Originally Posted by
lomapaseo
I would expect that an airline the size of AA would have to be able to anticipate this weeks in advance in order to adjust schedules so only fresh engines out of the shop flew into and out of PHX that day.
Let's break it down.
Airlines are required to do performance calculations before each takeoff. One of the items used in the calculations is air temperature. If the current temperature is beyond the range of temperatures in the performance database you can't get the required performance data and therefore can not takeoff.