503/504 found air leak test failed durin ~~~~~ 503/504 found air leak test failed durin     #3504 A/S WFL magnet v/v replaced due to air leaking.#3504-B/S WFL elbow joint replaced due to air leak.Found #2504-B3 saloon door T-joint coupling near manifold to have air leaking.Tightened loose coupling no further leaks observed.Carried out air leak test ,0.6bar/5min. Done by Sanip/Joshua.  30/11/20