DT,#525/526 air test failed,5 min. 1.2 b ~~~~~ DT,#525/526 air test failed,5 min. 1.2 bar.  Check and found 2526 MPV air leak 2525 MPV air leak. ACU airleak at EMU 1526. Replace 2 unit of MPV and one unit of ACU and perform air test pass. (5 min 0.3bar). EMU 1526 ACU Old: 1244107 New: 1038065 Notif: 2563764 EMU 2525 MPV Old: 1034305 New: 1029297 Notif: 2563766 EMU 2526 MPV Old: 1039333 New: 1038328 Notif: 2563767 Done by: Yusof, Haslan, Fauzi & Ngieng. 22/01/2024.