# NTSB Incident ENG24LA028
> **BELL 407** · 2024-07-26 · Oktaha, OK, USA · NONE
## Event
- **NTSB number:** ENG24LA028
- **Event ID:** 20240806194854
- **Type:** Incident
- **Date:** 2024-07-26
- **Location:** Oktaha, OK, USA
- **Coordinates:** 35.580768, -95.60749
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 3
- **Total aboard:** 3
## Aircraft
- **Make:** BELL
- **Model:** 407
- **Registration:** N793SF
- **FAR Part:** 135
- **Engines:** 1
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** Unk
## Probable cause

The loss of engine power due to high cycle fatigue failure of a power turbine stage 3 turbine wheel blade.  The resulting engine imbalance caused a decoupling of the gas producer stage 1 and stage 2 turbine wheels leading to a stage 1 turbine overspeed and subsequent turbine wheel burst.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ENG24LA028) · AI Analytics · CC0 1.0*