# NTSB Incident CHI98IA007
> **Boeing 737-200** · 1997-10-04 · CHICAGO, IL, USA · NONE
## Event
- **NTSB number:** CHI98IA007
- **Event ID:** 20001208X08961
- **Type:** Incident
- **Date:** 1997-10-04
- **Location:** CHICAGO, IL, USA
- **Coordinates:** 41.780765, -87.769241
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 50
- **Total aboard:** 50
## Aircraft
- **Make:** Boeing
- **Model:** 737-200
- **Registration:** N129SW
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

an improper repair to a crack in a brake flange hole on the left main landing gear outboard axle, and subsequent fatigue failure of the axle.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI98IA007) · AI Analytics · CC0 1.0*