603/604 pneumatic health check ~~~~~ 603/604 pneumatic health check 3604-5/2 Auto coupler air leak sound.  3604 5/2 valve auto coupler c/o and test ok. Air leak test 0.5b/5min. CT found Emu604 4min50sec and Emu603 6min fail. Proceed to c/o Emu604 air comp ok. Ops20 to follow up Emu603 air comp c/o and CT check. Side finding #2603 bogie #1 A1 and B2 parking brake air leak from breather.Notification to HM follow c/o. #2603 A1 parking brake c/o Noti:2592320 B2 parking brake c/o Noti:2592321 #3604 Air comp c/o Old:5014101027 new:120F-3845 Noti:2592322 Done By:Jack/Koh/Rizman/Faddzal Date:24/04/2024 3603 Air comp c/o and CT test both DT  Replaced #3603 air compressor C/O done. Security check and tested - one.  cars air leak test: 0.5b / 5mins. Duplex Gauge / Digital #3603 Cut in: 8.65b/8.52b Cut out: 10.28b/10.25b Charging Time: 3m50s #3604 Cut in: 8.65b/8.6b Cut out: 10.38b/10.34b Charging Time: 3m43s Air comp (#3603) New: 5014441033 Old: 5014110029 Noti: 2592335