Let me tell you a story. At my company about a year ago, we had a pilot who showed up at the airport that smelled like alcohol. A TSA agent discovered this and reported him. The airport police made him take a breathalizer test and while I don't remember what the exact result was, I do know that he was below FAA limits but was above our company's more restrictive limit. An investigation proved he had not had a drink within the FAA and company 8 hr rule. So his only violation was breaking the company policy of blowing too high a breathalizer score.
So what happened. He was fired by the company but a statement by our FSDO (the statement was published in the newspaper; I read it) was that he didn't break any FARS; he broke a company rule and it was a company matter so the FAA wasn't going to pursue it.
So tell me; You have a Fed in the jumpseat and your company SOP (FAA approved, right) says you're suppose to climb out at a certain speed but you climb at a different speed and violate company policy. There's no way unless you break a FAA speed restriction (ie: more then 250 below 10, ATC instructions or crossings), that a fed could violate you for that. A check airmen could whack you on that, on a linecheck or a checkride but there's no FAA violation here even though the FAA signed off on the SOP.
But then there's that "careless and reckless operation" thing they could get you on in certain circumstances I guess. But I think you all get the point.