# NTSB Accident CEN11LA606
> **BOEING A75N1(PT17)** · 2011-08-21 · Mt. Clemens, MI, USA · FATL
## Event
- **NTSB number:** CEN11LA606
- **Event ID:** 20110830X71207
- **Type:** Accident
- **Date:** 2011-08-21
- **Location:** Mt. Clemens, MI, USA
- **Coordinates:** 42.608333, -82.835556
## Injuries
- **Highest injury:** FATL
- **Fatal:** 1
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 3
## Aircraft
- **Make:** BOEING
- **Model:** A75N1(PT17)
- **Registration:** N49739
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** —
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The wing walker’s decision to release his grip of the airplane during an attempted aerial transfer from airplane to helicopter before both aircraft achieved the proper relative positioning for the transfer.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN11LA606) · AI Analytics · CC0 1.0*