Lufthansa flight LH-412 had to return and make an emergency landing in Munich, Germany, on December 3rd.
The plane took off for Newark, New Jersey, but had to return shortly afterwards due to reports of smell onboard.
The plane landed back safely after dumping excess fuel. Everyone aboard remained unharmed.

Flybondi flight FO-5450 made a hard landing on Cataratas del Iguazú International Airport, Argentina, on July 15th.
Eastar Jet flight ZE-623 made an emergency landing at New Chitose Airport, Japan, on September 1st.
EgyptAir flights 631, 650, 664, 834, 921, 959, 969 had to divert and make emergency landing at Sharm El-Sheikh and El-Ghardaga Airports, Sinai Peninsula, Egypt, on April 3rd.
Austrian Airlines flight OS-687 had to return and make an emergency landing in Vienna, Austria, on August 4th.