# NTSB investigations: Air Tractor AT-401, NE

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 CEN25LA191](https://openairdocs.org/ntsb/CEN25LA191.md): Air Tractor AT-401 · Hamlet, NE · Accident · No injuries · Class 4 · Limited · Final report · Jun 2, 2025 · N60057 · Substantial damage
  > The pilot's failure to maintain clearance from the power lines during low altitude maneuvering.
- [NTSB CHI01IA246](https://openairdocs.org/ntsb/CHI01IA246.md): Air Tractor AT-401 · Kenesaw, NE · Incident · No injuries · Incident investigation · Final report · Jul 27, 2001 · N4553K · Minor damage
  > The propeller blade fatigue leading to its tip separating during an aerial application. Factors were no suitable terrain for an emergency landing, high vegetation, and soft terrain encountered during the emergency landing.
- [NTSB CHI95LA258](https://openairdocs.org/ntsb/CHI95LA258.md): Air Tractor AT-401 · Aurora, NE · Accident · No injuries · Limited investigation · Final report · Aug 4, 1995 · N4543F · Substantial damage
  > the cracked engine assembly that caused the power loss during a critical phase of flight. Factors associated with this accident were the restricted airplane performance due to the power loss, the airplane's altitude was too low, and remedial action, by, the…
- [NTSB CHI93LA170](https://openairdocs.org/ntsb/CHI93LA170.md): Air Tractor AT-401 · Oconto, NE · Accident · Minor injuries · Limited investigation · Final report · May 14, 1993 · N4503U · Destroyed
  > The pilot's inability to maintain altitude after encountering a downdraft.

## 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."eventStateOrRegion" = 'NE' 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 ('0390204', '0390209'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=0390204&state=NE

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