Mooney M20K - General Operating Procedures

MOONEY
AIRCRAFT
CORPORATION
M20K
SERVICE
AND
MAINTENANCE
MANUAL
H.
When
all
adjustments
have been
made and
all
73-31-05
TROUBLESHOOTING
SDI
(Hoskins)
connections
checked
for
security,
install
the
cowling
FUEL
MANAGEMENT
SYSTEMS
per
Section
71-10-00.
Troubleshooting
any
Hoskins
fuel
management sys-
73-31-03
GENERAL
OPERATING
tems
should
be
approached
in
a
systematic
manner.
PROCEDURES
All
problems
can
be
put
in
one
to
five
categories:
Improper
operation
due
to
lack
of
knowledge
i.
Turn
aircraft
master
switch ON.
When
the
aircraft
electrical
system
is
activated,
the
FT-101
display
will
about
the
system.
flash
zeros
(000.0).
This
flashing
is
a
reminder
for
the
Inoperative
computer
or
main
instrument.
pilot
to
reset
or
check
the
fuel used
by
pressing
either
Inoperative
transducer.
the
RESET
or
USED/TEST
button.
Once
the
RESET
or
Improper
win’ng.
USED/TEST
button
is
depressed,
the
display
will
stop
Improper
transducer
installation.
flashing
and
read
fuel flow.
1.
MEMORY LOSS
The
TRU
FLOW
1
will
display
the
configuration
unit
of
A. Loses
memory
when
Master
switch
is turned
measure
and
K-factor
on
the
right
hand side
of
display
OFF.
window
(refer
to
Fig.
73-5).
(1)
Check "Fuel
Flow
Memory"
switch
ON.
After
starting
the
aircraft
engine,
the
FT-101
will
con-
(2)
If
switch
is
ON,
check
clock for
operation.
tinuously
display
fuel Row.
Total
Fuel Used
may
be dis-
(3)
If
clock
inoperative,
replace
fuse
at
battery.
played
by pressing
and
holding
the
USEDTTEST
button
(4)
If
no
problem
found,
remove
connector
on
the
right
of
the instrument.
Total
Fuel
Used
will
be
from
unit,
check
Pin
9
for bus
voltage.
displayed
as
long
as
the
USEDTTEST
button
is
(5)
If
voltage
present,
replace
FT-101/101A.
depressed
(or
for
2
seconds),
whichever comes
first.
B.
Memory
scrambles
when
engine
starts.
This
number
may
be
reset to
zero
(0.0)
by
depressing
and
holding
the
RESET button for
at
least
1
second.
Exchange
FT-101 for
modified unit.
The
TRU
FLOW
1
displays
both
functions
simul-
2´•
DOES
NOT
INDICATE
taneously.
A. No
display.
2.
The
totalizer function
in
either
system
may
be
(1)
Remove
connector
from
indicator.
Check
used
as
a
single night
totalizer
or
as
a
long
term
Pin
1
of
harness
connector
for
bus
voltage.
Check
Pin
totalizer.Both
methods
are
explained
below.
8
for airframe
ground.
If
OK,
change
indicator.
A.
SINGLE
FLIGHT
TOTALIZER.
The
aircraft
B.
Displays
zeros
(with
engine
running)
should
be
topped
with
fuel
before each
Right
so
the
(1)
Remove
cowling
for
access
to
transducer.
Remove
insulating
sleeving
from
connections
on
all
total usable
fuel
will
be
known.
Turn
the
aircraft
wires.
Check
BLACK
wire for
~VF
ground.
Check
RED
MASTER
switch
ON. Push
and
hold
the
reset
button,
wire for
bus
voltage.
Check
WHITE wire for
2-3
volts
located
on
the
left
of either
instrument,
for
at least
1
with
no
fuel
flow and
increasing
to
near
bus
voltage
at
second.
The
RESET
button
has
a
one
half second
fullRow.
(2)
If
no
increase
in
voltage
is
seen
on
WHITE
delay
to
prevent
accidental
reset.
wire
as
Row
increases
or
if
too
high
a
voltage
indica-
On
starting
the
engine,
the
FT-101
will
begin displaying
fuel flow.
Total fuel used
may
be checked
by
depress-
tion is
seen
with
no
Row,
change
transducer.
(3)
If RED
wire does
not
have
bus
voltage,
ing
the
USED/TEST
button.
B.
LONG
TERM TOTALIZER.
Tum the
aircraft
check
wiring
from transducer
to
Pin
3
of
indicator.
(4)
If
BLACK
wire
is not
grounded,
check
MASTER switch
ON. On
activating
the
aircraft electrical
wiring
from transducer
to
Pin
6
of indicator.
system,
the FT-101
will
flash
zero
(000.0)
fuel
flow.
3.
ERRATIC
INDICATIONS
Depress
and
hold
the
USED/TEST
button.
The FT-101
A.
Check
win’ng
for loose
connections.
will
display
the total fuel used
from
previous
Rights.
DO
B.
Check
win’ng
for
intermittent
shorts.
C. Check transducer
for
foreign
particles.
NOT
push
the
RESET
button!
On
starting
the
engine,
D.
If
all checks
OK,
replace
transducer.
the PT-101
will
display
fuel
flow
and continue
counting
4.
INACCURATE
READINGS
fuel used
up
to
999.9
gallons,
9999
pounds,
or
9999
A.
Check transducer
K-factor.
The
letter
liters
depending
on
the
internal
setting.
The Alcor TRU-
"L"."M","H",
or
"HH"
inscribed
after
the
serial
number.
FLOW 1
will
display
fuel
Row
total
fuel used.
B.
Remove
indicator
from
instrument
panel
and
73-31-04 TEST
FUNCTION
case.
Check switch
settings
and
correct
to
match
A
test
function
is
provided
in
the
FT-101,
so
the
pilot
transducer.
may
verify
that all
digits
are
functioning
prior
to
each
Right.
To
use
the
test
function,
depress
and hold
the
NOTE
USED/TEST
button
two
times
within
one
second and
Each switch
setting
changes
reading by
the
FT-101 will
display
all
eights
(888.8).
approximately
2
If
settings
are
OK,
replace
transducer.
73-31-03
OLDWILLWAYNE