# NTSB Accident IAD99LA024
> **Bell 47-G5** · 1998-12-14 · ESSEX JUNCTION, VT, USA · SERS
## Event
- **NTSB number:** IAD99LA024
- **Event ID:** 20001211X11572
- **Type:** Accident
- **Date:** 1998-12-14
- **Location:** ESSEX JUNCTION, VT, USA
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 2
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** Bell
- **Model:** 47-G5
- **Registration:** N8103J
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DUSK
- **Weather:** VMC
## Probable cause

the pilot's improper entry into the autorotation, which resulted in the loss of power and a low rotor rpm condition. Also causal was the pilot's improper execution of the autorotation which resulted in the hard landing.  Factors in the accident were the performance of the autorotation at dusk over rough terrain.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=IAD99LA024) · AI Analytics · CC0 1.0*