The pneumatic system supplies bleed air for the following
THE AAA Thurst reversers Hydraulic reservoirs Engine starting Air conditioning Anti-ice ADP
What do isolation valves do
Transfer bleed air from one side of the system to the other
Why should the C ISLN VALVE remain open
To protect air source for the ADP
The BLEED light illuminated on the Pneumatic panel means
The HP Valve is open when it should be closed