No fatalities

BOEING 747-4HQF accident at Istanbul, OF, Turkey, 17 Aug 2024

Istanbul, OF, Turkey

On August 17, 2024, a BOEING 747-4HQF operated by KALITTA AIR LLC was involved in an aviation accident near Istanbul, OF, Turkey. No fatalities were reported. Investigators recorded the probable cause as: The fatigue failure of multiple hinge ribs associated with the right outboard aileron, which resulted in abnormal aileron movement and airframe vibration. This summary draws on records from NTSB; 3 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-08-03Data APIEditorial standards
BOEING 747-4HQF
Photo: Tosaka / CC BY 3.0, via Wikimedia Commons

Probable cause

The fatigue failure of multiple hinge ribs associated with the right outboard aileron, which resulted in abnormal aileron movement and airframe vibration. Contributing to the failure was the mis-rigged condition of the right outboard aileron, which increased operational loads on the hinge fittings during cruise flight.

— NTSB Determination

Contributing factors

Fatigue/wear/corrosionMaintenance personnel