All Aerotrain operations at the Kuala Lumpur International Airport (KLIA) Main Terminal have been suspended until further notice, says Malaysia Airports Holdings Berhad (MAHB).br br Its managing director Datuk Iskandar Mizal Mahmood said this was because existing trains were beyond serviceability given that the assets were 25 years old.br br Aerotrain operations were suspended since the breakdown on Wed (March 1).