In Flight - Piper PA-46-350P Malibu Mirage Pilot's Manual And Operation Manual

PA-46-350P, MALIBU

IN FLIGHT

Icing conditions of any kind should be avoided whenever possible, since
any minor malfunction which may occur is potentially more serious in icing
conditions. Continuous attention of the pilot is required to monitor the rate
of ice build-up in order to effect the boot cycle at the optimum time. Boots
should be cycled when ice has built to between 1/4 and 1/2 inch thickness on the
leading edge to assure proper ice removal. Repeated boot cycles at less than
1/4 inch can cause a cavity to form under the ice and prevent removal; boot
cycles at thicknesses greater than 1/2 inch may also fail to remove ice.
Before entering probable icing conditions use the following procedures:
(a) INDUCTION AIR ...........................................................ALTERNATE
(b) PITOT HEAT switch ........................................................................ON
(c) S. WRN HEAT switch .....................................................................ON
(d) WSHLD LO switch ..............................ON (WSHLD HI in actual ice)
(e) PROP HEAT switch .........................................................................ON
(f) DEFROST knob ............................................................................OUT
(g) VENT/DEFOG BLWR switch ...................................ON, if additional
(h) SURFACE DEICE switch .................................activate after 1/4 to 1/2
(i) Relieve propeller unbalance (if required) by exercising propeller
control briefly. Repeat as required.
For accurate magnetic compass readings. turn the
WSHLD LO and HI, PROP HEAT and PITOT
HEAT switches OFF momentarily.
Do not cycle surface boots with less than 1/4 inch of ice
accumulation. Operation of boots with less than 1/4
inch of ice accumulation can result in failure to
remove ice. Do not hold the momentary SURFACE
DEICE switch on.
Elevator movement should be periodically checked
prior to the first surface boot inflation in order to
prevent an ice cap from forming between the
elevator and stabilizer.
Operation of the pneumatic deice system is not
recommended in temperatures below -40°C.
Such operation may result in damage to the
deicer boots.
ISSUED: FEBRUARY 23, 1999
NOTE
WARNING
WARNING
CAUTION
SECTION 9
SUPPLEMENT 3
defrost is desired
inch accumulation
REPORT: VB-1710
7 of 16, 9-21