Mr. Peter O'Neill:

I mention the apron areas around the runway. I go back to the weather conditions there, where there was a lot of precipitation, and it froze over. Freezing conditions stayed through the day as well so they were quite unique conditions on the day into Friday. Temperatures did not lift at all so there was no natural de-icing taking place, which was unusual. That compounded the situation. We would de-ice an aircraft and be ready to go but when the pushback truck would go to move that aircraft there might be ice in the area. Again, safety comes first, and we will put a hold on that aircraft moving until the conditions are right to push back. What we saw through the day was a cumulative effect where the de-icing would take place, then the conditions did not allow the aircraft to go, and we saw later in the day that air traffic control put a holding delay on flights into Dublin because the airport ran out of concrete to park aircraft and aircraft had to wait-----