Hi

To disable this Flight plan.Do that
1 Browse cs727base.PLN in Flight Simulator X files folder
Rename the Flight plan cs727base.PLN to cs727base.INACTIVE or BACKUP for example (you converse the file in case that I need to come back)
2 Do a copy of 727-100 Cold-n-Dark (KSEA).FTL
Rename the copy 727-100 Cold-n-Dark (KSEA) copy.FTL to 727-100 Cold-n-Dark (KSEA).BACKUP
3 Open FSX and load the 727-100 Cold-n-dark (KSEA) flight, an error message appear, accept.
4 Check you don`t have flight plan loaded on GPS
Save and Overwrite the flight 727-100 Cold-n-Dark (KSEA)