Zone,
Same with our ops. Cosmo means well, but really doesn't know what he's talking about.
Leave the APU on for takeoff as SOP? Unless needed for MEL or performance issues, leave it off.
Want to leave it on Cosmo? Fine. In the future we could have a 45 page thread regarding an accident where the crew aborted and burned after getting a APU fault light before V1. Pick your favorite "can of worms" off the shelf for opening at anytime Cosmo
