TC reported MR pressure overcharging from 10 bar to 11 bar since TAP2. TC feedback train keep havingloud discharge sound. ERS-12 ~~~~~ 3635-TC reported MR pressure overcharging from 10 bar to 11 bar since TAP2.TC feedback train keep having  loud discharge sound. To check air compressor cut IN/OUT pressure.  3635 cut in: 8.9(duplex)/ 8.43(digital) Cut out: 10.8(duplex)/ 10.3(digital) MR relieve valve: purge:11.1 bar Check CG contact NC close: 0.3, open OL, LMRG contact. NO open: 0L, Close: 0.2 NC: open:OL, close: 0.3 3636 cut in: 8.6(duplex)/ 8.36(digital) Cut out: 10.4(duplex)/ 10.3(digital) MR relieve valve: purge:11.1 bar Check CG contact NC close: 0.3, open OL, LMRG contact. NO open: 0L, Close: 0.2 NC: open:OL, close: 0.3 Check both car undercarriage air dryer change over ok. Check air compressor no abnormalities. No air leak sound Air leak test 0.3bar/5min  Duplex gauge and digital 0.5 difference Ops 20 further check" Saini/haslan/Asruddin 44763 3635 To c/o AIR DRYER #3635 Air dryer c/o done.During the test at 6 bar air dryer purge water and compressor safety v/v blow.Swap compressor safety v/v to #3636 safety v/v not blowing. 0030 to c/o Air Dryer on #3635 again. Air dryer- Old: 351502053 New: 3515240288 Not: 2402134 raise to RSW. Done by Ngieng/Haikel/Morgan. 24/07/22 3635 To further check Check and found #3635 Air dryer constantly air purging from exhaust port and air compressor relief v/v purging.Suspct Air Dryer checke to c/o.Function test ok and change over ok.Cut in-8.5bar,Cut out-10.2bar ,CT-2 min 15sec,Air leak test 0.4bar/5min. #3635 Air Dryer c/o: Old s/n: 3515240288 New s/n: 3515480326 Not: 2402204 raise Done by Sanip/Koh. 25/07/22