# NTSB Accident WPR11GA431
> **BELL 205** · 2011-09-04 · Tehachapi, CA, USA · MINR
## Event
- **NTSB number:** WPR11GA431
- **Event ID:** 20110906X05207
- **Type:** Accident
- **Date:** 2011-09-04
- **Location:** Tehachapi, CA, USA
- **Coordinates:** 35.064445, -118.423614
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** BELL
- **Model:** 205
- **Registration:** N205WW
- **FAR Part:** 133
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot's inability to adequately execute an emergency autorotation due to the flight's low altitude during external load operations, which resulted in a hard landing. Contributing to the accident was a torsionally overstressed tachometer shaft, which sent erroneous engine rpm readings to the cockpit.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR11GA431) · AI Analytics · CC0 1.0*