Originally Posted by
CaptCoolHand
Just pull up the Fatigue FCIR and read through it. Read the FRPM.
Don't fly fatigued. It's not safe, and it's illegal. If you have an incident, they'll ask you about your previous rest. If you extended why you extended and how come you didn't know you were fatigued at the end of your flight even though you felt fine to start. Fatigue is difficult to assess especially when fatigued. It's all spelled out in the Fatigue Manual.
Even if it is your fault and you are fatigued the responsible thing to do is to call out ASAP to give the operation as much time to recover as possible
And there in lies the absolute absurdity of part 117 extensions. We’re taught that fatigue sneaks up on you and that when you are fatigued your decision making ability is impaired. Then they ask you to make a decision about your fatigue at a point at which if you were fatigued you’d be unfit to make sound decisions. Makes perfect sense!