549/550 air leak fail during dt (1.1 bar ~~~~~ 549/550 air leak fail during dt (1.1 bar / 5 min)  At car #3549, replaced coupler magnet valve and flange lubrication magnet valve due to air leak. At car #1150, replaced PB pressure switch due to air leak. At cars #2550 and #1549, found PBSV slight air leak, tightened and re-secured. Checked no more air leak. Chekced both DT car air compressor cut in / cut out and charging time statis. Air leak rate: 0.5b/5min.    CMV Old SN: 3518100554 New SN: 1123120431 Notif: 2558825 FLMV Old SN: - New SN: 1123150458 Notif: 2558826 Done by: Saini/Haslan/Din 45299