DO328 CREW HAD TRACK DEV IN ZDV CLASS E.

Narrative

WE HAD A MECHANICAL FAILURE OF OUR DE-ICE BOOTS ON THE DSCNT INTO DURANGO. SO; WE WERE UNABLE TO DEPART ALONG OUR NORMALLY FILED RTE WHICH WOULD TAKE US INTO ICING CONDITIONS. THE DISPATCHER AND I DECIDED TO RE-RTE THE FLT TO THE SW WHERE THE MEA'S WOULD KEEP OUR FLT OUT OF ICING CONDITIONS. THE DISPATCHER INSTRUCTED ME TO PICK UP THE CLRNC AS 'ZZXY' INSTEAD OF 'XY.' I PASSED THIS INFO ON TO MY FO; AS HE IS THE ONE WHO WOULD PICK UP THE CLRNC. WE BOARDED OUR FLT AND TAXIED OUT. I WAS ON THE #1 RADIO TALKING ON THE CTAF TO OUR INBOUND ACFT; GETTING A CURRENT WX RPT WHILE MY FO WAS ON THE #2 RADIO WITH CTR PICKING UP OUR CLRNC. HE INADVERTENTLY PICKED UP THE CLRNC AS 'XY' AND 'AS FILED.' WE ASSUMED THIS WAS OUR NEWER FLT PLAN. IT TURNS OUT THIS WAS NOT. I ASSUMED OUR 'OLD PLAN' HAD DROPPED OUT OF THE SYS BECAUSE IT WAS OVER 2 HRS OLD. WE DEPARTED TO THE SW AND UPON COMING INTO RADAR COVERAGE THE CTLR QUERIED US TO WHERE WE WERE PROCEEDING TO. WE WENT OVER OUR FLT PLAN WITH ATC AND FOUND IT WAS WRONG. HE RECLRED US AND TOLD US HE HAD AN ACFT LNDG AT FARMINGTON THAT COULD HAVE BEEN AN 'ISSUE.' HIS SUPVR CALLED OUR DISPATCH AND WAS CALLING THE CHIEF PLT THE NEXT DAY. THE CONTRIBUTING ISSUES WERE THE MECHANICAL; THE WX; NIGHT; NEW FO TO THE EQUIP; A NEWLY UPGRADED CAPT (HAD FLOWN THE EQUIP AS AN FO). WAYS TO PREVENT THIS: REQUIRING FULL RTE CLRNCS WHEN THINGS CHANGE; BOTH CREW MEMBERS LISTENING TO THE CLRNC; HAVING THE DISPATCH PULL THE OLD FLT PLAN WHEN FILING A NEW ONE.