# NTSB Accident WPR11LA320
> **SCHWEIZER AIRCRAFT CORP G-164B** · 2011-07-09 · Yuba City, CA, USA · NONE
## Event
- **NTSB number:** WPR11LA320
- **Event ID:** 20110710X15524
- **Type:** Accident
- **Date:** 2011-07-09
- **Location:** Yuba City, CA, USA
- **Coordinates:** 39.068332, -121.735275
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** SCHWEIZER AIRCRAFT CORP
- **Model:** G-164B
- **Registration:** N7503L
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

High-cycle fatigue on the 1st-stage compressor blade retaining ring, which resulted in the ring’s fracture and a subsequent loss of engine power.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR11LA320) · AI Analytics · CC0 1.0*