To answer a couple guys above and to clarify, as someone pointed out an FCIR is required for any refusal extension. But not the fatigue report and associated review, unless it’s fatigue related. In my situation, despite being extended, I was not fatigued. If I were, I would have called out fatigued. I even had financial incentive to do so, and the irop and rolling delays and pairing mods would have likely been adequate justification. But I couldn’t in good faith claim fatigue at that point in the evening when I actually felt ok. If I had to do an FCIR for an extension refusal, I would have cited safety as the reason, due to conditions (snow/ice), multiple schedule changes, multiple maintenance issues, the potential for even more enroute delays beyond my extension time window (real possibility as I was close) despite being off by the MOT, the potential for fatigue if I continued in those circumstances, especially if we got delayed further once under way. But at that moment in time I couldn’t honestly say I was fatigued.