Hi all.
I agree minimum time between starts extends APU's life a liiiiitle bit, but I wouldn't sacrifice good operating practices in the name of (another) exasperated money saving attempt.
Some considerations: with a weak APU (I do operate Classics, not NG), how are you going to check 30 psi minimum if you are using a pack for airconditioning and very quickly turn it off and open the start valve?
In case of abnormal start of the first engine, if you need to open again to motor the engine you will have to remember cutting the second engine also...
Too many
ifs, maybe, but ask yourself: would you use minimum time procedures while being checked in a sim?
There are so many factors which could save some money at the end of the year, but is it a reason for regularly flying with no extra fuel, or always flying fast approaches on idle till the minima, or requesting taxi while still starting the engines etc. etc.?
Also, what I don't like is people modifying procedures on their own...
If that's standard-official, why don't they write it in the sop and checklist?
.........By the way “AIR CONDITIONING PACKS……………………..OFF
Has been removed from the future before start checklist draft. It will be part of the start procedure so you can do this “by the book” in the future LEM...............
Hi 80/20, how d'you know? You mean they'll change the CLASSIC cklists?
I don't think so.
My morale: this is a dumb procedure, as people tend to do it faster and faster, like opening the second starter as soon as the first one pops, without even checking for the Start valve open light to extinguish.
They like to play with "No starter cutout" in the sim, then encourage dumb procedures at the speed of light...
LEM