Originally Posted by
LAXtoDEN
You ready? The hottest day in Phoenix was June 26th, 1990. It was recorded at 122 degrees Fahrenheit.
APU max operation Temp: 52 degrees Celsius/125.6 degrees Fahrenheit.
175 has a few max temps, but mostly cold temperature limitations. None that would create an issue from an operational standpoint in Phoenix.
Unless you’re referring to some potential performance issues in hot weather? Single engine climb gradient issues? It does have a tendency to climb like a dog in the summer.
It's the ISA+35 max t/o temp.because of the elevation there, isa is lower. 120 is not an issue at sea level, but at over 1000 ft it can be.
you ready? *eye roll*
ISA is 13 degrees at 1000'MSL based on the ambient temperature lapse rate of 2 degrees/1000 ft. Add + 35 = 48 C which is 118.4 F. Ops prohibited that day, and several others.