Aerotrans Cargo flight ATG-4428 had to return and make an emergency landing at Frankfurt-Hahn Airport, Germany, on February 15th.
The Boeing 747-400 plane took off for Baku, Azerbaijan, but had to turn back after an unidentified loud bang was heard on-board.
The plane landed back safely. Everyone aboard remained unharmed.
Germanwings flight 4U-7218 had to return and make an emergency landing in Hamburg, Germany, on January 29th.
China Southern Airlines flight CZ-3688 had to divert and make an emergency landing at Hohhot Baita International Airport, Inner Mongolia, China, on July 4th.