# NTSB investigations: Air Tractor AT-401: Loss of engine power

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 DFW07LA138](https://openairdocs.org/ntsb/DFW07LA138.md): Air Tractor AT-401 · Oak Grove, LA · Accident · No injuries · Limited investigation · Final report · Jun 6, 2007 · N92PK · Substantial damage
  > A complete loss of power due to failure of the impeller drive gear train and displacement of the blower spring drive mechanism, which resulted in seizure of the propeller shaft/crankshaft. Also causal was the failure of the phenolic separator bracket of the…
- [NTSB FTW04LA130](https://openairdocs.org/ntsb/FTW04LA130.md): Air Tractor AT-401 · San Angelo, TX · Accident · No injuries · Limited investigation · Final report · May 19, 2004 · N4508Y · Destroyed
  > The loss of engine power for undetermined reasons. A contributing factor was the soft terrain encountered during the aborted takeoff.
- [NTSB ATL01LA099](https://openairdocs.org/ntsb/ATL01LA099.md): Air Tractor AT-401 · Batesville, MS · Accident · Minor injuries · Limited investigation · Final report · Aug 28, 2001 · N91922 · Destroyed
  > The loss of engine power for undetermined reasons. A factor was the lack of suitable terrain for an emergency landing.
- [NTSB SEA99LA075](https://openairdocs.org/ntsb/SEA99LA075.md): Air Tractor AT-401 · Jerome, ID · Accident · No injuries · Limited investigation · Final report · May 27, 1999 · N6024M · Substantial damage
  > Fuel exhaustion. Carburetor contamination and rough terrain were factors.
- [NTSB ATL98LA117](https://openairdocs.org/ntsb/ATL98LA117.md): Air Tractor 401 · Holly Bluff, MS · Accident · No injuries · Limited investigation · Final report · Aug 22, 1998 · N10103 · Substantial damage
  > The malfunction of the carburetor which resulted in improper fuel flow to the engine.
- [NTSB MIA98LA181](https://openairdocs.org/ntsb/MIA98LA181.md): Air Tractor AT-401 · Rich, MS · Accident · No injuries · Limited investigation · Final report · May 24, 1998 · N1008Y · Substantial damage
  > a loss of engine power for an undetermined reason, resulting in a forced landing and subsequent impact with rough terrain.
- [NTSB CHI98LA118](https://openairdocs.org/ntsb/CHI98LA118.md): Air Tractor AT-401 · Highmore, SD · Accident · No injuries · Limited investigation · Final report · Apr 3, 1998 · N1008T · Substantial damage
  > the pilot failed to abort the takeoff in a timely manner and could not stop on the runway.
- [NTSB FTW94LA306](https://openairdocs.org/ntsb/FTW94LA306.md): Air Tractor AT-401 · Mcgehee, AR · Accident · No injuries · Limited investigation · Final report · Sep 20, 1994 · N4549N · Substantial damage
  > The loss of engine power due to undetermined reasons. A factor was the unsuitable terrain.
- [NTSB MIA94LA168](https://openairdocs.org/ntsb/MIA94LA168.md): Air Tractor AT-401 · Walls, MS · Accident · Minor injuries · Limited investigation · Final report · Jun 27, 1994 · N45332 · Substantial damage
  > The partial loss of engine power for undetermined reasons. The sandy terrain was a factor.
- [NTSB MIA91LA101](https://openairdocs.org/ntsb/MIA91LA101.md): Air Tractor AT-401 · Avon, MS · Accident · Serious injuries · Limited investigation · Final report · Mar 15, 1991 · N73135 · Substantial damage
  > Loss of engine power for undetermined reasons during a turn while on an aerial application flight. Contributing to the accident was failure of the left magneto due to failure of a phenolic gear which drives the rotating magnet.
- [NTSB FTW90DPG12](https://openairdocs.org/ntsb/FTW90DPG12.md): Air Tractor AT-401 · Jacksonville, AR · Accident · No injuries · Final report · Aug 27, 1990 · N7318C · Substantial damage
  > A loss of engine power due to unknown causes. A factor was the unsuitable terrain.

## 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_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 350))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=0390204&occurrence=350

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