ICE AND RAIN PROTECTION
Operation
Aircraft Operations Manual
11.2
PAGE
5
CONDITIONS
NORMAL PROCEDURES
(Cont’d)
1.
AUTO CYCLING switch
CONT
. . . . . . . . . . . . . . . . . . . . . . . . .
Use CONT mode or operate the system as needed. If ice accumulation be-
tween the the automatic cycles is estimated to be more than 5 mm
(1/4 inch), set the AUTO CYCLING switch momentarily to OFF and then
back to CONT to activate an extra cycle, in between the automatic cycling,
to minimize ice accumulation.
2.
Observe boot indication lights to come on, one at a time.
The de
−
icing boots can be turned off when
−
The OAT or SAT is
warmer than +5
_
C
and there is no ice observed on any
part of the aircraft and it is certain that there is no ice accumulation on the air-
craft;
or;
−
No visible moisture
(such as fog with visibility of one mile or less, rain snow,
sleet, ice crystals) is present and three (3) de
−
icing boot cycles (9 minutes in
CONT mode) have been completed after exiting visible moisture.
−
If entering SAT below
−
40
_
C , turn boots off before completion of 3 cycles.
When wing and stabilizer de
−
icing no longer required
1.
AUTO CYCLING switch
OFF
. . . . . . . . . . . . . . . . . . . . . . . . .
Boots de
−
ice manual operation
−
Press and hold one manual push
−
button at a time for 6 sec. in the following se-
quence: STAB
−
W OUTB
−
W INB
−
STAB.
−
Observe respective BOOT IND light to come on.
−
Repeat as often as required (ice accumulation more than 5 mm (1/4 inch)).
2.4
ENGINE
ANTI
−
ICE
OPERATION
Engine anti
−
icing must be used
As defined for engine anti
−
icing operation (see page 2), and maintained ON for
at least 5 minutes after exiting icing conditions.
On ground, move CL into MIN/MAX range as soon as possible after engine start
and switch ON engine anti
−
ice.
On the ground, use the officially reported temperature when deciding upon use of
engine anti
−
ice system as temperature on EFIS is normally too high.
CAUTION
(Cont’d)
Jun 01/19