TC feedback MCH stuck at B3 position when MS put to ATPM. TC switched to AM for train to depart. ~~~~~ 3614-Fault able to duplicate twice. Further check found FOD in between MS brush plate. Removed FOD & Inspected gear meshing & Bearing for abnormalities-Ok. Function check multiple times-Ok. No further abnormalities found. Checked 3613 preventively-Ok.   Hairul S / Faisal / Hussein / Fahmi Y. 29.05.2024.