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conducive to frost formation, select the wing anti-ice system on and
advance the thrust levers, as required, until the L WING A/ICE and R
WING A/ICE caution messages are extinguished, to remove any
potential uncertainty about the state of the leading edges.
Whenever the aircraft has been held over for a considerable time on
the ground in conditions conducive to frost formation, just prior to
take-off, select the wing anti-ice system on and advance the thrust
levers, as required, until the L WING A/ICE and R WING A/ICE
caution messages are extinguished, to remove any potential
uncertainty about the state of the leading edges.
WARNING
Ground use of the wing anti-ice system is intended to complement, and
not replace , ground deicing/anti-icing and inspection procedures.
Close inspection is still required to ensure that no frost, snow or ice is
adhering to critical surfaces.
SUPPLEMENTARY PROCEDURES
Cold Weather Operations
Vol. 1 06−12−26
REV 74, Nov 07/08
▼
CL−604 Operating Manual
PSP 604−6
8. PHASE OF FLIGHT PROCEDURES (CONT'D)
C. After Engine Start (Cont’d)
(3) Engine instruments.............................................Monitor • Do not operate engines
above idle power until
engine indications have
returned to normal. Make
thrust lever movements
cautiously.
• If a sudden unexplainable
rise in ITT occurs, shut
down engine immediately.
• When moderate to severe
icing conditions are present
during prolonged ground
operation, periodic engine
run-ups to as high a thrust
setting as practical are
recommended. This run-up
should be done for a
minimum of 15 seconds
each at 10 minute intervals.
This action is effective in
dissipating fan blade icing.
• Do not increase to take-off
thrust until normal engine
operation has been
achieved and indications
stabilized.
CAUTION
At temperatures below −20°C (−4°F), the condensation and freezing of
moisture in thrust reverser components may degrade the performance
of the thrust reversers. The risk of this occurrence is highest when
airplanes hangared in relatively warm ambient conditions are readied
for flight in freezing conditions.
NOTE
To clear the thrust reversers of frozen moisture during the above described
conditions, it is recommended that the thrust reversers be actuated until the
deploy and stow cycles are less than 5 seconds.
SUPPLEMENTARY PROCEDURES
Cold Weather Operations
Vol. 1 06−12−27
REV 74, Nov 07/08
CL−604 Operating Manual
PSP 604−6
8. PHASE OF FLIGHT PROCEDURES (CONT'D)
D. Taxi-Out
Considerations:
• Avoid large nosewheel steering inputs.
• Always taxi at a manageable speed (10 knots maximum is recommended).
• Maintain a greater distance than normal between airplanes, especially when slush,
standing water, ice or snow is present on surfaces of the movement area.
• Application of brakes should be kept to a minimum during turns.
• Be aware of increased residual thrust at cold temperatures.
• Be aware of increased stopping distances, engine exhaust of the airplane ahead,
obscured runway, taxiway or ramp markings, snowbanks and crosswind conditions.
• DO NOT use thrust reversers if movement area surfaces are covered with slush, ice,
standing water or snow, except in the interest of safety.
• If taxiways are contaminated, delay flap extension and taxi checklist until prior to
take-off.
(1) Brakes .................................................................. Warm Perform the following number
of firm brake applications from
25 knots to 10 knots. Perform
the prescribed number of
brake applications during the
last mile/kilometer of taxi prior
to and not including the final
stop or snub before take-off.
Do not drag the brakes.
AIRPLANE WEIGHT NUMBER OF BRAKE APPLICATIONS
Greater than 42,000 lb 5
36,000 to 42,000 lb 6
Less than 36.000 lb 7
NOTE
1. Use of symmetric braking is recommended, to ensure uniform brake
heating.
2. Warming of the brakes will preclude the chance of water saturated
brakes freezing at altitude and being locked for landing touchdown.
(2) Nose wheel steering.............................................Check Nose wheel steering should
be exercised in both directions
during taxi.
SUPPLEMENTARY PROCEDURES
Cold Weather Operations
Vol. 1 06−12−28
REV 77, Oct 20/09
▼
CL−604 Operating Manual
　
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