# NTSB Accident ATL96LA104
> **Hiller UH-12E** · 1996-07-11 · COTTONDALE, FL, USA · NONE
## Event
- **NTSB number:** ATL96LA104
- **Event ID:** 20001208X06152
- **Type:** Accident
- **Date:** 1996-07-11
- **Location:** COTTONDALE, FL, USA
- **Coordinates:** 30.789545, -85.370452
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Hiller
- **Model:** UH-12E
- **Registration:** N102HT
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

failure of the main rotor drive torsional coupling and inner gimbal ring, which resulted in jamming of the flight controls during an attempted autorotation.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ATL96LA104) · AI Analytics · CC0 1.0*