# NTSB Accident CHI91LA300
> **ATR ATR 42-300** · 1991-09-14 · MUSKEGON, MI, USA · SERS
## Event
- **NTSB number:** CHI91LA300
- **Event ID:** 20001212X18073
- **Type:** Accident
- **Date:** 1991-09-14
- **Location:** MUSKEGON, MI, USA
- **Coordinates:** 43.219978, -86.250244
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 25
- **Total aboard:** 26
## Aircraft
- **Make:** ATR
- **Model:** ATR 42-300
- **Registration:** N243AT
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** —
## Conditions
- **Light:** DUSK
- **Weather:** VMC
## Probable cause

THE FAILURE, FOR REASONS UNKNOWN, OF THE NUMBER FOUR BEARING IN THE HIGH PRESSURE SPOOL OF THE ENGINE.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI91LA300) · AI Analytics · CC0 1.0*