United Airlines flight UA-837 had to return and make an emergency landing in San Francisco, California, on November 28th.
According to the airline, the plane took off for Tokyo Narita Airport, Japan, but had to return shortly afterwards due to a mechanical issue with one of the engines.
The plane landed safely. There were 202 passengers and 15 crew members aboard at the time; all of them remained safe.

Scandinavian Airlines flight SK-9113 had to return and make an emergency landing at Shannon Airport, Ireland, on February 12th.
Fedex Federal Express flight FX-1590 made an emergency landing in Rochester, Minnesota, on January 10th.
Emirates flight EK-22 made an emergency landing in Dubai, United Arab Emirates, on June 25th.
Air France flight AF-1605 made an emergency landing at Milan–Malpensa Airport, Italy, on October 17th.