Textron Cessna 172R - Page 446

SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
15
-
FAA
APPROVED
CESSNA
MODEL
172R
NOTE
The
following
procedures
apply
to
airplane
serials
I
17280831
thru
17281118
incorporating Honeywell
Service
Bulletin
KC140-M1,
and serials
17281119
and
on.
The
following
voice
messages
will
be annunciated
as
conditions
warrant:
1.
"TRIM
IN
MOTION"
-
Elevator
trim
running
for
more
than
5
seconds,
message
repeats
every
5
seconds.
2.
"CHECK PITCH
TRIM"
-
An
out
of
trim
condition
has
existed
for
approximately
20
seconds,
take
immediate
corrective
action.
a.
Airplane
Control
Wheel
--
GRASP
FIRMLY
and
regain
aircraft
control.
b.
A/P
DISC/TRIM
INT
Switch
-
PRESS
and
throughout
recovery.
c.
AIRCRAFT
--
RE-TRIM
Manually
as
Needed.
HOLD
d.
AUTO PILOT Circuit
Breaker
--
PULL.
SECTION
4
NORMAL
PROCEDURES
A.
PREFLIGHT
(PERFORM
PRIOR TO
EACH
FLIGHT):
1.
AVIONICS MASTER
-
ON.
POWER
APPLICATION
AND
SELF TEST
--
A
self
test
is
performed
upon power
application
to
the
computer.
This
test
is
a
sequence
of
internal
checks that
validate
proper
system
operation
prior
to
allowing
normal
system
operation.
The
sequence
is indicated
by
"PFT"
with
an
increasing
number
for
the
sequence
steps.
Successful
completion
of
self
test
is
identified
by
all
display
segments
being
illuminated
(Display
Test),
external
"Pitch
Trim"
(A/C
System
Annunciator
Panel)
being
illuminated,
and the disconnect
tone
sounding.
S15-20
Revision
2
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