The aeronautical pneumatic circuit is the circuit powering the Gyroscopes. We find two types of pneumatic circuits:
The input is air and the output is an indication on the Vacuum Indicator.
When a Vacuum Pump isn't working or a Venturi is iced, the circuit can't power the Gyroscopes. In this case, a continuation of the flight is possible only in VFR.
Status:: #wiki/notes/germinating
Plantations:: Aerotechnics - 20230216083955
References:: Le Manuel de Pilotage d'Avion