Judgment of the Court (Eighth Chamber) of 7 July 2022.#KU and Others v SATA International – Azores Airlines SA.#Request for a preliminary ruling from the Tribunal Judicial da Comarca dos Açores.#Reference for a preliminary ruling – Air transport – Regulation (EC) No 261/2004 – Compensation and assistance to passengers – Cancellation or long delay of flights – Article 5(3) – Exemption from the obligation to pay compensation – Extraordinary circumstances – Generalised failure of the aircraft refuelling system at the airport.#Case C-308/21.