# NTSB Incident OPS06IA007
> **Boeing 737-300** · 2006-03-23 · Chicago, IL, USA · NONE
## Event
- **NTSB number:** OPS06IA007
- **Event ID:** 20060411X00417
- **Type:** Incident
- **Date:** 2006-03-23
- **Location:** Chicago, IL, USA
- **Coordinates:** 42.030773, -87.900802
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 121
- **Total aboard:** 121
## Aircraft
- **Make:** Boeing
- **Model:** 737-300
- **Registration:** N309UA
- **FAR Part:** 121
- **Engines:** —
- **Damage:** —
## Conditions
- **Light:** —
- **Weather:** VMC
## Probable cause

The probable cause of this incident was the ORD tower local controller's failure to provide sufficient separation between two aircraft departing intersecting runways.  Contributing to the incident was the ORD local monitor's failure to monitor the situating and advise the local controller of the developing situation.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=OPS06IA007) · AI Analytics · CC0 1.0*