# NTSB Accident ANC06LA137
> **Aerospatiale SA319B** · 2006-09-24 · Port Alsworth, AK, USA · NONE
## Event
- **NTSB number:** ANC06LA137
- **Event ID:** 20060928X01424
- **Type:** Accident
- **Date:** 2006-09-24
- **Location:** Port Alsworth, AK, USA
- **Coordinates:** 60.24139, -156.404449
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Aerospatiale
- **Model:** SA319B
- **Registration:** N119PH
- **FAR Part:** 133
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot's failure to adequately secure the external load rigging of an airplane that was suspended from the helicopter, which resulted in a load shift during cruise flight, producing an abrupt nose-down attitude, and the severing of the tailrotor drive shaft by the main rotor blades.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ANC06LA137) · AI Analytics · CC0 1.0*