Ask your source for a citation. Absent insider abuse, which you did not allege, there is no different SAR filing threshold for directors. If there was loan fraud or something else, you would file for that reason, not because he or she was a director.
There should be other ramifications...they may outweigh the impact of a simple SAR filing.
In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.