# NTSB Accident CHI91LA301
> **MCDONNELL DOUGLAS DC-9-82** · 1991-09-23 · CHICAGO, IL, USA · NONE
## Event
- **NTSB number:** CHI91LA301
- **Event ID:** 20001212X18074
- **Type:** Accident
- **Date:** 1991-09-23
- **Location:** CHICAGO, IL, USA
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 80
- **Total aboard:** 80
## Aircraft
- **Make:** MCDONNELL DOUGLAS
- **Model:** DC-9-82
- **Registration:** N442AA
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE FLIGHT CREW'S FAILURE TO MAINTAIN ADEQUATE CLEARANCE FROM OBSTACLES DURING GROUND OPERATIONS.  A RELATED FACTOR IS THE FAILURE OF THE DRIVERS OF THE ESCORT VEHICLE AND THE SEMI TRAILER TO FOLLOW ESTABLISHED PROCEDURES AND DIRECTIVES.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI91LA301) · AI Analytics · CC0 1.0*