Multiple air leak; #3533 coupler magnet ~~~~~ Found air leak at #1533 bogie 2 levelling valve. Replaced the levelling valve. Found air leak at #2533 bogie 2 levelling valve. Replaced the levelling valve. Function checked ok. Air spring height check ok, within criteria. Found air leak at #3533 coupler magnet valve pipe. Tightened ok. Air leak test 0.6b/5min. Ops20 to continue 1533 bogie 2 levelling valve Old SN: 1844532 New SN: 095302 Notif: 2599136 2533 bogie 2 levelling valve Old SN: 1339417 New SN: 1234614 Notif: 2599140 Done by: Pravin/Sudin/Gopal/Fazil 16.5.24 To follow up other air leak check  Found #3534 A/S WFL magnet valve air leak. Replaced ok. Found 1534 MPV air leak. Replaced o ring ok. Air leak test 0.5b/5min    Done by: kamal/Ngieng/Koh 17.5.24