# NTSB Accident WPR10LA117
> **BELL 47G-4A** · 2010-01-22 · Shafter, CA, USA · MINR
## Event
- **NTSB number:** WPR10LA117
- **Event ID:** 20100125X12744
- **Type:** Accident
- **Date:** 2010-01-22
- **Location:** Shafter, CA, USA
- **Coordinates:** 35.473331, -119.242774
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** BELL
- **Model:** 47G-4A
- **Registration:** N28938
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The loss of a main rotor blade counterweight due to corrosion. Contributing to the accident was the failure of the operator to perform the initial and recurrent inspections required by a Service Bulletin to detect the corrosion in the counterweight.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR10LA117) · AI Analytics · CC0 1.0*