38Secondly, it is apparent from the case-law of the Court relating to the concept of ‘extraordinary circumstances’ within the meaning of Article 5(3) of Regulation No 261/2004 that events whose origin is ‘internal’ must be distinguished from those whose origin is ‘external’ to the air carrier, and only the latter are capable of falling outside the actual control of that carrier. The concept of ‘events of external origin’ encompasses events which result from the activity of the air carrier and from external circumstances which are more or less frequent in practice but which the air carrier does not control because they arise from an act of a third party, such as another air carrier or a public or private operator interfering with flight or airport activity (judgment of 7 July 2022, SATA International – Azores Airlines (Failure of the refuelling system), C‑308/21, EU:C:2022:533, paragraph 25 and the case-law cited).