Thanks pmarc for the reply. My apologies you are correct this is not a composite FCF, i incorrectly stated that in the post title.
I have attached another sketch to better explain the datum structure. Datum -A- is a face which controls the perpendicularity of these holes. Datum -B- is a Ø...
Please see the attached example. Throughout many years of manufacturing round tight tolerance aerospace engine components I have never seen the call out in question. Please review and let me know your thoughts, internally we are debating the interpretation. My thoughts may be tainted due to...