PNEUMATICS
AIR CONDITIONING
AND PRESSURIZATION
AIRPLANE
OPERATIONS
MANUAL
2-14-10
Page
14
Code
01
REVISION 38
AOM-145/1114
5 - GASPER BUTTON
− Turns on (pressed) or turns off (released) the gasper fan inflight
only.
− A striped bar illuminates inside the button to indicate that it is
released.
− On ground, the gasper fan is turned on as soon as the
associated DC Bus is energized.
6 - CROSS-BLEED KNOB
− CLOSED - Closes the Cross-bleed Valve.
− AUTO - Selects automatic operation mode of the Cross-bleed
Valve.
− OPEN - Opens the Cross-bleed Valve.
7 - BLEED AIR BUTTON
− Opens (pressed) or closes (released) the associated Engine
Bleed Valve.
− A striped bar illuminates inside the button to indicate that it is
released.
− A LEAK inscription illuminates inside the button to indicate a
duct leakage in the associated bleed line.
NOTE: The LEAK inscription is not available on some airplanes.
8 - APU BLEED BUTTON
− Opens (pressed) or closes (released) the APU Bleed Valve.
− A striped bar illuminates inside the button to indicate that it is
pressed.
− An OPEN inscription illuminates inside the button to indicate
that the APU Bleed Valve is in the open position.
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