NTSB investigations: Cessna 421C, CO
10 cases on aircraft the registry lists as Cessna 421C. 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.
Cases per year
| 1973 | 1 |
|---|---|
| 1980 | 1 |
| 1983 | 2 |
| 1984 | 1 |
| 1990 | 1 |
| 1991 | 1 |
| 2008 | 1 |
| 2021 | 1 |
| 2024 | 1 |
Where
Open the mapLatest 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.\"eventStateOrRegion\" = 'CO' 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 ('2076016', '2076017'))
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" = 'CO' 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 ('2076016', '2076017'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun 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 CEN24FA228Accident · 2 fatalClass 3 · FieldFinal reportCessna 421 · Steamboat Springs, COThe pilot’s failure to maintain sufficient airspeed following a loss of engine power, which resulted in an inadvertent aerodynamic stall/spin at low altitude.NTSB CEN21LA315Accident · Minor injuriesClass 3 · LimitedFinal reportCessna 421C · Longmont, COThe loss of performance for reasons that could not be determined.NTSB DFW08LA115Accident · No injuriesLimited investigationFinal reportCessna 421C · Sterling, COFailure and separation of the upper and lower right main gear torque links links, which resulted in a loss of directional control on landing roll-out.NTSB DEN91FA056Accident · 5 fatalField investigationFinal reportCessna 421C · Cortez, COThe pilot's improper IFR procedures. Factors were: the existing weather conditions and the pilot's failure to obtain a preflight briefing.NTSB DEN90FA085Accident · 2 fatalField investigationFinal reportCessna 421-C · Boulder, COA loss of airplane control as a result control interference by the passenger following a struggle between the pilot and the passenger.NTSB DEN84MA247Accident · 3 fatalMajor investigationFinal reportCessna 421C · Fort Lupton, CODuring a preflt wx briefing, the plt was advised of thunderstorms & intense rain showers on the route of flt. However, he filed an IFR flt plan & took off. During flt, the ATC controller advised the plt of a level 6 cell ahead & noted that he had no report on…NTSB DEN84FA004Accident · No injuriesField investigationFinal reportCessna 421C · Center, COThe acft collided with a dirt bank after a left engine overspeed and loss of directional control during takeoff. The plthad already aborted one takeoff due to overboost and a sticking wastegate. The problem seemed corrected after work and lubrication by a…NTSB DEN83LA081Accident · No injuriesLimited investigationFinal reportCessna 421C · Gunnison, COThe plt began taking off on rwy 06 with a wind from 190 deg at 8 KTS. He stated that max power & RPM were obtained. He noted that he obtained 39 inches of manifold pressure & 2235 RPM at 100 KTS IAS. Reportedly, the acft rotated properly, but began to vibrate…NTSB DEN80FTE71Accident · No injuriesClosedCessna 340 · Steamboat Spgs, CONTSB DEN74FTE34Accident · Minor injuriesClosedCessna 421B · Aspen, CO