Is your feature request related to a problem? Please describe.
Cockpit feels very sterile during preflight.
Describe the solution you'd like
When the APU AIR is turned ON, there is a fairly significant 'woosh' of airflow as it immediately pumps air into the cabin. This remains throughout the ground ops.
Describe alternatives you've considered
Nothing huge, just adding noise.
Additional context
There is also adjustment of airflow as various fans turn on/off during the AIR SYS TEST that is prevalent before turning on APU AIR. If APU AIR is ON during the AIR SYS TEST, these noise fluctuations are even more noticable. The same is true when the AIR SYS configures for engine start.
Is your feature request related to a problem? Please describe.
Cockpit feels very sterile during preflight.
Describe the solution you'd like
When the APU AIR is turned ON, there is a fairly significant 'woosh' of airflow as it immediately pumps air into the cabin. This remains throughout the ground ops.
Describe alternatives you've considered
Nothing huge, just adding noise.
Additional context
There is also adjustment of airflow as various fans turn on/off during the AIR SYS TEST that is prevalent before turning on APU AIR. If APU AIR is ON during the AIR SYS TEST, these noise fluctuations are even more noticable. The same is true when the AIR SYS configures for engine start.