ICE AND RAIN PROTECTION
Operation
Aircraft Operations Manual
11.2
PAGE
6
CONDITIONS
NORMAL PROCEDURES
(Cont’d)
When switching Engine Anti
−
ice ON or OFF check proper function by observing a
decrease or increase in engine torque setting. If no decrease or increase, reduce
power to below 88 % Ng, cycle switch (OFF then ON) and then increase to max
cruise power to restore proper function.
NOTE
APPLICABLE TO AIRCRAFT WITH COX INTAKES (Mod No 2095 installed). In
extremely cold temperatures L/R INTAKE light may come on after engine anti
−
ice
activation because of the relatively long time to reach working temperature. Se-
lecting the switch to OFF then ON will solve the problem since at this time the
intake has been preheated.
NOTE
Except for the first 6 minutes after liftoff, make sure to have a speed not less than
the published minimum speed with engine Anti
−
ice ON (speeds with applicable
ice increment) before selecting engine Anti
−
ice ON.
CAUTION
When Engine
−
Anti
−
ice required
1.
ENGINE anti
−
ice switches
ON (one at a time
. . . . . . . . . . . . . . . . . . . . . . .
to check engine
stabilization)
−
Check L/R ENG ANTI
−
ICE light to come on. For a/c with Mod.no. 3529 340B
/ 3530 340WT the Improved Stall Warning System for Icing condition will be
”armed” or ”activated” depending on flight phase and elapsed time from lift
−
off.
For corrections to thrust settings, see section 26 POWER SETTINGS.
When engine anti
−
ice no longer required
To avoid exceeding torque setting chart limit, a reduction in torque may be re-
quired before switching OFF the engine anti
−
ice system.
NOTE
2.
ENGINE anti
−
ice switches
OFF(one at a time
. . . . . . . . . . . . . . . . . . . . . . .
to check engine
stabilization)
−
Check L/R ENG ANTI
−
ICE lights to go out.
Jun 01/20