TC reported 3515 having BEU COM.Fault. ~~~~~ To follow up.  3515 encoder unit replaced & BEU COM. FAULT cleared.  Lee PT/Alan/Shafie 44396 #3515 Encoder S/N : OLD : 1040-032 NEW : 1939-162 3515 TC reported having BEU COM. Fault.  3515 found FC 201 (BEU COM FAULT) on TIMS. OPS 20 raised to replace Encoder unit.  Amair/Redzwan 44395 To replace 3515 Encoder with spare.  3515 Encoder Unit replaced but fault still persisted. Swapped #3515 encoder to #3516 & fault transferred to #3516. OPS 30 raised to follow-up.  Hanafi/Chan SW 44396