# NTSB investigations: Air Tractor AT-401: Collision with terr/obj (non-CFIT)

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 CEN21LA319](https://openairdocs.org/ntsb/CEN21LA319.md): Air Tractor AT-401 · Carroll, IA · Accident · No injuries · Class 3 · Limited · Final report · Jul 13, 2021 · N7315P · Substantial damage
  > The wear-related failure of the airframe fuel boost pump, which resulted in fuel starvation and a loss of engine power.
- [NTSB GAA15CA117](https://openairdocs.org/ntsb/GAA15CA117.md): Air Tractor AT 401 · Wall, SD · Accident · No injuries · Data collection · Final report · Jun 9, 2015 · N4549E · Substantial damage
  > The pilot's failure to adjust the airplane's useful load to compensate for the high temperature, which resulted in an insufficient climb rate to clear surrounding terrain, and a runway excursion.
- [NTSB CEN13LA152](https://openairdocs.org/ntsb/CEN13LA152.md): Air Tractor AT-401 · Victoria, TX · Accident · No injuries · Limited investigation · Final report · Jan 31, 2013 · N9190B · Substantial damage
  > The mechanical failure of the engine power section, which resulted in a loss of engine power.
- [NTSB CEN12LA344](https://openairdocs.org/ntsb/CEN12LA344.md): Air Tractor AT401 · Kenmare, ND · Accident · No injuries · Limited investigation · Final report · Jun 4, 2012 · N4547Q · Substantial damage
  > The pilot's failure to maintain directional control during an aborted takeoff.
- [NTSB WPR11LA386](https://openairdocs.org/ntsb/WPR11LA386.md): Air Tractor AT-401 · Hardin, MT · Accident · No injuries · Limited investigation · Final report · Aug 16, 2011 · N1012T · Substantial damage
  > The loss of engine power during takeoff due to the fatigue failure of the turbine wheel blades, which resulted from inadequate maintenance and inspections.
- [NTSB CEN10LA503](https://openairdocs.org/ntsb/CEN10LA503.md): Air Tractor AT-401 · Castroville, TX · Accident · No injuries · Limited investigation · Final report · Aug 26, 2010 · N4530L · Substantial damage
  > A loss of engine power due to the failure of the torque sensor bearing.
- [NTSB CEN10LA420](https://openairdocs.org/ntsb/CEN10LA420.md): Air Tractor AT-401 · Toulin, IL · Accident · No injuries · Limited investigation · Final report · Jul 21, 2010 · N45297 · Substantial damage
  > A partial loss of engine power as a result of a cracked cylinder and the reduced visibility due to the oil-covered windshield.
- [NTSB CHI08CA213](https://openairdocs.org/ntsb/CHI08CA213.md): Air Tractor AT-401 · Ida Grove, IA · Accident · No injuries · Data collection · Final report · Aug 12, 2008 · N45029 · Substantial damage
  > A failure of the turbocharger blower which resulted in the partial loss of power. Factors associated with the accident were the low altitude of the airplane and the embankment.
- [NTSB CHI08CA220](https://openairdocs.org/ntsb/CHI08CA220.md): Air Tractor AT-401 · Lake View, IA · Accident · Minor injuries · Data collection · Final report · Jul 26, 2008 · N9193F · Substantial damage
  > The pilot not obtaining/maintaining altitude/clearance from the power line while performing an aerial application maneuver.
- [NTSB DFW08CA146](https://openairdocs.org/ntsb/DFW08CA146.md): Air Tractor 401-0860 · Mumford, TX · Accident · No injuries · Data collection · Final report · May 16, 2008 · N15420 · Substantial damage
  > A total loss of engine power for undetermined reasons.

## 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 ('0390204', '0390209')
    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" = '470' 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/470/sequence?model=0390204

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.