Case C-315/15: Judgment of the Court (Third Chamber) of 4 May 2017 (request for a preliminary ruling from the Obvodní soud pro Prahu — Czech Republic) — Marcela Pešková, Jiří Peška v Travel Service a.s. (Reference for a preliminary ruling — Air transport — Regulation (EC) No 261/2004 — Article 5(3) — Compensation to passengers in the event of denied boarding and of cancellation or long delay of flights — Scope — Exemption from the obligation to pay compensation — Collision between an aircraft and a bird — Notion of ‘extraordinary circumstances’ — Notion of ‘reasonable measures’ to avoid extraordinary circumstances or the consequences thereof)