1501 DT reported near #1 bogie A/S air l ~~~~~ 1501 DT reported near #1 bogie U/F A/S air leaking. To follow up.     Check and found bogie 1 AS leveling v/v heavy air leak from exhaust port.Replace and function test ok.Measure air spring ht 279mm(A/S),280mm (B/S)>2 shim-pass.Air leak test 5min/0.5bar. Leveling v/v- Old s/n: 1034-242  New s/n: 1233-334 Not: 2214133 raise. Done by Sanip/Firdaus. 29/10/20