I have seen this train many times on pit lines of Guntur as Guntur narsapur passenger. May be PM at gnt while going as 57381 gnt n's fast passenger.it will return as 57382 n's gnt.fromngnt it will run as 57328 gnt-dhne passenger.and will return to gnt as 57327 dhne gnt.on return to gnt it will go as 57306 Gnt-kachiguda passenger.then it will finally return back as 57305 kcg-gnt passenger and goes to maintenance in Guntur.i think this is correct