# NTSB Accident FTW01LA178
> **Air Tractor AT-401** · 2001-08-09 · Grand Coteau, LA, USA · NONE
## Event
- **NTSB number:** FTW01LA178
- **Event ID:** 20010813X01664
- **Type:** Accident
- **Date:** 2001-08-09
- **Location:** Grand Coteau, LA, USA
- **Coordinates:** 30.43053, -92.049499
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Air Tractor
- **Model:** AT-401
- **Registration:** N10140
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

the loss of engine power while maneuvering, which resulted from a fractured #4 cylinder head at the exhaust valve rocker arm boss.  A contributing factor was the lack of suitable terrain for the forced landing.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=FTW01LA178) · AI Analytics · CC0 1.0*