Joined Cases C-156/22 to C-158/22, TAP Portugal (Death of the co-pilot) and Others: Judgment of the Court (Third Chamber) of 11 May 2023 (requests for a preliminary ruling from the Landgericht Stuttgart — Germany) — TAP Portugal v flightright GmbH (C-156/22), Myflyright GmbH (C-157/22 and C-158/22) (References for a preliminary ruling — Air transport — Regulation (EC) No 261/2004 — Compensation to air passengers in the event of cancellation of flights — Article 5(3) — Exemption from the obligation to pay compensation — Concept of ‘extraordinary circumstances’ — Unexpected absence, due to illness or death, of a crew member whose presence is essential to the operation of the flight)