ICE AND RAIN PROTECTION
Description
Aircraft Operations Manual
11.1
PAGE
16
Jun 01/17
Axxx
A34462
A
Timer light (amber).
Will come on if:
−
no pressure is sensed downstream the valve
sequenced for opening within 4 seconds.
−
the activated timer gives no inflation signal.
−
the boots are not cycling.
−
pressure remains on in the stabilizer boot zones
(AUTO CYCLING switch in CONT).
−
pressure remains on in the stabilizer boot zones
when next cycle is activated. (AUTO CYCLING
switch in ONE CYCLE.)
−
pressure remains on in Left and Right inboard
wing or Left and Right outboard wing boot zone af-
ter more than 8 seconds.
On a/c s/n 160
−
239:
The following additional faults triggers the TIMER
light:
−
Control power to timer is lost. (If the W OUTB push
button is depressed the TIMER light will go out,
when the button is released the light will come on
again.)
On a/c s/n 240
−
up:
The following additional faults triggers the TIMER
light.
−
pressure remains on in any boot zone (AUTO
CYCLING switch in ONE CYCLE or CONT).
−
control power to timer is lost
−
depressing any of the Manual push buttons while
in CONT or during a one CYCLE sequence will
result in the TIMER light coming on momentarily.
AUTO CYCLING
Activates timer to give a four
−
times six second
cycle of boot inflation in the following order:
Stabilizer
Outboard wing
Inboard wing
Stabilizer
ONE CYCLE (Spring loaded to OFF position):
One complete cycle.
CONT:
One complete cycle every third
minute.
Boot indication lights (green).
Will come on whenever the respective boot
system is pressurized and BOOT IND
switch is ON.
Manual de
−
ice buttons.
Overrides timer function and keeps respec-
tive de
−
ice valve open as long as button is
depressed.
DE
−
ICE OV TEMP light (amber).
Will come on together with associated mas-
ter caution whenever either of the two over-
heat sensors detects an overtemperature.
AIR SUPPLY switch.
ON
shutoff valves open.
OFF
shutoff valves closed.
BOOT IND switch.
When in OFF the boot indication light
system is deactivated.
A
STABILIZER AND WING DE
−
ICE PANEL
Fig. 6 Stabilizer and wing de
−
ice system
−
controls and indicators