No fatalities

BOEING 767-322 accident at Chantilly, VA, 3 Aug 2023

Chantilly, VA, United States

On August 3, 2023, a BOEING 767-322 operated by UNITED AIRLINES INC was involved in an aviation accident near Chantilly, VA. No fatalities were reported. Investigators recorded the probable cause as: Improper overhaul of the trunnion cross-pin hole that resulted in the development of stress corrosion cracking and eventual failure of the right forward trunnion. 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 767-322
Photo: Tosaka / CC BY 3.0, via Wikimedia Commons

Probable cause

Improper overhaul of the trunnion cross-pin hole that resulted in the development of stress corrosion cracking and eventual failure of the right forward trunnion.

— NTSB Determination

Contributing factors

Incorrect service/maintenanceFatigue/wear/corrosionMain landing gear attach sec — FailureGear attach fittings (on fus) — Failure