# NTSB Accident WPR09MA159
> **PILATUS PC-12/45** · 2009-03-22 · Butte, MT, USA · FATL
## Event
- **NTSB number:** WPR09MA159
- **Event ID:** 20090322X90442
- **Type:** Accident
- **Date:** 2009-03-22
- **Location:** Butte, MT, USA
- **Coordinates:** 45.95, -112.483329
## Injuries
- **Highest injury:** FATL
- **Fatal:** 14
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 14
## Aircraft
- **Make:** PILATUS
- **Model:** PC-12/45
- **Registration:** N128CM
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

(1) the pilot's failure to ensure that a fuel system icing inhibitor was added to the fuel before the flights on the day of the accident; (2) his failure to take appropriate remedial actions after a low fuel pressure state (resulting from icing within the fuel system) and a lateral fuel imbalance developed, including diverting to a suitable airport before the fuel imbalance became extreme; and (3) a loss of control while the pilot was maneuvering the left wing-heavy airplane near the approach end of the runway.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR09MA159) · AI Analytics · CC0 1.0*