Pneumatic air is extracted from:
The LP and HP compressors
With loss of DC electrical power, the shut off and regulator valves:
Fail open
The L and R BLEED AIR ON-OFF switches are located:
On the copilot lower right switch panel
The temperature of the bleed air in the duct between the engine and the bleed air manifold is monitored by:
Duct temperature sensor
The BLEED AIR L annunciator illuminates:
When the temperature in the left pylon or the left bleed air duct is too high