Mooney M20M - Page 320

SERVICE
AND
MAINTENANCE MANUAL
M20M
MOONEY
AIRCRAFT
CORPORATION
77-10-02
MANIFOLD
PRESSURE
reduce
power
to
38
In.
Hg..
Manifold
pressure
varies
Manifold
pressure
is
an
indication
of
engine
power
somewhat
with
pitch
attitude
in
flight
and
therefore
affected
primarily
by
throttle
setting.
The
instrument
is
Small oscillations
may
occur
in
flight,
particularly
in
calibrated
in
inches
of
mercury
(Hg)
and
indicates
the
tu’bulent air.
pressure
in
the
induction
air
manifold.
The
RED
line of
CAUTION
38
inches
Hg.can
be
exceeded
during
cold
or
high
Do
not
over
boost the
engine
during
any
humidity
weather
conditions.
Observe
the
manifold
normal
operation. (Do
not
exceed
38
inches
pressure
gauge
during
power
settings
when
manifold
pressure).
encountering
these
type
weather
conditions
and
MANIFOLD
PRESSURE
TROUBLE SHOOTING
TROUBLE
PROBABLE
CAUSE
REMEDY
Excessive
error
at
existing
Pointer shifted.
Replace
instrument.
barometric
pressure.
Excessive
error
when
engine
is
Line
leaking. Tighten
line
connection.
running.
Sluggish
or
jerky
pointer
Improper damping
adjustment.
Adjust
damping
screw.
movement.
Broken
or
loose
cover
glass.
Vibration
or
excessive
pressure.
Replace glass
and
reseat
case.
Dull
or
discolored luminous
Age. Replace
instrument.
markings.
Incorrect
reading.
Moisture
or
oil
in
line. Disconnect lines
and
purge
with air.
77-10-03
FUEL FLOW
INDICATING
SYSTEM
Textron
Lycoming
SI No.
1422A
(or
subsequent
Refer
to
Section
73-30-00
for
this
data.
instruction).
77-20-02
CYLINDER HEAD
TEMPERATURE
77-20-00
-TEMPERATURE
INDICATING
The
cylinder
head
temperature
(CHT)
instrument
77-20-01
-TIT
INSTRUMENT/PROBE
provides
the
operator
with
an
indication
of
how hot
or
The
turbine inlet
temperature
~IT)
instrument
depicts
cool
the
cylinders
are
operating
during flight.
A
resistance
type temperature
probe
is
installed
in
the
the
temperature
of the exhaust
gases
as
they
enter
the
number
5
cylinder.
An
optional
system
provides
a
turbocharaer.
This
temperature
is controlled
by
power
probe
in
each
cylinder
to
provide
monitoring
of each
setting,
aPM
and
the
fuel
air ratio
entering
the
cylinder’s temperature.
combustion
chamber
of
the
engine
cylinders.
The TIT
should
never
exceed
17500
F.
continuous
operation.
77-20-03
-O1L TEMPERATURE
The
TIT
probe
is installed
at
the
inlet
to
the
turbocharger.
Refer
to
SECTION
79-30-02
NOTE
77-30-00
-FUEL PRESSURE
The
TIT
gauge
and
sensing
probe
should be
Refer
to
SECTION
73-20-00
removed,
and
inspected
for
proper
calibration
at
the
recommended
50
hour
inspections.
77-30-02
-O1L
PRESSURE
The
TIT
probe
should
be
re-installed
to
the
proper
Refer
to
SECTION
79-30-01
depth
in
accordance
with
instructions
providedin
77-10-02
4-99
OLDWILLWAYNE