NTSB investigations: Cessna 421C
12 cases on aircraft the registry lists as Cessna 421C, where the first occurrence was “In flight encounter with weather”. 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
| 1984 | 2 |
|---|---|
| 1985 | 1 |
| 1986 | 1 |
| 1988 | 1 |
| 1991 | 1 |
| 1992 | 1 |
| 1995 | 3 |
| 1998 | 1 |
| 2006 | 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.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('2076016', '2076017')
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\" = 240))
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 ('2076016', '2076017')
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" = 240))
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 SEA06FA147Accident · 1 fatalField investigationFinal reportCessna 421C · Carson, WAThe pilot's failure to maintain aircraft control while maneuvering. Icing conditions, clouds and the pilot's continued flight into known adverse weather were factors.NTSB FTW99LA012Accident · Minor injuriesLimited investigationFinal reportCessna 421C · Eagle Pass, TXA downdraft, which exceeded the aircraft's climb performance. A factor was the thunderstorms in the vicinity of the airport.NTSB FTW96FA073Accident · 6 fatalField investigationFinal reportCessna 421C · Cleveland, OKthe pilot's continued VFR flight into instrument meteorological conditions (IMC), and his failure to maintain control of the airplane after encountering adverse weather conditions, which resulted in a stall/spin. Factors relating to the accident were: pilot…NTSB CHI96FA017Accident · 1 fatalField investigationFinal reportCessna 421C · Battle Creek, MIthe pilot's decision to fly in adverse weather (icing) conditions; the accumulation of airframe ice; and the pilot's failure to maintain adequate airspeed for the situation, which resulted in a loss of aircraft control. The icing condition was a related…NTSB FTW95FA130Accident · 4 fatalField investigationFinal reportCessna 421C · El Prado, NMThe pilot's decision to continue flight into known adverse weather conditions and the ensuing inadvertent stall due to airframe ice. Factors were the weather conditions.NTSB ATL92FA039Accident · 5 fatalField investigationFinal reportCessna 421C · Atlantic Ocean (Atlantic Ocean)The pilot's inadequate weather evaluation, and his continued flight into known adverse weather conditions. Factors were: the improper weather briefing by a flight service station specialist, and level iii thunderstorms.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 LAX88FA215Accident · 4 fatalField investigationFinal reportCessna 421C · Shaver Lake, CAInflight encounter with forcasted severe icing and turbulence beyond the capability of either the aircraft or the pilot , which led to an inflgiht loss of control. Factors in the accident were the pilots lack of understanding of high altitude flight aspects…NTSB DEN87FA016Accident · 1 fatalField investigationFinal reportCessna 421C · Butte, MTPlt was attempting the vor-b instrument apch to Butte, MT arpt. Plt reported over the coppertown VORTAC inbound on the arpt. The procedure turn inbound course to the VORTAC is 124 degrees. The inbound course to the arpt is 094 degrees. The acft wreckage was…NTSB SEA86LA024Accident · No injuriesLimited investigationFinal reportCessna 421C · Idaho Falls, IDDuring initial apch inflight icing was encountered. The windscreen failed to heat due to an inoperative inverter. A small area on the right bottom portion of the windscreen de-iced due to defrost heat. The plt elected to land using the small clear area of the…NTSB FTW85LA080Accident · No injuriesLimited investigationFinal reportCessna 421C · Vancourt, TXAfter a complete wx brf the plt departed into known IFR cond well below apch min at the dest arpt with inadequate fuel reserves and no field alternate. After 2 missed apchs the plts desired alternate was below minimums. En route to a second alternate airport…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…