Given packs are off for engine start I'm still not sure what the aircraft's movement has to do with it...what would you suggest at airports where the tug does a push and then a pull, and engines are started when you are moving forward or have already moved forward to a release point?
Are you simply saying leave the packs off for a specified time after engines are running, presumably in the hope of burning off any oil, residue or similar that gets into the engine bleed system during engine start?
Last edited by wiggy; 20th Sep 2017 at 06:12.