"the existing Coimbatore – Mettupalayam Passenger (special) 56146/47 and 56148/49 and 56150/51 (six days a week) has been regularised and made a permanent train service with effect from July 1(2011)."
Source :
click hereAdmins kindly update the Inaugral Run field for 56146/47/48/49/50/51 ...