Complex sentence: Pilots evaluated as best solution to land in Athens airport, something which they managed after 30 minutes of flight, where they landed on the runway 03R which is a special emergency runway at Eleftherios Venizelos airport, Athens.
Split into simpler sentences: Pilots evaluated as best solution to land in Athens airport, something which they managed after 30 minutes of flight. The aircraft landed landed on runway 03R which is a special emergency runway at Eleftherios Venizelos airport, Athens.