eeek i have a similar questions im hatching 12 eggs for someone else on there incubator and last night for some reason the temp went down to 91 degrees it was only at that for about 15-30 minutes before i was able to catch it and turn it up will the eggs be ok? they are 8 days along!
I would say that yours are definitely fine. It would take longer than that for the internal temp of the egg to really drop significantly.
113 (actually 45 centigrade) is the temp I was told to run for x hours (I think x=15) to kill off any bacteria. It was quoted to reduce hatch rate by 10%.
Best wishes on your chickies!