# NTSB Accident SEA06FA068
> **Beech C99** · 2006-03-18 · Butte, MT, USA · FATL
## Event
- **NTSB number:** SEA06FA068
- **Event ID:** 20060329X00363
- **Type:** Accident
- **Date:** 2006-03-18
- **Location:** Butte, MT, USA
- **Coordinates:** 46.050743, -112.540428
## Injuries
- **Highest injury:** FATL
- **Fatal:** 2
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** Beech
- **Model:** C99
- **Registration:** N54RP
- **FAR Part:** 135
- **Engines:** 2
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** IMC
## Probable cause

The second pilot's failure to follow the published instrument approach procedure and the captain/PIC's inadequate supervision.  Snow and mountain obscuration were factors.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA06FA068) · AI Analytics · CC0 1.0*