SECTION 4
NORMAL PROCEDURES
D.G.A.C. Approved
T B M
700 PILOT’S INFORMATION MANUAL
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Page 4.5.5
Rev. 6
PARTICULAR PROCEDURES
FLIGHT INTO KNOWN ICING CONDITIONS (Cont’d)
Ice accumulation effects
When ice has accumulated on the unprotected surfaces of the airplane,
aerodynamic characteristics may be changed.
Particularly stall speeds may increase by up to :
– Flaps UP 20 KIAS
– Flaps TO 15 KIAS
– Flaps LDG 10 KIAS
Correct operation of the aural stall warning may be altered by severe or
prolonged icing.
Indeed, in case of severe or prolonged icing, an ice concretion due to
refreezing around the heated stall warning may appear.
Above–recommended speeds take into account, on one side, the stall speed
increase due to profile shape deterioration and, on the other side, the weight
increase of the iced–up airplane (taking as a basis the airplane maximum
weight when not iced–up).
Rate of climb values with ice accumulation on the unprotected surfaces are to
be decreased by 10 %.
Cruise speeds may be decreased by 10 %, if cruise power is not changed, or
more, if cruise power setting should be decreased due to the additional
inertial separator limitations (ITT limitation).
Because of the higher landing speed, landing distances will be increased. In
the landing configuration, using 90 KIAS approach speed increases landing
distance by 20 % – refer to Chapter 5.13 ”LANDING DISTANCES”.
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