Mod : 4584
ATR 42 Model : 400/500
PNEUMATIC SYSTEM
AIR
P 3
NOV 99
100
1.03
.
20
20.2 CONTROLS
AIR BLEED PANEL
TOF
A–01–03–20–003–100AA
ENG BLEED pbs
Controls the associated HP valve and BLEED valve.
ON
(pb pressed in) associated HP and bleed valves solenoids are energized.
The valves will open if pressure is available.
OFF
(pb released) associated HP and bleed valves are closed. OFF light
illuminates white.
FAULT
The light illuminates amber and the CCAS is activated when the bleed
valve position disagrees with the selected position, this especially occurs
in case of leak or overheat.
OVHT light
The light illuminates amber and the CCAS is activated when either of the respective
bleed duct dual overheat sw operates (T
u
274
°
C/525
°
F).
LEAK light
The light comes on amber and the CCAS is activated when respective bleed leak
detection system signals an alert (T loop
u
153
°
C/307
°
F).
X VALVE OPEN light
The light illuminates amber when the GRD X FEED valve is open.
AA
1
2
3
4
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