NTSB investigations: Cessna 421B
5 cases on aircraft the registry lists as Cessna 421B, where the first occurrence was “Main gear collapsed”. 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
| 1982 | 1 |
|---|---|
| 1984 | 1 |
| 1985 | 1 |
| 1990 | 1 |
| 1999 | 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 ('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\" = 191))
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" = 191))
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 LAX00LA004Accident · No injuriesLimited investigationFinal reportCessna 421B · Montague, CAThe collapse of the left main landing gear during the landing rollout for undetermined reasons, which resulted in the pilot's loss of directional control.NTSB MIA90LA192Accident · No injuriesLimited investigationFinal reportCessna 402B · St. ThomasSeparation of the left main landing gear torque tube bracket assembly due to sheared rivets from a previous hard side load landing which was not reported.NTSB FTW85LQG01Accident · No injuriesFinal reportCessna 421B · Amarillo, TXThe acft ground looped following a collapse of the left main gear after a landing roll of aprx 600 to 700 ft. post accident inspection of the gear revealed a bolt had backed out of the gear down lock arm where it locks overcenter.NTSB CHI84LA128Accident · No injuriesLimited investigationFinal reportCessna 421B · Madison, WIThe acft went off the rwy to the left during landing. There was a crosswind of 15-28 KTS at the time. The plt said the acft veered left and could not be controlled. After the accident the was 464P-26 bolt and 5133-4032 spacer were sheared off both the left…NTSB ATL83FA073Accident · No injuriesField investigationFinal reportCessna 421B · Fort Payne, ALDuring landing the right main landing gear scissors bolt & bushing pulled through the scissors mount hole allowing the landing gear to rotate 90 deg. An incorrect washer (standard 5/16 in) had been installed in the scissors assembly duringrecent maintenance.…