# NTSB investigations: Air Tractor AT-401, 1990

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 MIA91LA033](https://openairdocs.org/ntsb/MIA91LA033.md): Air Tractor AT401 · Belle Glade, FL · Accident · Minor injuries · Limited investigation · Final report · Nov 26, 1990 · N1005J · Destroyed
  > The pilot failed to maintain airspeed, and stalled the airplane, resulting in a uncontrolled descent, and collision with the terrain.
- [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.
- [NTSB FTW90DPG11](https://openairdocs.org/ntsb/FTW90DPG11.md): Air Tractor AT401 · Altheimer, AR · Accident · No injuries · Final report · Aug 23, 1990 · N10192 · Substantial damage
  > The pilot's failure to align the airplane with the runway during landing.
- [NTSB LAX90DXQ03](https://openairdocs.org/ntsb/LAX90DXQ03.md): Air Tractor AT-401 · Tule Lake, CA · Accident · Minor injuries · Final report · Aug 4, 1990 · N45116 · Substantial damage
  > An engine failure due to mechanical failure of the distributor.
- [NTSB LAX90DVA07](https://openairdocs.org/ntsb/LAX90DVA07.md): Air Tractor AT-401 · San Joaquin, CA · Accident · 1 fatal · Final report · Jul 26, 1990 · N7315S · Substantial damage
  > The failure of the no. 4 cylinder head.
- [NTSB SEA90LA105](https://openairdocs.org/ntsb/SEA90LA105.md): Air Tractor AT-401 · Jerome, ID · Accident · No injuries · Limited investigation · Final report · Jun 21, 1990 · N4530N · Substantial damage
  > The pilot did not maintain a proper altitude while maneuvering to reverse direction.
- [NTSB MKC90LA081](https://openairdocs.org/ntsb/MKC90LA081.md): Air Tractor AT-401 · Hornersville, MO · Accident · No injuries · Limited investigation · Final report · Apr 5, 1990 · N1015A · Substantial damage
  > Failure of an engine cylinder.

## 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 year(c."eventDate") = 1990
  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&year=1990

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