# NTSB Accident LAX99LA047
> **Bell 47G2** · 1998-12-12 · HELENDALE, CA, USA · NONE
## Event
- **NTSB number:** LAX99LA047
- **Event ID:** 20001211X11580
- **Type:** Accident
- **Date:** 1998-12-12
- **Location:** HELENDALE, CA, USA
- **Coordinates:** 34.739288, -117.349319
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Bell
- **Model:** 47G2
- **Registration:** N9021R
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DUSK
- **Weather:** VMC
## Probable cause

The pilot's failure to follow proper procedures to recover from main rotor blade aerodynamic retreating blade stall.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX99LA047) · AI Analytics · CC0 1.0*