# NTSB Accident LAX01FA236
> **Bell 47D-1** · 2001-07-06 · RIVERSIDE, CA, USA · NONE
## Event
- **NTSB number:** LAX01FA236
- **Event ID:** 20010713X01427
- **Type:** Accident
- **Date:** 2001-07-06
- **Location:** RIVERSIDE, CA, USA
- **Coordinates:** 33.95, -117.449996
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Bell
- **Model:** 47D-1
- **Registration:** N64580
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The engine crankshaft's failure as the result of fatigue cracking initiated by surface damage and localized overheating due to the installation at overhaul of incorrectly sized bearings.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX01FA236) · AI Analytics · CC0 1.0*