12051 12052 Total 3 rakes are shared between 12051/12052 & 12071/12072. The RSA pattern works like this on monday the rake departs as 12051 from dadar and returns the same day at dadar as 12052 then on next day (tuesday) it departs as 12071 and returns on next day (wednesday) as 12072, the rake of 12072 is shunted out from the platform and another rake is brought for 12071, then the rake of 12072 departs as 12051 on next day (thursday). [This RSA pattern is followed only during non-monsoon timetable.
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