Case C-832/18: Judgment of the Court (Eighth Chamber) of 12 March 2020 (request for a preliminary ruling from the Helsingin hovioikeus — Finland) — A and Others v Finnair Oyj (Reference for a preliminary ruling — Air transport — Regulation (EC) No 261/2004 — Articles 5 and 7 — Right to compensation in the event of delay or cancellation of a flight — Entitlement to compensation more than once in the event of a delay or cancellation not only of the original reservation, but also of the subsequent reservation made in the context of a re-routing — Scope — Exemption from the obligation to pay compensation — Concept of ‘extraordinary circumstances’ — ‘On condition’ part — Technical shortcomings inherent in aircraft maintenance)