How long has he been like that? Because when a chick pips, he spends some time just lying there, breathing room air and resting. He has to have time to absorb his yolk sac and to shut down his attachments to the blood vessels running on the inside of the shell. I have had chicks under a hen pip and then lie there for twelve hours doing nothing at all that I could see. I left them be, and they hatched.
It's really hard to know when to interfere. I know some Forum members have a "time limit" on how long they'll leave a pipped egg, but I don't have much experience with incubators. The last time I hatched eggs with an incubator, I think the maximum "doing nothing" period that an egg showed was fourteen hours or so, so if an egg was getting past eighteen hours, I'd be really nervous. I know that if we interfere too soon, though, the chick will die.
I would think that the most important things to do are to make sure that temperature and humidity stay where they need to be, and really keep an eye on things. If the exposed membranes start looking really dry, that could just be the outer membrane, or it could be a sign that the chick is going sticky on you. If the chick is crying and seems like it can't move, then that might be the sign that it needs help, but it's so hard to tell when you only have a tiny window to work with.
I wish I could be more helpful.
