That probably won't work. Most servos only rotate about 90 degrees, and a typical flaps indicator needs in excess of 180 degrees. You could gear up a traditional servo, but why bother when you can get a 360 degree servo like this one.
Thanks mate, yes, it seems it only rotate 60 degrees.
About the one you suggested, not sure if I can get it here, the electronics offer is very limited.
If the servo only needs to turn something light like a simple dial pointer, then the servo output can be simply geared up using stuff from the kitchen junk drawer. Something as simple as two plastic bottle caps of different sizes connected with string can make an up gearing pully setup.