Mooney M20K - General; Pitot, Description & Operation; Propellers, Description & Operation

SERVICE
AND
MAINTENANCE
MANUAL
M20K
MOONC/
AIRCRAFT
CORPORATION
30-0040
-GENERAL
Propeller
ice
removal
is
accomplished
by
optional
The
M20K
aircraft
incorporates
an
alternate
air
system
electrically
heated de-ice
boots
bonded
to
each
that
is
designed
to
be
opened
manually
(25´•0001
thru
propeller
blade.
The
system
uses
the
airplane’s
25-0780)
or
automatically
(25-0781
thru
25-TEA)
any
electrical
power
to
heat
the
de-ice
boots
in
cycles
time
the
air
intake
system
becomes
blocked.
This
controlled
by
a
timer. The
ON/OFF
switch
is
located
on
system
should
be
inspected
to
assure
that
no
heated
the
switch
panel
in
Front
of the
pilots
right
knee.
A
current
flow
of
8
12
amps
(12
Volt
system)
(8
amps
air
is
enten’ng
the
induction
system
dun’ng
mutine
24 Volt
System)
is
depicted
on
the
propeller
de-ice
engine
operation.
(See
Section 71-62-00
for
n’gging
ammeter
located
in front
of
the
co-pilot
at
the
top
of the
instructions).
radio
panel.
On
the
12
Volt
aircraft,
a
deflection
of
the
This
aircraff
includes as
standard
equipment
a
heated
ammeter
needle
will
be
noticed
approximately every
90
pitot
tube
assembly
and
may
also
include
an
optional
seconds;
this
is
due
to
the
cycling
action
of current
flow
electn’cally
operated
propeller
de-ice
system.
to
the
circuits
within
the
boot
as
controlled
by
the
timer.
On the
24 Volt
system
aircraft,
S/N 25-1000
8
ON,
the
30-3090
-PIIOT,
DESCRIPTIONAND
ammeter
will
go
full defledjon
each 90
seconds
as
the
OPERATION
timer
turns
the
de-ice
boots
ON/OFF/ON.
SM
25-1225
A
standard
heated
pitot
tube
is
located
on
the
left
wing
thru
25-TEA
have
a
BLUE
light,
"PROP
DE-ICE",
on
at
Wing
Station
No.
145.
The
pitot
heat
circuit
breaker
the
annunciator
panel.
This
light
will
illuminate
at
each
switch
located
on
the
panel
in
front
of
the
pilots
n’ght
cycle
(every
90
seconds)
the
boots
are
drawing
current
knee
supplies
power
to
the
pitot
tube
heating
element.
(cycling
ON/OFF/ON).
The
BUS
LOAD
meterwill
show
A
BLUE
light
will
illuminate
on
the
annunciator
panel
an
additional
8
amps
each
90
second
interval
as
the
when
the Pitot
Heat
switch
has
been
pushed
ON
and
timer
tums
the
de-ice
boots
ON/OFF/ON.
This
is
current
is
being
drawn
by
the
element.
On
some
normal
operation.
The timer
is located on
the
circuit
foreign
aircraft
a
RED
light
will
illuminate
when
the
pitot
breaker
panel
side
tray
above
the
co-pilots
n’ght
knee.
heat
element
is
NOT
drawing
any
culient
and will
be
Deicer
boot
replacement
should
be
done
per
B.F.
OFF
when
properly
operating.
Goodrich
Report
59-728J
which
is
supplied
with
the
306090
PROPELLERS,
DESCRIPTION
AND
kits for
replacement
boots
(Fig.
30-1).
OPERATION
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VOLT
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PROPELLER
DE-ICESYSTEMS
FIGURE30-1
30-00-00
OLDWILLWAYNE