# NTSB Accident CHI05CA120
> **Brantly Helicopter B-2B** · 2005-05-20 · Lakeview, MI, USA · NONE
## Event
- **NTSB number:** CHI05CA120
- **Event ID:** 20050616X00795
- **Type:** Accident
- **Date:** 2005-05-20
- **Location:** Lakeview, MI, USA
- **Coordinates:** 43.45222, -85.264724
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Brantly Helicopter
- **Model:** B-2B
- **Registration:** N2274U
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The dual student failed to maintain adequate rotor rpm during the practice autorotation and the instructor's delay in attempting remedial action.  A factor associated with the accident was the soft terrain that was encountered.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI05CA120) · AI Analytics · CC0 1.0*