# NTSB investigations: Air Tractor AT-602: 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 ERA26LA195](https://openairdocs.org/ntsb/ERA26LA195.md): Air Tractor AT-602 · Bealeton, VA · Accident · No injuries · Class 3 · Limited · Preliminary report · May 1, 2026 · N602RH · Substantial damage
  > On May 1, 2026, at 1230 eastern daylight time, an Air Tractor AT-602, N602RH, was substantially damaged when it was involved in an accident near Bealeton, Virginia. The pilot was not injured. The airplane was operated as a Title 14 Code of Federal Regulations…
- [NTSB CEN20LA109](https://openairdocs.org/ntsb/CEN20LA109.md): Air Tractor AT 602 · Dumas, AR · Accident · No injuries · Class 3 · Limited · Final report · Feb 25, 2020 · N5197Y · Substantial damage
  > The pilot’s failure to maintain clearance from a power line pole during a low-level aerial application flight, which resulted in impact with the bracket and a subsequent forced landing.
- [NTSB WPR17LA042](https://openairdocs.org/ntsb/WPR17LA042.md): Air Tractor AT 602 · Willows, CA · Accident · No injuries · Limited investigation · Final report · Dec 27, 2016 · N602L · Substantial damage
  > The decision of the maintenance facility mechanic to conduct maintenance without reference to the applicable manufacturer’s guidance, which resulted in the improper reassembly and subsequent failure of the engine compressor bleed valve, which in turn…
- [NTSB CEN09LA401](https://openairdocs.org/ntsb/CEN09LA401.md): Air Tractor AT-602 · Knobel, AR · Accident · No injuries · Limited investigation · Final report · Jun 30, 2009 · N5192T · Substantial damage
  > The failure of the P-3 tube resulting in the loss of engine power.

## 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 ('0390309')
    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=0390309

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