Section
VII
Systems
Description
BEECHCRAFT
Baron
58
Serial
TH
773
and
After
ELECTROTHERMAL PROPELLER DEICE (2 and 3 BLADES)
Propeller ice removal is accomplished by the
electrically
heated deice boots bonded to each propeller blade. The sys-
tem uses
the
aircraft
electrical
power
to
heat
portions
of
the
deice boots in a sequence controlled by a
timer.
The system
is controlled by an ON-OFF
switch
on the
pilot's
subpanel.
When
the
system is
turned
on
the
ammeter
will
register
7 to
12 amperes on
the
2 blade propeller, or 14 to 18 amperes on
the 3 blade propeller. The system can be operated
contin-
uously in
flight;
it
will
function
automatically
until
the
switch
is
turned
off. Propeller
imbalance
can be relieved by
varying rpm. Increase rpm briefly,
then
return
to
the
de-
sired setting. Repeat if necessary.
CAUTION
Do not operate the system
with
the
engines
in-
operatve.
,PITOT
HEAT
Heating
elements
are installed in the
pitot
mast(s). Each
heating
element
is controlled by an
individual
switch
lo-
cated on the
pilot's
subpanel. The
switches
are placarded
PITOT HEAT - LT - RT, and should
remain
off
during
ground
operations, except
for
testing or
for
short
intervals
of
time
to
remove ice or
snow
from the mast(s).
STALL WARNING ANTI-ICE
The
mounting
pad and the stall
warning
vane are equipped
with
a heati ng
element
that
is activated any
time
the
switch
placarded PITOT HEAT - LT, is on.
7-42
October
1976
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