Cessna TURBO CENTURION T210M 1978 Pilot Operating Handbook page 218

WING AND STABILIZER
DE-ICE SYSTEM
(MODEL T210)
PILOT'S OPERATING HANDBOOK
SUPPLEMENT
SECTION 2
LIMITATIONS
There is no change to the airplane limitations when the de-ice system
is installed; intentional flight into known icing conditions is prohibited,
regardless of installed ice protection equipment.
SECTION 3
EMERGENCY PROCEDURES
There is no change to the airplane emergency procedures when the de-
ice system is installed.
SECTION 4
NORMAL PROCEDURES
De-icing boots are intended for removal of ice after it has accumulated
rather than prevent its formation.
If
ice accumulation is slow, best results
can be obtained by not using the de-ice system until approximately 1/2
inch of ice has accumulated. Clear the accumulation with one or two cycles
of operation. Do not repeat de-icing procedure until ice has again accumu-
lated.
Cycling the de-icing boots produces no adverse aerodynamic effects in
any attitude within the allowable flight limitations. Continual cycling of
the de-ice system, however, is not recommended as this may cause ice to
form outside the contour of the inflated boots, preventing its removal.
NOTE
Since wing and horizontal stabilizer de-icer boots alone do
not provide adequate protection for the entire airplane,
known icing conditions should be avoided whenever pos-
sible. If icing is encountered, close attention should be
given to the pitot-static system, propeller, induction sys-
tem and other components subject to icing.
PREFLIGHT INSPECTION
Prior to flight, make an exterior inspection to check the de-icing boots
for tears, abrasions, and cleanliness. Boots must be cleaned and damage
repaired prior to flight.
2