# NTSB Accident DEN89LA084
> **HILLER UH-12E** · 1989-03-09 · GOLDEN, CO, USA · NONE
## Event
- **NTSB number:** DEN89LA084
- **Event ID:** 20001213X27876
- **Type:** Accident
- **Date:** 1989-03-09
- **Location:** GOLDEN, CO, USA
- **Coordinates:** 39.730518, -105.199211
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** HILLER
- **Model:** UH-12E
- **Registration:** N7411N
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

IMPROPER IN-FLIGHT PLANNING/DECISION BY THE CFI WHICH RESULTED IN LOSS OF TAIL ROTOR EFFECTIVENESS AND LOSS OF DIRECTIONAL CONTROL. CONTRIBUTING FACTORS WERE HIGH DENSITY ALTITUDE, TAILWIND, AND ROUGH/UNEVEN TERRAIN.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DEN89LA084) · AI Analytics · CC0 1.0*