Piper Malibu PA-46-310P Pilot Operating Handbook page 448

PIPER AIRCRAFf CORPORATION
PA-46-310P, MALIBU
SECTION9
SUPPLEMENT 10
than 1 /4 inch can cause a cavity to fonn 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
(h)
PITOT HEAT switch ......................................................................... ON
(c) S. WRN HEAT switch ...................................................................... ON
(d) WSHD HEAT switch ........................................................................ ON
(e) PROP HEATswitch .......................................................................... ON
(0
DEFROST knob ............................................................................. OUT
(g) VENT/DEFOG switch ................................................. ON, if additional
defrost is desired
(h) SURF DEICE switch ......................................... activate after 1/4 to 1/2
inch accumulation
(i) Relieve propeller unbalance (if required) by exercising propeller
control briefly. Repeat as required.
NOTE
For accurate magnetic compass readings, turn
the WSHD HEAT, PROP HEAT and PITOT
HEAT switches OFF momentarily.
WARNINGS
Do not cycle surface boots with less than 1/4
inch of ice accumulation. Operation of boots
with less than l/4 inch of ice accumulation can
result in failure to remove ice. Do not hold the
momentary SURF 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.
CAUTION
Operation of the pneumatic deice system is not
recommended in temperatures below -40°C. Such
operation may result in damage to the deicer
boots.
The aircraft ammeter should be monitored whenever the deice equip-
ment is in use. Excessive ammeter indications show excessive electrical load,
~
which may cause a battery discharging condition that could eventually lead to
battery depletion. Non-essential electrical equipment should be turned off to
correct or prevent this condition.
ISSUED: JULY 30, 1984
REVISED: FEBRUARY 7, 1990
REPORT: VB-1200
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