Pilot's Operating Handbook
Section 4
Normal procedures
EASA Approved
Edition 1 - January 15, 2018
Rev. 0
Page 4.5.1
4.5 - Particular procedures
● NOTE ●
The procedures and procedure elements given in this chapter Particular
procedures supplement the normal procedures or complete certain elements of
the normal procedures described in chapter(s) 4.3 and/or 4.4.
●
Flight into known icing conditions 1/5
▲ CAUTION ▲
The stall warning system does not function properly in icing conditions
and should not be relied upon to provide adequate stall warning in icing
conditions and after leaving icing conditions, if ice accretion remains on
the airplane.
Moreover, the ESP and USP functions may not be correctly engaged.
▲
General
Icing conditions exist when the OAT on the ground or in flight is + 5°C or below, and
visible moisture in anyform is present (clouds, fog with visibilityof one mile (1.6 km)or
less, rain, snow, sleet or ice crystals).
Icing conditions also exist when the OAT on the ground is + 5°C or below and when
operating on ramps, taxiways or runways where surface snow, ice, standing water or
slush may be ingested by the engine or freeze on engine or cowlings.
● NOTE ●
Refer to figure 5.5.1 to convert OAT to SAT in flight.
SAT = OAT - 2°C on the ground.
●
Flight into known icing conditions is authorized when all airplane equipment provided
for ice protection is operating correctly. This includes :
- Pneumatic deice system for inboard and outboard wing, for stabilizers and for
elevator horns.
- Propeller electrical deice system.
- Electrical heating system for both pitots and for the stall warning incidence
sensor.
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