# NTSB Accident ANC15LA073
> **ROBINSON HELICOPTER R44** · 2015-09-19 · Fort Glenn, AK, USA · NONE
## Event
- **NTSB number:** ANC15LA073
- **Event ID:** 20150922X33847
- **Type:** Accident
- **Date:** 2015-09-19
- **Location:** Fort Glenn, AK, USA
- **Coordinates:** 53.166667, -168.383331
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** ROBINSON HELICOPTER
- **Model:** R44
- **Registration:** N7162R
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The separation of the tail rotor gearbox from the tailboom attachment point due to overstress loads imposed by a tail rotor blade imbalance as the result of impact with an undetermined object during low-level flight operations.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ANC15LA073) · AI Analytics · CC0 1.0*