# NTSB investigations, IA: Low altitude operation/event

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 CEN26LA256](https://openairdocs.org/ntsb/CEN26LA256.md): Robinson Helicopter R44 II · Coralville, IA · Accident · No injuries · Class 4 · Limited · Final report · Jul 16, 2026 · N322TC · Substantial damage
  > The pilot’s failure to maintain clearance from a power line during a low-level aerial application flight.
- [NTSB CEN25LA285](https://openairdocs.org/ntsb/CEN25LA285.md): Air Tractor AT-802A · Walcott, IA · Accident · No injuries · Class 4 · Limited · Final report · Jul 23, 2025 · N802BF · Substantial damage
  > The pilot’s failure to maintain clearance from the crops during an aerial application flight.
- [NTSB CEN24FA287](https://openairdocs.org/ntsb/CEN24FA287.md): Bell 206 · Nashua, IA · Accident · 1 fatal · Class 3 · Field · Preliminary report · Jul 29, 2024 · N94XA · Substantial damage
  > On July 29, 2024 about 1330 central standard time, a Bell 206-B3 Helicopter, N94XA, was destroyed when it was involved in an accident near Nashua, Iowa. The pilot was fatally injured. The helicopter was operated as a Title 14 Code of Federal Regulations Part…
- [NTSB CEN23LA342](https://openairdocs.org/ntsb/CEN23LA342.md): Bell 206B · Denison, IA · Accident · 1 fatal · Class 4 · Limited · Final report · Jul 30, 2023 · N231RL · Substantial damage
  > The pilot’s inflight distraction, which resulted in his failure to see and avoid wires.
- [NTSB CEN23LA336](https://openairdocs.org/ntsb/CEN23LA336.md): Air Tractor AT-402B · Alta, IA · Accident · No injuries · Class 4 · Limited · Final report · Jul 29, 2023 · N402PR · Substantial damage
  > The airplane’s encounter with a dust devil, which resulted in a loss of lift, and subsequent collision with powerlines.
- [NTSB CEN23LA328](https://openairdocs.org/ntsb/CEN23LA328.md): Robinson Helicopter R44 · Hanlontown, IA · Accident · No injuries · Class 4 · Limited · Final report · Jul 26, 2023 · N467HA · Substantial damage
  > The pilot’s failure to maintain clearance from a cable during spray operations.
- [NTSB CEN22LA366](https://openairdocs.org/ntsb/CEN22LA366.md): Robinson Helicopter R44 II · Maynard, IA · Accident · No injuries · Class 4 · Limited · Final report · Aug 5, 2022 · N619RB · Substantial damage
  > An impact with a powerline as a result of an unexpected wind gust.
- [NTSB CEN22LA356](https://openairdocs.org/ntsb/CEN22LA356.md): Arbc Inc DBA Lindstrand 150A · Indianola, IA · Accident · Serious injuries · Class 4 · Limited · Final report · Jul 30, 2022 · N316EB · Minor damage
  > The pilot’s failure to maintain clearance from power lines during low-level maneuvering.
- [NTSB CEN22FA347](https://openairdocs.org/ntsb/CEN22FA347.md): Air Tractor AT502 · Ute, IA · Accident · 1 fatal · Class 3 · Field · Final report · Jul 30, 2022 · N501MW · Destroyed
  > The pilot’s inflight collision with a power line during aerial application.
- [NTSB CEN21LA350](https://openairdocs.org/ntsb/CEN21LA350.md): Robinson Helicopter R44 · Waukon, IA · Accident · Minor injuries · Class 4 · Limited · Final report · Aug 4, 2021 · N775AK · Substantial damage
  > The pilot’s failure to maintain adequate clearance from a powerline during an agricultural application pass.
- [NTSB CEN21LA339](https://openairdocs.org/ntsb/CEN21LA339.md): Robinson Helicopter R44 II · West Liberty, IA · Accident · Minor injuries · Class 4 · Limited · Final report · Jul 20, 2021 · N983HA · Substantial damage
  > The pilot’s failure to see and avoid a wire while maneuvering at low altitude during an aerial application flight, resulting in a collision with the wire.
- [NTSB CEN21LA313](https://openairdocs.org/ntsb/CEN21LA313.md): Air Tractor AT802 · Newell, IA · Accident · No injuries · Class 4 · Limited · Final report · Jul 11, 2021 · N949TM · Substantial damage
  > The pilot’s failure to maintain adequate clearance from crops during an agricultural flight.
- [NTSB CEN19FA259](https://openairdocs.org/ntsb/CEN19FA259.md): Air Tractor AT502 · Sumner, IA · Accident · 1 fatal · Class 3 · Field · Final report · Aug 8, 2019 · N6113C · Destroyed
  > The pilot’s impairment by medical conditions and/or medications, which resulted in the airplane’s impact with power lines and terrain.
- [NTSB GAA18CA453](https://openairdocs.org/ntsb/GAA18CA453.md): Robinson R44 · Elma, IA · Accident · Minor injuries · Data collection · Final report · Jul 27, 2018 · N466EL · Substantial damage
  > The pilot's failure maintain clearance from power lines during an agricultural application flight.
- [NTSB CEN17CA346](https://openairdocs.org/ntsb/CEN17CA346.md): Robinson Helicopter R44 II · Logan, IA · Accident · Minor injuries · Data collection · Final report · Jul 20, 2017 · N192E · Substantial damage
  > The pilot’s failure to maintain clearance from a wire during an agricultural application flight.
- [NTSB CEN14LA487](https://openairdocs.org/ntsb/CEN14LA487.md): Robinson Helicopter R44 II · Macedonia, IA · Accident · 1 fatal · Limited investigation · Final report · Sep 6, 2014 · N699TQ · Substantial damage
  > The pilot’s inadequate visual lookout, which resulted in a collision with a static line.
- [NTSB CEN13LA533](https://openairdocs.org/ntsb/CEN13LA533.md): Grumman G-164A · Atlantic, IA · Accident · Minor injuries · Limited investigation · Final report · Sep 6, 2013 · N7843 · Destroyed
  > The pilot’s delay in releasing product to reduce the airplane’s weight and improve its climb performance, which was reduced because of the high density altitude.
- [NTSB CEN11CA565](https://openairdocs.org/ntsb/CEN11CA565.md): Weatherly 201C · Bronson, IA · Accident · No injuries · Data collection · Final report · Aug 10, 2011 · N9054W · Substantial damage
  > The pilot's failure to maintain clearance from terrain while maneuvering during an aerial application flight.
- [NTSB CEN11CA535](https://openairdocs.org/ntsb/CEN11CA535.md): Texas Helicopter OH-13H/M74A · Joice, IA · Accident · No injuries · Data collection · Final report · Aug 1, 2011 · N51857 · Substantial damage
  > The pilot's failure to maintain clearance from the wire.
- [NTSB CEN10CA446](https://openairdocs.org/ntsb/CEN10CA446.md): Bell 206 · St. Olaf, IA · Accident · Minor injuries · Data collection · Final report · Jul 28, 2010 · N275RA · Substantial damage
  > The pilot's failure to maintain clearance from wires during the agricultural flight.
- [NTSB CEN10CA445](https://openairdocs.org/ntsb/CEN10CA445.md): Air Tractor AT-502B · Zwingle, IA · Accident · Minor injuries · Data collection · Final report · Jul 28, 2010 · N6030U · Substantial damage
  > The pilot's failure to maintain clearance from wires during the agricultural flight.
- [NTSB CEN10CA428](https://openairdocs.org/ntsb/CEN10CA428.md): Bell 206B · New Hampton, IA · Accident · No injuries · Data collection · Final report · Jul 23, 2010 · N40TA · Substantial damage
  > The pilot's failure to maintain clearance from wires.
- [NTSB CEN10CA402](https://openairdocs.org/ntsb/CEN10CA402.md): Grumman Acft ENG Cor-Schweizer G-164B · Independence, IA · Accident · No injuries · Data collection · Final report · Jul 13, 2010 · N8260K · Substantial damage
  > The pilot's failure to pay attention to the power lines and his subsequent failure to maintain clearance from the corn field during the aerial application flight.
- [NTSB CEN09CA483](https://openairdocs.org/ntsb/CEN09CA483.md): Piper PA-25-235 · Royal, IA · Accident · Minor injuries · Data collection · Final report · Aug 3, 2009 · N6701Z · Substantial damage
  > The pilot's failure to maintain clearance from the crop during an aerial application maneuver.
- [NTSB CEN09LA492](https://openairdocs.org/ntsb/CEN09LA492.md): Stirling Starduster · Earlham, IA · Accident · Serious injuries · Limited investigation · Final report · Aug 1, 2009 · N1XY · Substantial damage
  > The pilot's failure to maintain clearance from the ground during an aerobatic maneuver.
- [NTSB CEN09LA409](https://openairdocs.org/ntsb/CEN09LA409.md): Cessna 172 · Latimer, IA · Accident · 1 fatal · Limited investigation · Final report · Jul 3, 2009 · N8138B · Substantial damage
  > The pilot's failure to maintain clearance from the power line while flying at a low altitude.
- [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.

## 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."eventStateOrRegion" = 'IA' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT e.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e."isDefiningEvent" AND e."tier2Number" = '220')
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/220/cases?state=IA

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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.