Fatigue calls?
 

I know it's a personal judgment call, but when do you start questioning fit for duty in your duty day. 10, 11, 12, 13 hrs?

Is it fatiguing in it of itself being on resv and getting rerouted numerous times per day and trip. Does it tire you out thinking you will be done after one leg, a dh and then one leg to an overnight to find out after your first leg you will sit for 3plus hrs and do three legs to your overnight.

Before you jump all over me about you're lucky to have a job, quit your whining. I would just like you're opinion on what I asked.

I don't understand. If you're fatigued, call fatigued. You want us to tell you when you're tired?

I start to worry about fatigue after 6-8 hours of sleep debt.

I usually start to worry about fatigue after 6-8 hours of sleep debt.

Has little to do with duty hours on any given day. I worry about fatigue when I look at a trip and see where delays and other factors might affect my cognitive performance. Fatigue is insidious and is not easily recognizable in the early stages, which is where you might start making mistakes.
I believe all pilots push it, and it almost always works out for us because we often work in a safe environment. But if I know I'm tired, and I'm flying to someplace with an increased risk (weather, terrain, approaches) that's when I seriously consider calling in.

That's just tired. Fatigue is over a course of time.But be assured that the NTSB will only consider the previous 72 hours,

No that's acute fatigue

When I feel tired. Might be due to bad sleep, or a long day full of hassles.

There's acute and chronic fatigue. I feel tired when suffering from either. But not everyone will always feel tired when suffering from chronic fatigue, or if they do they may just get used to it and don't notice.

Different people react differently.

Fatigue isn't something I predict based on my schedule. It's something that happens over time, I've called in a few times with it. How do I know it's time?

Am I laughing at things that aren't funny? Unable to think through problems? Getting easily ****ed off? Do I feel that I couldn't pass a checkride in that condition? For me those are all signs. If all hell broke loose and I don't know for sure that I'd be reacting properly, then it's time to call.

Ask yourself if you'd want your kid/loved one in the back of a plane flown by someone in your condition. If there are any reservations then you have no business flying.

When faced with the Fit for Duty question - if you have to give it serious thought then you are probably nearing fatigue.