NTSB investigations: Cessna 421C
9 cases on aircraft the registry lists as Cessna 421C, where the sequence of events included Runway excursion. 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
| 2008 | 1 |
|---|---|
| 2013 | 2 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2021 | 2 |
| 2023 | 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_events.parquet' s WHERE s.case_mkey = x.case_mkey AND s.aircrafts_position = x.position AND s.\"tier2Number\" = '300' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE \"isDefiningEvent\")))
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_events.parquet' s WHERE s.case_mkey = x.case_mkey AND s.aircrafts_position = x.position AND s."tier2Number" = '300' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")))
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 ERA23LA180Accident · No injuriesClass 4 · LimitedFinal reportCessna 421C · Leesburg, VASeparation of the left man landing gear scissor hardware, which resulted in a loss of directional control and subsequent runway excursion during landing.NTSB CEN21LA315Accident · Minor injuriesClass 3 · LimitedFinal reportCessna 421C · Longmont, COThe loss of performance for reasons that could not be determined.NTSB ERA21LA134Accident · Minor injuriesClass 3 · LimitedFinal reportCessna 421 · St. Marys, PAThe pilot’s decision to continue the approach to a snow-covered runway in low-visibility conditions with limited ability to visually differentiate the left runway edge from the snow berm that ran along that side of the runway.NTSB WPR18LA166Accident · Minor injuriesClass 3 · LimitedFinal reportCessna 421C · Plant City, FLThe pilot's delayed decision to abort the takeoff, which resulted in a runway overrun. Contributing to the accident was an engine anomaly for reasons that could not be determined based on the available information, and the pilot's failure to activate the…NTSB WPR17LA051Accident · No injuriesLimited investigationFinal reportCessna 421C · Jackson, CAThe failure of the right main landing gear torque link bolt in overstress, which resulted in the collapse of the landing gear during the landing roll.NTSB WPR16LA092Accident · No injuriesLimited investigationFinal reportCessna 421C · Death Valley, CAA runway overrun for reasons that could not be determined based on the available information.NTSB CEN13FA509Accident · 1 fatalField investigationFinal reportCessna 421C · Paris, ILThe pilot's failure to abort the takeoff during the ground roll after detecting the airplane's degraded performance. Contributing to the accident was the pilot's decision to attempt a flight with a known problem with the left engine and the likely partial…NTSB CEN13LA208Accident · No injuriesLimited investigationFinal reportCessna 421C · Amarillo, TXMaintenance personnel's failure to detect the misadjustment of the left landing gear actuator's switch after recent maintenance, which prevented the landing gear from locking in the extended position and resulted in the landing gear collapsing during landing.NTSB WPR09LA029Accident · No injuriesLimited investigationFinal reportCessna 421C · Mesa, AZThe failure of the hydraulic landing gear extension systems due to a ruptured line.