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• Engine air intake (to prevent
ingestion)/engine exhaust,
APU inlet, and APU
exhaust;
• Antennas;
• Vents and drains;
• Winglets;
• Wheels and brakes (to
prevent thermal damage).
CAUTION
Application of deicing/anti-icing fluid on wheel brake assemblies will
seriously degrade braking performance.
NOTE
A spray trajectory of 3 meters (10 feet) is recommended to ensure that
direct spray does not damage airplane surfaces.
(11) Airplane .................................................. Head into wind if possible.
SUPPLEMENTARY PROCEDURES
Cold Weather Operations
Vol. 1 06−12−21
REV 74, Nov 07/08
CL−604 Operating Manual
PSP 604−6
6. AIRFRAME DEICING, ANTI-ICING, AND INSPECTION (CONT'D)
E. Deicing/Anti-Icing
CAUTION
1. Under no circumstances can an airplane that has been anti-iced receive another
coat of Type II or Type IV fluid on top of the existing film. If the holdover time is
exceeded, surfaces must first be deiced with a mixture of hot water and deicing
fluid, before another application of Type II or Type IV fluid is made.
2. Type II, III and IV fluid must never be applied to the windshields and side
windows.
3. Application of deicing/anti-icing fluid on wheel brake assemblies will seriously
degrade braking performance.
4. With the APU operating, ingestion of deicing fluid will contaminate the
air-conditioning system, and cause objectionable fumes (causing throat irritation)
and odours to enter the airplane. This may also cause erratic operation and
possible damage to the APU.
5. Under no circumstances should spray be directed at the trailing edges of control
surfaces. Such spray may force partially melted contamination into hinge
mechanisms, and under control shrouds, with risk of later re-freezing.
NOTE
1. If heated pure water is used for the first step, the second step must be
completed before re-freezing occurs; as a general rule, within 3
minutes of the beginning of the deicing step. This short period makes it
necessary to deice/anti-ice relatively small areas of the airplane
successively.
2. Considering the nature of the precipitation present and the likely
duration of the delay between the completion of the anti-icing step and
take-off, use the applicable holdover table to determine the fluid/water
mixture that will provide the most effective anti-ice protection.
3. A spray trajectory of 3 meters (10 feet) is recommended to ensure that
direct spray does not damage airplane surfaces.
4. On flight control surfaces, application should always be from leading
edge to trailing edge and from outer panels to inner panels.
(1) Fluid.......................................................................Apply in the following sequence:
• Horizontal stabilizer
• Vertical stabilizer
• Top of fuselage
• Sides of fuselage
• Wings.
SUPPLEMENTARY PROCEDURES
Cold Weather Operations
Vol. 1 06−12−22
REV 74, Nov 07/08
▼
CL−604 Operating Manual
PSP 604−6
6. AIRFRAME DEICING, ANTI-ICING, AND INSPECTION (CONT'D)
After Deicing/Anti-icing Spraying:
(2) Deicing ............................................................... Inspect areas listed below, to confirm
complete deicing:
• Wings – leading edges,
upper and lower surfaces;
• Upper fuselage;
• Vertical and horizontal
stabilizers – leading edges,
upper/lower surfaces and
side panels;
• Flaps, flap tracks and flap
drives;
• Ailerons, elevators, rudder
and spoilers;
• Air data probes/sensors,
AOA vanes;
• Antennas;
• Fuel drains and NACA vent
scoops;
• Engine and APU intakes;
APU exhaust;
• Landing gear and landing
gear bays;
• Windshield, windows; door
sills and surrounds.
If engines/APU are operating:
(3) Thrust ..............................................Increase to 60% N1 for 20 seconds, to clear
residual fluid.
(4) BLEED AIR, 14TH STAGE L and
R switch/lights ...................................................Press in Check L and R 14TH STAGE
CLOSED lights out.
(5) ANTI-ICE, WING and COWL ...................... As required
NOTE
Wait 2 minutes before opening the 10th stage bleed air valves and
turning on the packs, to avoid contaminating the air-conditioning
system with deicing/anti-icing fluid. Contamination will cause
objectionable fumes (causing throat irritation) and odours to enter the
airplane.
　
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