NTSB investigations: Cessna 421B

7 cases on aircraft the registry lists as Cessna 421B, where the first occurrence was “Loss of control - in flight”. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.

Defining event

Finding

Phase of flight

Aircraft model

Cases per year

19832026

NTSB investigations: Cessna 421B per year, 1983–2026: 7 cases
1983	1
1987	1
1991	1
1993	1
2000	1
2006	2

Where

Open the map

Latest cases

Query with SQL

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 x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('2076014') AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 250)) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

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 x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('2076014')
      AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o.\"occurrenceNumber\" = 1 AND o.\"occurrenceCode\" = 250))
  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.

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 x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('2076014')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 250))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

NTSB DFW07CA038Accident · No injuriesData collectionFinal reportCessna 421 · Brackettville, TXThe pilot's failure to maintain proper runway alignment on final approach and his delayed decision to execute a go-around. Factors were the dark night conditions and the inoperative runway edge lights.Dec 16, 2006 · N642CB · Destroyed NTSB CHI06FA076Accident · 4 fatalField investigationFinal reportCessna 421B · Wheeling, ILThe pilot's failure to maintain airspeed during the landing approach which led to an inadvertent stall and subsequent uncontrolled descent and impact with the ground.Jan 31, 2006 · N920MC · Destroyed NTSB DEN00FA037Accident · 1 fatalField investigationFinal reportCessna 421B · Telluride, COThe non-instrument rated pilot's intentional flight into IMC, and his subsequent spatial disorientation that resulted in an inadvertent stall. A factor was the snow showers weather condition.Jan 2, 2000 · N421CF · Destroyed NTSB CHI94MA032Accident · 5 fatalMajor investigationFinal reportCessna 421B · Greensburg, INan inadvertent stall by the pilot in command. Factors associated with the accident are the icing conditions and low ceilings.Nov 6, 1993 · N41010 · Destroyed NTSB FTW91FA027Accident · 6 fatalField investigationFinal reportCessna 421B · Muskogee, OKThe pilot's failure to maintain control of the aircraft, due to spatial disorientation. Factors related to the accident were: darkness, adverse weather conditions, and the pilot's physical impairment from the chronic sinus infection.Jan 6, 1991 · N421H · Destroyed NTSB MIA88FA005Accident · 5 fatalField investigationFinal reportCessna 421B · Deland, FLThe acft was observed to be flying slowly, then roll steeply to the left and dive into an unoccupied house from about 300 ft shortly after takeoff. The plt had considerable flt time but he had not flown this model, except for a 35 min checkout that morning.…Oct 7, 1987 · N8043Q · Destroyed NTSB DEN84LA048Accident · Minor injuriesLimited investigationFinal reportCessna 421B · Aspen, COThe acft collided with the snow to the side and short of the rwy during the approach to land. The plt said the acft was blown off line and his vision was obscured by blowing snow. The acft hit REIL lights and stopped 760 ft short of the approach end of the…Dec 23, 1983 · N768T · Substantial damage