GE CF6's engine crank selection
With no bleed air supplied to the manifolds, with crank selected can someone explain what is controlled closed? (valves)
what affect, if any, does this have on the cooling of the avionics ventilation?
what i'm trying to work out is will selecting crank damage anything if selected for long periods of time with no bleed air supplied, will the ventilation (blowers/fans) continue to do their jobs ventilating the avionics.
thanks.