# NTSB Accident MIA96LA176
> **Hiller OH-23C** · 1996-07-04 · MARATHON, FL, USA · MINR
## Event
- **NTSB number:** MIA96LA176
- **Event ID:** 20001208X06310
- **Type:** Accident
- **Date:** 1996-07-04
- **Location:** MARATHON, FL, USA
- **Coordinates:** 24.710103, -81.080039
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 2
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** Hiller
- **Model:** OH-23C
- **Registration:** N301CH
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DUSK
- **Weather:** VMC
## Probable cause

Improper repair of a previous crack in the blue main rotor blade by unknown persons; improper inspection of the main rotor blades by maintenance personnel, following a reported vibration problem; and subsequent failure of the main rotor blade, which resulted in an uncontrolled collision with the terrain.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=MIA96LA176) · AI Analytics · CC0 1.0*