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YD 1 or YD 2 may disengage.
(1) Approach ................................Continue to Category I minima, or
initiate go-around.
END
SUPPLEMENTARY PROCEDURES
Category II Operation
Vol. 1 06−10B−10
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
7. PERFORMANCE
The performance data in Chapter 6 of the Airplane Flight Manual are applicable, except as
modified by the following:
A. Maximum Landing Weight Limited By Climb Requirements – Approach Flaps 20° /
Landing Flaps 45°
The maximum landing weight limited by climb requirements for varying conditions of airport
pressure altitude and temperature for the flaps 20° approach climb configuration and a
subsequent landing flaps 45° configuration, are given in Figure 06−10B−1. The chart
incorporates all applicable anti-icing and 10th stage bleeds combinations.
NOTE
If ice accumulation is suspected on unprotected surfaces, then reduce the
maximum landing weight values derived from Figure 06−10B−1 by 800 kg
(1764 lb).
Example: ANTI-ICE ON
Associated Conditions:
Temperature = −8° C
Airport pressure altitude = 4,000 ft
Cowl anti-ice = On
10th stage bleeds = Closed
For the above associated conditions (Anti-ice On), the maximum landing weight limited by
climb requirements is 24,100 kg (53,131 lb). The landing weight in this case is greater than
the maximum approved landing weight (Refer to: Chapter 2; LIMITATIONS – STRUCTURAL
WEIGHT) and is not considered limiting.
Example: ANTI-ICE OFF
Associated Conditions:
Temperature = 27° C
Airport pressure altitude = 4,000 ft
Wing and cowl anti-ice = Off
10th stage bleeds = Closed
For the above associated conditions (Anti-ice Off), the maximum landing weight limited by
climb requirements is 23,700 kg (52,250 lb). The landing weight in this case is greater than
the maximum approved landing weight (Refer to: Chapter 2; LIMITATIONS – STRUCTURAL
WEIGHT) and is not considered limiting.
SUPPLEMENTARY PROCEDURES
Category II Operation
Vol. 1 06−10B−11
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
DFM0704A_001 ldg_watlim_405_ha_Cll.uni
SUPPLEMENTARY PROCEDURES
Category II Operation
Vol. 1 06−10B−12
REV 66, Feb 01/07
Landing Weight Limited by Climb Requirements − Approach Flaps 20°/Landing Flaps 45°
Figure 06−10B−1
CL−604 Operating Manual
PSP 604−6
1. ICING CONDITIONS
Icing conditions exist when the total air temperature is below 10°C (50°F), and visible moisture is
present in any form. This includes cloud, fog, mist, rain, snow, sleet and ice crystals. Regardless
of visible ambient moisture and temperature clues, icing conditions also exist when there are
visible signs of ice accumulation on the airplane, or when indicated by the ice detection system.
2. CLOUD FORMS
In discussion of icing, cloud types can be categorized into two general classifications; stratiform
(layer type clouds) or cumuliform (rising, thunderstorm) clouds. The certification requirements
define icing envelopes conforming to these cloud types, corresponding to continuous (stratiform)
icing and intermittent (cumulous) icing types.
3. ICING PROCESS
Icing results from super-cooled water droplets that remain in a liquid state, at temperatures below
freezing. In general, leading edge structures, passing through such conditions, will cause a
certain number of these droplets to impact the leading edge surface, and freeze. A relatively
large or bluff body will generate a large pressure wave ahead of the leading edge, which forces
the air and many of the smaller droplets around it. Only droplets with sufficient mass and inertia
will impact the surface and freeze. Conversely, a narrow leading edge radius generates a smaller
pressure wave, and so collects more of the lower mass inertia droplets. Ice will thus tend to
accumulate at a greater rate on the (smaller, narrower) tail leading surfaces. Ice will also tend to
accumulate in greater quantities, and cover a larger part of the leading edge, if the ambient liquid
water droplets are relatively large.
4. ICE FORM
Three recognizable ice forms exist; rime ice (opaque), glaze ice (clear) and frost. It is also
common to observe mixed form icing, comprised of mixed glaze and rime ice forms.
• Rime ice is rough and opaque in appearance, and generally forms a pointed or streamlined
shape on the leading edge.
• Glaze ice is transparent, and often produces a wedge shape or concave ice shape with
　
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