# NTSB Accident CEN15LA399
> **Weatherly Aviation Company Inc 620B** · 2015-08-26 · Hancock, WI, USA · FATL
## Event
- **NTSB number:** CEN15LA399
- **Event ID:** 20150904X84033
- **Type:** Accident
- **Date:** 2015-08-26
- **Location:** Hancock, WI, USA
- **Coordinates:** 44.098331, -89.591392
## Injuries
- **Highest injury:** FATL
- **Fatal:** 1
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** Weatherly Aviation Company Inc
- **Model:** 620B
- **Registration:** N2005C
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The in-flight failure of the left wing lower forward attach point under normal loading conditions due to corrosion and fatigue cracking in the center section hinge brackets. Contributing to the accident was the operator's inadequate maintenance and overweight operation of the airplane, and the manufacturer's inadequate guidance to detect and prevent corrosion and fatigue cracking.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN15LA399) · AI Analytics · CC0 1.0*