# NTSB Incident CHI91IA120
> **CESSNA 172RG** · 1991-04-02 · WEST CHICAGO, IL, USA · NONE
## Event
- **NTSB number:** CHI91IA120
- **Event ID:** 20001212X16751
- **Type:** Incident
- **Date:** 1991-04-02
- **Location:** WEST CHICAGO, IL, USA
- **Coordinates:** 41.879085, -88.219779
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** CESSNA
- **Model:** 172RG
- **Registration:** N9592B
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

FAILURE OF THE SPLINED SHAFT ON THE RIGHT MAIN LANDING GEAR PIVOT ASSEMBLY.  A FACTOR RELATED TO THE INCIDENT WAS INADEQUATE DESIGN OF THE LANDING GEAR PIVOT ASSEMBLY.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI91IA120) · AI Analytics · CC0 1.0*