# NTSB Accident CHI94LA350
> **ULTRALIGHT CHALLENGER II** · 1994-09-20 · PRINCETON, IL, USA · NONE
## Event
- **NTSB number:** CHI94LA350
- **Event ID:** 20001206X02231
- **Type:** Accident
- **Date:** 1994-09-20
- **Location:** PRINCETON, IL, USA
- **Coordinates:** 41.370502, -89.459381
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** ULTRALIGHT
- **Model:** CHALLENGER II
- **Registration:** UNREG
- **FAR Part:** 103
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

INADEQUATE DIRECTIONAL STABILITY OF THE AIRCRAFT (DUE TO INSTALLATION OF LEXAN COCKPIT ENCLOSURE DOORS), WHICH PRECIPITATED A LOSS OF DIRECTIONAL CONTROL.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI94LA350) · AI Analytics · CC0 1.0*