No fatalities

BOEING 787 8 accident at Chicago, IL, 19 Oct 2023

Chicago, IL, United States

On October 19, 2023, a BOEING 787 8 operated by UNITED AIRLINES INC was involved in an aviation accident near Chicago, IL. No fatalities were reported. Investigators recorded the probable cause as: The flight crew’s misperception of the distance required to safely pass the hangar and failure to request additional ground handling support while taxiing, which resulted in a collision with a hangar. This summary draws on records from NTSB; 17 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-08-03Data APIEditorial standards
BOEING 787 8
Photo: AlexanderCraker / CC BY-SA 4.0, via Wikimedia Commons

Probable cause

The flight crew’s misperception of the distance required to safely pass the hangar and failure to request additional ground handling support while taxiing, which resulted in a collision with a hangar. Contributing to the accident was United Airlines Maintenance Ramp personnel’s ambiguous taxi instructions and lack of obstruction clearance guidance.

— NTSB Determination

Contributing factors

Flight crewMaintenance personnel