Originally Posted by
Dash8widget
Good points - on the 88, I think most people use the APU electrics if its running but I don't remember any specific guidance. On the 90 the power switching is automatic - if the APU is up with the gen on then that's what the airplane is using.
Dash,
On the 727, we were having a rash of dual pack overheats for the reason I mentioned, so I got a restriction or warning (can't remember which) placed in our manuals. It was a really big deal for awhile because the PanAm SO's were basically doing everything their old way. We were actually told at an LCA meeting that if we were giving a line check to a PanAm SO and he wasn't doing it Delta's way, he would be terminated. They got real serious about that stuff.
Now that you pointed it out, I vaguely remember the 90 prevented that scenario. Don't tell anybody, but I kind of miss the 90. I don't miss the 88 though. Ha