United Airlines flight UA-779 had to return and make an emergency landing in San Francisco, California, on December 18th.
The Boeing 757-200 plane took off for Newark, New Jersey, but had to turn back due to indication of smoke in a lavatory.
The plane landed uneventfully. All one hundred and seventy-six people aboard remained safe.

Aeromexico flight AM-11 had to return for an emergency landing in Santiago, Chile, on April 5th.
Egypt Air flight MS-855 had to return for an emergency landing in Cairo, Egypt, on November 7th.
Mango Airlines flight JE-147 had to return and make an emergency landing in Johannesburg, South Africa, on November 19th.
