# NTSB Accident CHI05CA146
> **Cessna 172N** · 2005-06-13 · Madison, WI, USA · NONE
## Event
- **NTSB number:** CHI05CA146
- **Event ID:** 20050715X01037
- **Type:** Accident
- **Date:** 2005-06-13
- **Location:** Madison, WI, USA
- **Coordinates:** 43.13972, -89.337501
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Cessna
- **Model:** 172N
- **Registration:** N6454J
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot's improper pre-flight which resulted in the control lock not being removed and his subsequent inability to control the airplane.  The unmarked control lock and the FBO's failure to replace the unmarked control lock were factors in the accident.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI05CA146) · AI Analytics · CC0 1.0*