Casualties unknown

Airplane Strikes Parked Semi-Trailer During Ground Operations (N442AA)

Chicago, IL, US

On September 23, 1991, a Mcdonnell Douglas DC-9-82 (registration N442AA) operated by American Airlines was involved in an aviation accident near Chicago, IL. Investigators recorded the probable cause as: 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. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 3 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-10Data APIEditorial standards
Aircraft registered N442AA
Aircraft registered N442AA. Photo: Ken Fielding / CC BY-SA 3.0, via Wikimedia Commons

After landing, an airplane's left wing struck a parked semi-trailer on the taxiway. The semi had been escorted from a construction site but was led along the shoulder instead of established routes, and had stopped after hitting a concrete bumper.

Incident Overview

A commercial airplane struck a parked semi-trailer during ground operations after landing. The semi-trailer had been escorted from a construction site on the airport by a contracted escort service. The escort vehicle led the semi along the shoulder of the taxiway instead of following established routes.

Sequence of Events

During the escort, the semi-trailer struck a concrete bumper. The driver stopped the vehicle to assess possible damage. At that point, the driver estimated the semi-trailer was approximately 100 feet from the edge of the taxiway. Shortly thereafter, the airplane's left wing made contact with the parked trailer.

Crew and Escort Actions

The flight crew reported that they believed they had adequate clearance to taxi past the parked trailer until just prior to impact. No further details about the escort or ground crew actions were provided in the source.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X18074. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.