# NTSB Accident CHI06CA221
> **Air Tractor AT-400** · 2006-07-31 · Springfield, MN, USA · NONE
## Event
- **NTSB number:** CHI06CA221
- **Event ID:** 20060831X01269
- **Type:** Accident
- **Date:** 2006-07-31
- **Location:** Springfield, MN, USA
- **Coordinates:** 44.214443, -94.999168
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Air Tractor
- **Model:** AT-400
- **Registration:** N23720
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot's inability to maintain directional control of the airplane as a result of the partial failure of the tail wheel assembly.  A factor associated with the accident was the crop that the airplane contacted.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI06CA221) · AI Analytics · CC0 1.0*