509/510 DT check found air leak fail. ~~~~~ Train leak rate 1.2bar/5min.With M2-M2 MRIC isolated.EMU 509    leak 0.6bar/5min,EMU510 leak 1.2bar in 2min30sec. Check and found EMU 510 having multiple test point and #3510 R side WFL air leak badly.All air leak eliminated and conduct air leak test 0.5bar in 5min. Done by Joshua/Deeshan/Sanip/Faddzal. 22/12/20