NTSB investigations: Cessna 421B, OH

8 cases on aircraft the registry lists as Cessna 421B. 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

19742026

NTSB investigations: Cessna 421B, OH per year, 1974–2026: 8 cases
1974	2
1978	1
1992	1
1999	1
2004	1
2005	1
2019	1

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."eventStateOrRegion" = 'OH' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('2076014')) 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.\"eventStateOrRegion\" = 'OH' AND c.\"eventCountry\" = 'USA'
    AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('2076014'))
  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."eventStateOrRegion" = 'OH' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('2076014'))
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 CEN19FA100Accident · 1 fatalClass 2 · FieldFinal reportCessna 421 · Plain City, OHA loss of airspeed indication due to icing of the airplane's pitot probe, and the pilot's loss of control while maneuvering.Mar 17, 2019 · N424TW · Destroyed NTSB NYC05LA116Accident · No injuriesLimited investigationFinal reportCessna 421B · Medina, OHAn overload failure of the left main landing gear attachment assembly.Jul 7, 2005 · N318RF · Substantial damage NTSB NYC04LA067Accident · No injuriesLimited investigationFinal reportCessna 421 · Ravenna, OHThe pilot's failure to maintain airspeed, which resulted in an inadvertent stall and subsequent hard landing. A factor in the accident was degraded aircraft performance due to the airframe ice accumulation.Jan 14, 2004 · N300FB · Substantial damage NTSB IAD99LA027Accident · No injuriesLimited investigationFinal reportCessna 421B · Youngstown, OHThe pilot's failure to maintain aircraft control. A factor was the icy runway.Jan 15, 1999 · N882BB · Substantial damage NTSB NYC92LA124Accident · No injuriesLimited investigationFinal reportCessna 421B · Columbus, OHThe electrical fire which started in a component that was part of a door seal modification. Also causal to the accident was the installation of this unapproved airplane modification.Jun 22, 1992 · N39PW · Substantial damage NTSB CHI78IA002Incident · No injuriesClosedCessna 421B · Mt Vernon, OHOct 3, 1978 · N5965M · No damage NTSB CHI75FEK15Accident · Serious injuriesClosedCessna 421B · Mt Vernon, OHDec 1, 1974 · N3368Q · Destroyed NTSB CHI75FEI26Accident · No injuriesClosedCessna 421B · Toledo, OHOct 24, 1974 · N5976M · Substantial damage