TC reported MR pressure drop to 8.2 barwhen train was stationary at platform but MR pressure charge d up to 10 bar when train departed station. TC feedback ther e was no Compressor fault. TC feedback train encountered sim ~~~~~ 3667 CG replaced. 3667 cut in 8.65bar. Cut Out: 10.35bar. Opr 30 raised for 3668 CG C/O. Kana 44611 3668 CG replaced. 3668 cut in 8.63bar. Cut Out: 10.28bar. Air Leak test: 0.3/5min Redzwan/Raja 44613    3667 TC reported MR pressure drop to 8.2 bar when train was stationary at platform but MR pressure charged up to 10 bar when train departed station. TC feedback there was no Compressor fault  3667 cut in 8.51bar. Cut Out: 10.35bar.        3668 cut in 8.49bar. Cut Out: 10.32bar. Opr 20 raised Au TK 44611 3667 CG replaced. 3667 cut in 8.65bar. Cut Out: 10.35bar. Opr 30 raised for 3668 CG C/O. Kana 44611 3668 CG replaced. 3668 cut in 8.63bar. Cut Out: 10.28bar. Air Leak test: 0.3/5min Redzwan/Raja 44613