1511 & 1512 during DT check found air le ~~~~~ 1511 & 1512 during DT check found air leak from brake frame.  1511 ACU replaced - Done. Function test & found there is still leaking near the plastic joint area. Duty AE informed. OPS 20 raised to follow-up. 1511 ACU S/N : OLD : 1310/145 NEW : 1240/099  Suhairi/Irwan/Afiq 44088 To follow up rectify.  1511 found MRPB behind brake frame safety v/v leaking (Norgren T65CZ800 Max.10 bar). To replace when spare available. OPS 30 raised to follow-up.  Chan SW/Hanafi 44089 To follow up rectification.  1511 replaced check v/v for parking brake & brake frame. Function test & brake pressure test - OK.  Selvan/Lee PT 44089