TC reported intermittent brake fault atcar Rear M2. Fault self cleared. ~~~~~ TC reported intermittent brake fault at     #2516 When 750vdc cut off,B1 to coast,stuck brake.Heavy air leak from solenoid coarse exhaust.Replaced faulty ACU and carried out brakes cyclic/function test ok. ACU-Old s/n: 1008-006  New s/n: 1037-048 Not: 2153434 raise. Done by Joshua. 23/04/20