Originally Posted by
Adlerdriver
I don't think FARs address mixing civilian and military flying but I've never looked since it wasn't an issue for me. Regardless, I'm pretty sure that schedule Blackhawk described didn't comply with the spirit of any 121 rest requirements. I seriously doubt there was any FAR legal rest period free from duty between flights over the course of the two days of mixed mil/civ flying he described. One can argue legalities and definitions all day, but those don't change the fact that his schedule didn't allow opportunity for rest required by both civilian and military regulations.
FARs only address 121/135 duty, what you do on your own time (including mil) doesn't count... legally.
Of course common sense must apply, and if you ball one up they're going to look real hard at what you were up to in the days prior. Documented lack of sleep opportunity would get you violated.