Mooney M20K - Stabilizer Trim System

MOONN
AIRCRAFT
CORPORATION
M20K
SERVICE
AND
MAINTENANCE
MANUAL
8.
Level
aircraft
and
set
control
column
in
neutral
2731-00
-VARIABLE
DOWNSPRING
SYSTEM
with
stabilizer
parallel
to
center
line
of
aircr‘aff.
NOTE
Adjust
rod
end
bearings
of
control
tube
(L),
(Figure
27-6),
at
rear
tailcone
bulkhead,
at
elevator
horn
rod
end
(9),
(Figure
27-7)
or
as
last
resort
at
main
spar
adjustable
rod
end
bearing
to
obtain
additional
elevator
travel.
N
R’ ,E
M
SMK27-9
P
I
FIGURE
27-9
VARIABLE
DOWNSPRING
A
spn’ng
hooked
into
the
elevator
control
system
in the
tailcone
refines
the
feel
of
the
elevator
in
flight.
A
bellcrank
and
cable
tailors
the
spring
tension
SM27-8
appropn’ate
to
the
tn’mmed
position
of
the
stabilizer.
FIGURE
27-8/RUDDER
8
ELEV.
STOP
NOTE
NOTE
Negative
stabilizer
degrees)
settings
mean
Measure
elevator
travel
from
8
degrees
that
stabilizer
leading
edge
is
moved
down
stabilizer
thrust
line
with
travel
board
relative
to
the
thrust
line.
positioned
at
stabilizer
station
16.00
as
Wrth
stabilizer
set
at
maximum
positive
setting
and
indicated
on
travel
board
PM
GsE
030004
and
elevators
FULL
DOWN,
adjust
turnbuckle
for
a
14.0
to
with
stabilizer
at
O
degrees.
(See
Figure
27-11
16.0
Lb.
tensiometer
reading
on
cable
(20
Lb.
max
and
Figure
273A
for
travel
board
placement.
permissable).
Check
for
positive
clearance
betuYeen
cable
and
pulley
sheave.
C.
Set
stops
(P)
(Figure
27-8),
in
empennage
stinger
for
elevator
;ptravel
and
downtravel
of 20
A.
Set
stabiber
to
maximum
negative
position
and
degrees
to
22
degrees.
elevators
full
down.
NOTE
B.
Adjust
turn
buckle
to
remove
slack
in
cable
Elevator
bellcrank,
aft
taiicone,
should
be
(Figure
27-9).
modified
perSIN120-44.
C.
Retrim
to
maximum
positive
setting
and
check
for
clearance
between
cable
end
and
pulley
sheave.
D.
After
elevator
stops
are
set,
rotate
elevators
thru
Tensionmeter
reading
should
be 20
Ib.
maximum.
full
range
of
travel
to
assure
solid
contact
with
stops
and
that nuts
and
bolt
heads
clear
stop
limiter
(E).
Stop
27~0-00
STABILIZER
TRIM
SYSTEM
limiter
may
be
bent
to
obtain
clearances
and
contact
To
provide
pitch
tn’m
control,
the
entire
empennage
(Figure
27-8).
pivots
around
its
main
hinge
points.
The
system
E.
Rotate
tn’m
full
down
to
check
clearance
of
consists
of
a
manually
operated
actuator
that
operates
bellcrank
at
wing
rear
spar.
Adjust
rod
end
bean’ng
at
a
sen’es
of
torque
tubes
and
universal
joints
connected
rear
tailcone
bulkhead
a
needed
for
clearance.
to
a
jack
screw
on
the
aft
tailcone
bulkhead.
Recheck
elevator
up
and
down
travel.
F. Rotate
tn’m
full
up;
check
that
elevator
up
stops
(P)
make
solid
contact
on
elevator
stop
limiter
(E).
G.
Retighten
alljam
nuts,
attach
bolts
and
secure
as
necessary;
recheck
all
control
tube
clearances
and
travel
limits.
27-31-00
OLDWILLWAYNE