# NTSB investigations: Cessna 421C: Runway excursion

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB ERA23LA180](https://openairdocs.org/ntsb/ERA23LA180.md): Cessna 421C · Leesburg, VA · Accident · No injuries · Class 4 · Limited · Final report · Apr 5, 2023 · N880JS · Substantial damage
  > Separation of the left man landing gear scissor hardware, which resulted in a loss of directional control and subsequent runway excursion during landing.
- [NTSB CEN21LA315](https://openairdocs.org/ntsb/CEN21LA315.md): Cessna 421C · Longmont, CO · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 10, 2021 · N66NC · Substantial damage
  > The loss of performance for reasons that could not be determined.
- [NTSB ERA21LA134](https://openairdocs.org/ntsb/ERA21LA134.md): Cessna 421 · St. Marys, PA · Accident · Minor injuries · Class 3 · Limited · Final report · Feb 22, 2021 · N84HA · Substantial damage
  > The 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 WPR18LA166](https://openairdocs.org/ntsb/WPR18LA166.md): Cessna 421C · Plant City, FL · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 11, 2018 · N13RF · Substantial damage
  > The 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 WPR17LA051](https://openairdocs.org/ntsb/WPR17LA051.md): Cessna 421C · Jackson, CA · Accident · No injuries · Limited investigation · Final report · Jan 7, 2017 · N71RC · Substantial damage
  > The 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 WPR16LA092](https://openairdocs.org/ntsb/WPR16LA092.md): Cessna 421C · Death Valley, CA · Accident · No injuries · Limited investigation · Final report · Apr 13, 2016 · N21SG · Substantial damage
  > A runway overrun for reasons that could not be determined based on the available information.
- [NTSB CEN13FA509](https://openairdocs.org/ntsb/CEN13FA509.md): Cessna 421C · Paris, IL · Accident · 1 fatal · Field investigation · Final report · Aug 27, 2013 · N229H · Destroyed
  > The 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 CEN13LA208](https://openairdocs.org/ntsb/CEN13LA208.md): Cessna 421C · Amarillo, TX · Accident · No injuries · Limited investigation · Final report · Mar 27, 2013 · N805DC · Substantial damage
  > Maintenance 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 WPR09LA029](https://openairdocs.org/ntsb/WPR09LA029.md): Cessna 421C · Mesa, AZ · Accident · No injuries · Limited investigation · Final report · Oct 30, 2008 · N421PC · Substantial damage
  > The failure of the hydraulic landing gear extension systems due to a ruptured line.

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```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."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
```

This list as a web page: https://openairdocs.org/ntsb-events/300/sequence?model=2076016

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