# NTSB Accident MIA94FA125
> **BELL 47D1** · 1994-04-22 · MARATHON, FL, USA · FATL
## Event
- **NTSB number:** MIA94FA125
- **Event ID:** 20001206X01147
- **Type:** Accident
- **Date:** 1994-04-22
- **Location:** MARATHON, FL, USA
- **Coordinates:** 24.709703, -81.080535
## Injuries
- **Highest injury:** FATL
- **Fatal:** 2
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 3
## Aircraft
- **Make:** BELL
- **Model:** 47D1
- **Registration:** N9660
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

SEPARATION OF THE TAIL ROTOR GEARBOX AND TAIL ROTOR BLADES FOR AN UNDETERMINED REASON.  FACTORS RELATED TO THE ACCIDENT WERE: FAILURE OF MAINTENANCE PERSONNEL TO FOLLOW THE PROPER MAINTENANCE PROCEDURE AFTER A PREVIOUS TAIL ROTOR STRIKE, AND FAILURE TO CONDUCT A 100-HOUR INSPECTION WHEN DUE.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=MIA94FA125) · AI Analytics · CC0 1.0*