Reading over the rules in preparation for a game this Friday. There are a few different rules that say to "Ignore any 'F' Result from..." such as Defensive Bombardment (10.2.3) or Maneuver Combat Support (10.3.6). My initial gut interpretation of this is to keep the number results (to use for step loss after TDV division is applied) and ignore the "F". But as I've thought about it more, it may potentially be just as valid to interpret that as ignoring the entire result. So instead of a "6F" Defensive Bombardment being simply "6", it could potentially mean that any result with an "F" in it is ignored entirely.
Which is the correct interpretation? I assume the first one, just want to be sure.
Your assumption is correct. You ignore the "F" portion of the result; the number portion stands. As an example, D6F4: ignore the F4 and apply the D6.