If they downgrade you from F to C due to equipment change, is there any compensation? I am on an award ticket.
You are referring to a post when the old 74M was still existed, that plane has since gone to convert to freighter, so your chances are slim to none.
However, if there is for some reason your 747 got swapped to a 2 class 777, no you are not gonna get any compensation on an award ticket, as it is only one segment of your entire trip in C, your other segments still in F. Award tickets no matter one segment in F or all segments in F still charge F miles.