Incubator temp drop!!!

my incubator got unplugged and tem dropped to 74 for approx 8 hours
it has been corrected but i am freaking out about develpment
they should be piping any day any help would be great

If they're ready to pip then they've already passed most of the critical developmental processes, you're not going to get a three-headed snake at this point. Might slow 'em down a little, but a short temp. drop this far along shouldn't cause too many problems. In "the wild" they've adapted to put up with temperature swings and drifts. I'm sure one of the breeders here will give you more advice.