Originally Posted by
newKnow
FTB,
All I can say is that ALL DC-9 are hot when the surface temperatures are in the upper 80's and above. Like 88 said, you have to stay in front of them and cool the cabin on approach and you MUST get ground air to go along with the APU. Even then, with APU and ground air, normally that just keeps the cabin down to the luke-warm status. On normal hot summer days, as a DC-9 driver, you are only cool when 1.) you are in the terminal or, 2.) above FL 180.
The fixes I have seen on the -9 are the shields for the cockpit windows and the window shades being pulled down and gaspers opened int he main cabin. Other than those, I don't know what we can do.
The few -88's I have been on this summer had no heat/cooling issues that I noticed. But, maybe that was because I had just gotten off a DC-9.
I wonder how the MD-90's are with cooling.....
I've had a few 88s that had weak APU bleed air and you could tell it during engine start. Figured thats why there running so hot on start. I've had engines run up to about 10 degrees short of max temp on start and then ones with great APUs keep even hot engines 100 degrees below max temp.
The good news, I've had more Captains than not start a trip telling me "I don't care about the APU, if you need it, start it. And start it when we clear of the runway. Keep these people cold."