# NTSB Accident SEA04LA139
> **Grumman G-164A** · 2004-07-23 · Nyssa, OR, USA · MINR
## Event
- **NTSB number:** SEA04LA139
- **Event ID:** 20040803X01132
- **Type:** Accident
- **Date:** 2004-07-23
- **Location:** Nyssa, OR, USA
- **Coordinates:** 43.886943, -117.08361
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** Grumman
- **Model:** G-164A
- **Registration:** N7220
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The failure (fracture) of the number four cylinder head during an aerial application run.  Factors include the soft crop-covered terrain.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA04LA139) · AI Analytics · CC0 1.0*