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and wing rear upper surface is required during the External Walkaround inspection to determine
that the wing is free from frost, ice, snow or slush when:
• the outside air temperature (OAT) is 5°C (41°F) or less, or
• the wing fuel temperature is 0°C (32°F) or less; or
• the atmospheric conditions have been conducive to frost formation.
NOTE
Ice and frost may continue to adhere to wing surfaces for some time
even at outside air temperatures above 5°C (41°F).
LIMITATIONS
Operating Limitations
02−04−3
REV 77, Oct 20/09
DOT Approved
CL−604 Airplane Flight Manual
PSP 604−1
4. OPERATION IN ICING CONDITIONS
During cold weather operations, the flight crew must ensure that the airplane fuselage, wings and
tail surfaces are free from ice, snow or frost.
AR Certified Airplanes
WARNING
Even small accumulations of ice on the wing leading edge can
change the stall speed, stall characteristics or the warning margin
provided by the stall protection computer.
A. Cowl Anti-ice System
(1) Ground Operations
The engine cowl anti-ice system must be on when the OAT is 10°C (50°F) or below and
visible moisture in any form is present (such as fog with visibility of one mile or less, rain,
snow, sleet and ice crystals).
The engine cowl anti-ice system must also be on when the OAT is 10°C (50°F) or below
when operating on runways, ramps, or taxiways where surface snow, ice, standing water
or slush is present.
(2) Flight Operations
NOTE
Icing conditions exist in flight at a TAT of 10°C (50°F) or below and
visible moisture in any form is encountered (such as clouds, rain, snow,
sleet or ice crystals), except when the SAT is –40°C (–40°F) or below.
The engine cowl anti-ice system must be on:
At or above 22,000 feet:
• when ice is indicated by the ice detection system, or
• when in icing conditions, if an ice detector has failed.
Below 22,000 feet:
• when in icing conditions, or
• when ice is indicated by the ice detection system.
LIMITATIONS
Operating Limitations
02−04−4
REV 77, Oct 20/09
DOT Approved
CL−604 Airplane Flight Manual
PSP 604−1
4. OPERATION IN ICING CONDITIONS (CONT'D)
B. Wing Anti-ice System
(1) Ground Operations
NOTE
Icing conditions exist on the ground when the OAT is 5°C (41°F) or
below and:
1. visible moisture in any form (such as clouds, fog or mist) is present
below 400 feet AGL, or
2. the runway is wet or contaminated, or
3. in the presence of any precipitation (such as rain, snow, sleet or ice
crystals).
The wing anti-ice system must be selected ON, for final taxi prior to take-off, if the OAT is
5°C (41°F) or below, unless Type II, III or IV anti-icing fluids have been applied. Single
engine taxi operations are prohibited in these conditions.
NOTE
1. L (R) WING A/ICE caution messages may be posted or L HEAT or
R HEAT lights may go out during taxi but caution messages must be
verified out and WING A/ICE ON or WING/COWL A/ICE ON
advisory message and L HEAT and R HEAT lights must be verified
on, prior to take-off. If wing anti-ice is not required for take-off it
should be selected OFF just prior to take-off.
2. To prevent wing contamination from reverse jet blast, operating the
thrust reversers during taxi operations on wet and contaminated
surfaces should be avoided.
The wing anti-ice system must be selected and confirmed ON for take-off, when the OAT
is 5°C (41°F) or below and:
• visible moisture in any form (such as clouds, fog or mist) is present below 400 feet
AGL, or
• the runway is wet or contaminated, or
• in the presence of any precipitation (such as rain, snow, sleet or ice crystals).
NOTE
If wing anti-ice is selected ON for take-off, the cowl anti-ice must also
be selected ON.
When Type II, III or IV anti-icing fluids have been applied, the wing anti-ice system must
only be selected and confirmed ON just prior to thrust increase for take-off.
Refer to the Operating Manual, Volume 1, Chapter 6; SUPPLEMENTARY
PROCEDURES – COLD WEATHER OPERATION – PHASE OF FLIGHT
PROCEDURES.
LIMITATIONS
Operating Limitations
02−04−5
REV 77, Oct 20/09
DOT Approved
CL−604 Airplane Flight Manual
PSP 604−1
4. OPERATION IN ICING CONDITIONS (CONT'D)
B. Wing Anti-ice System (Cont’d)
AR Certified Airplanes
WARNING
When the OAT is 5°C (41°F) or below use deicing/anti-icing
　
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