TC report RM1 intermittent brake fault indication lit up. Performance so far ok. ~~~~~ 3553 TC report RM1 intermittent brake fault indication lit up. Performance so far ok.  553/554 ER D/L & found BCP on 1554 showing abnormalities (BCP    slow to release). OPS 20 raised to follow-up.  Jefferson 43887 To replace 1554 ACU with spare.  1554 ACU replaced - Done. Swopped 3553 BCU to 3554. Brake pressure test - OK. Limited movement - OK. 1554 ACU S/N : OLD : 1311/148 NEW : 1244/107 BCU S/N : 3553 : 1514124 3554 : 1827112  Selvan/Lee PT/Anand 43887