# NTSB Accident CHI97LA004
> **Bell 47G-5** · 1996-10-06 · NUNDA, SD, USA · NONE
## Event
- **NTSB number:** CHI97LA004
- **Event ID:** 20001208X06850
- **Type:** Accident
- **Date:** 1996-10-06
- **Location:** NUNDA, SD, USA
- **Coordinates:** 44.159339, -97.010368
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Bell
- **Model:** 47G-5
- **Registration:** N7925J
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

failure of maintenance personnel to properly torque the six accessory drive bolts, which resulted in fatigue failure of the undertorqued bolts.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI97LA004) · AI Analytics · CC0 1.0*