 BACE Hayes is currently in the process of being closed, with particular of the facility moving into TBC.British Airways Maintenance Glasgow (BAMG) is where all Airbus A319/A320/A321 CEO & NEO heavy maintenance is done.In 2012 all 737-400 series "heavy" maintenance was outsourced to contractors based in Sofia, Bulgaria and from 2014 KLM engineering in Norwich owing to the age of the aircraft.