Mooney M20M - Page 59

MOONEY
AIRCRAFT
CORPORATION
M20M
SERVICE
AND
MAINTENANCE
MANUAL
12-00-00
-SERVICING
WARNING
During
cold
weather
operation,
frequently
12-00-01
SERVICING
INTERVALS
check
fuel
gascolator
drain
for
ice
formation
by
repeating
procedures
1.,
A,
B
and
C
above.
The
specified
intervals
(refer
to
Chapter
5)
are
considered
adequate
to
meet
average
requirements
NOTE
under normal
operating
conditions.
It is
advisable,
If
conditions
conducive
to
fuel
system
icing
however,
to
shorten
service
and
maintenance
intervals
exist
Isopropyl
Alcohol
may
be
added
to
fuel
when
operating
under
abnormal
environmental
tanks. It is
extremely important
to
thoroughly
conditions,
such
as
extreme
temperature
ranges,
dusty
BLEND
the
isopropyl
alcohol
in
with the
fuel
atmospheric
conditions,
high
humidity
and
moisture,
supply
in
quantities
not
to
exceed
1%
of the
unimproved airport
facilities,
or
unusual
operating
total,
by
volume.
requirements.
2.
Defueling.
Fuel
tanks
may
be
drained
by
pumping
fuel
out
with
the
electric
boost
pump,
siphoning
fuel
12-1
0-00
-REPLENISHING
through
the filler
ports,
or
removing
tank
quick
drain
valves.
12-10-01
FUEL TANKS
WARNING
Keep
fuel
tanks
at
least
half filled
to
minimize
Allow
no
smoking
or
open
game
within
50 feet
condensation and
moisture
accumulation
in
tanks.
of the
defueling
area.
Ground
the aircraft
and
(Fuel
capacity
is
given
in
Chapter
6.)
fuel
container
during
all
defueling
operations.
WARNING
A. To
defuel
the aircraft
using
boost
pump:
Ground
the
aircraft and fuel
service
vehicle.
(1)
Disconnect
fuel
line
from
electric
boost
pump
permit
no
smoking
or
open
flame within
50
feet
outlet
at
the
fitting
forward
of the
firewall.
of
aircraft
or
vehicle.
(2)
Connect
to
output
fitting
a
Rexible
line
that
will
reach
fuel
receptacle.
WARNING
Each fuel tank is vented
to
the
atmosphere
at
(3)
Turn
fuel
selector
valve
to
the tank
to
be
its
outboard aft
corner;
vent
openings
are on
drained,
and
remove
filler
cap
from fuel
filler
port.
the lower
wing
surface. Check
vents
for
(4)
Turn
on
boost
pump
until tank
is
empty.
obstruction
before each
flight.
Repeat
steps
(3)
and
(4)
to
drain
other tank.
(5)
To
completely
drain fuel
system
also
drain
12-10-02
FUEL DRAINS
wing
sumps
and the
fuel
gascolatorvalve
sump
until
fuel
stops
running.
A
fuel-drain
valve
is
located
in
the aft
inboard
comer
of
each
tank
to
provide
for
drainage
of
moisture
and
sediment.
Use
the small
plastic
cup
furnished
with
the
NOTE
Ryaway
kit
to
drain the
fuel
sumps.
Drain
wing
tank
When
defueling
using
removable tank
quick
sumps
and
gascolator
before the first
Right
of the
day
drains
it is
only
necessary
to
remove
the
drains
and
after each
fuel
service
to
inspect
for
water
and/or
and
to
operate
the
gascolator
drain.
contamination.
Continue
draining
until free of
water
or
contamination.
12-10-03
ENGINE
OIL
Check
engine
oil
level
after
engine
has been
stopped
WARNING
long
enough
for
oil
to
drain
back into
sump.
The
oil
After
servicing
the aircraft with
fuel,
wait
at
filler
cap
access
door is
located
in the
top
cowling. Any
least five
minutes for moisture and
sediment
to
lubricating
oils
conforming
to
(MlL-L-22851
or
SAE
settle
before
draining
and
checking
both
the
J1899)
or
as
approved
by
TUCTRON-Lycoming
are
fuel tank
sumps
and the fuel selector
valve
acceptable
for
use
after
break-in
period.
Approved
drain.
products
and
engine
oil
viscosity
requirements
are
shown
in
CHAPTER
5-20-07.
1.
Fuel Gascolator
Drain.
The
fuel
gascolator
is
at
the lowest
point
in
the fuel
system
and
has
a
drain
valve
operated by
a
control
on
the
floor
in
the cabin.
To
drain
the fuel
gascolator:
A.
Switch
fuel
selector valve handle
to
L and
pull
fuel
drain valve control
ring
for
10
seconds.
B.
Switch fuel selector valve handle
to
R and
pull
fuel
drain
valve
control
ring
for
10
seconds.
C. After
draining,
be
sure
fuel
drain valve
control is
retumed
to
the
closed
position
and the valve
is
not
leaking
outside the aircraft.
4-99
12-00-00
OLDWILLWAYNE