# NTSB investigations: Air Tractor AT-301: Powerplant sys/comp malf/fail

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 ERA22LA224](https://openairdocs.org/ntsb/ERA22LA224.md): Air Tractor AT-301 · Somerville, TN · Accident · Minor injuries · Class 3 · Limited · Final report · May 11, 2022 · N31580 · Substantial damage
  > The inadequate inspection and maintenance of the engine exhaust system, which resulted in an in-flight fire.
- [NTSB CEN12LA589](https://openairdocs.org/ntsb/CEN12LA589.md): Air Tractor AT-301 · Ralls, TX · Accident · Minor injuries · Limited investigation · Final report · Aug 29, 2012 · N23960 · Substantial damage
  > The total loss of engine power due to a fatigue failure of the rocker arm journal casting of the rocker arm cap.
- [NTSB CEN09LA602](https://openairdocs.org/ntsb/CEN09LA602.md): Air Tractor AT-301A · New Miner, WI · Accident · Minor injuries · Limited investigation · Final report · Aug 22, 2009 · N3651R · Substantial damage
  > A total loss of engine power due to the fatigue failure of the engine torsion shaft. Contributing to the accident was the chrome plating of the shaft by an undetermined maintenance/overhaul facility.
- [NTSB CEN09CA535](https://openairdocs.org/ntsb/CEN09CA535.md): Air Tractor AT-301 · Leland, IL · Accident · No injuries · Data collection · Final report · Aug 17, 2009 · N73102 · Substantial damage
  > A total loss of engine power in flight due to a loss of engine oil as a result of the separation of the propeller hub components for undetermined reasons.
- [NTSB WPR09LA085](https://openairdocs.org/ntsb/WPR09LA085.md): Air Tractor AT-301 · Beaver, UT · Accident · Minor injuries · Limited investigation · Final report · Jan 15, 2009 · N3170C · Substantial damage
  > A loss of engine power while maneuvering due to a sheared propeller blade's pitch change link. Contributing to the accident was lack of suitable terrain for the forced landing.

## 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 ('0390103', '0390105')
    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" = '340' 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/340/sequence?model=0390103

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