Croatia Airlines flight OU-410 had to return for an emergency landing in Zagreb, Croatia, on September 4th.
The Airbus A320-200 plane took off for Frankfurt, Germany, but had to return shortly afterwards due to a fault in left hand engine.
The plane landed uneventfully. All passengers and crew members remained safe.

Emirates Airlines flight EK-148 made an emergency landing in Dubai, United Arab Emirates, on August 12th.
United Airlines flight UA-135 had to return and make an emergency landing in Zurich, Switzerland, on May 20th.
IndiGo Airlines flight 6E-248 had to reject take off from Mumbai, India, on January 21st.
JetBlue flight B6-23 had to divert and make an emergency landing in Nashville, Tennessee, on July 29th.