# NTSB Incident OPS12IA167
> **LEARJET INC 45** · 2011-12-01 · Chicago, IL, USA · NONE
## Event
- **NTSB number:** OPS12IA167
- **Event ID:** 20111209X35527
- **Type:** Incident
- **Date:** 2011-12-01
- **Location:** Chicago, IL, USA
- **Coordinates:** 41.779296, -87.770683
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 85
- **Total aboard:** 85
## Aircraft
- **Make:** LEARJET INC
- **Model:** 45
- **Registration:** N570AM
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** —
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The tower local controller did not ensure that the runway was clear of conflict before directing the B737 to cross the runway, and other air traffic control personnel did not effectively intervene when the separation between the two airplanes became questionable.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=OPS12IA167) · AI Analytics · CC0 1.0*