FILE PHOTO: The logo of Airbus is pictured at the aircraft builder's headquarters of Airbus in Colomiers near Toulouse, France, November 15, 2019. REUTERS/Regis Duvignau

PARIS: Ratings agency Standard & Poors placed Airbus on its watch list for a possible downgrade as doubts surfaced over the future level of aircraft deliveries and advance payments from airlines battered by the coronavirus crisis.