to distraction in the traffic pattern, which resulted in a hard landing short of the runway.Jul 1, 2018 · N5020D · Substantial damage
See all 41 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\", '01057602'))
  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.