KLM flight KL-723 returned and made a safe emergency landing at Amsterdam Airport Schiphol, Amsterdam, Netherlands, on June 6th.
The Airbus A330-300, en-route to Havana, Cuba, was mid-air when the crew reported an abnormal decrease in its oil quantity.
The plane diverted to Ireland but then continued for Amsterdam, and landed successfully.
All people onboard remained unharmed.
The passengers were accommodated in a replacement plane.

Etihad Airlines flight EY-207 returned and made an emergency landing at Jaipur International Airport, Rajasthan, India, on May 10th.
American Airlines flight AA-1743 encountered severe turbulence on the way to San Francisco, California, on February 14th.
Eastern Airways flight T3-1763 made an emergency landing in Toulouse, France, on April 13th.
Tigerair Australia flight TT-471 had to return and make an emergency landing in Melbourne, Australia, on July 19th.