Cessna 172R, Operating Handbook

Page: 419 / 500

CESSNA
MODEL 172R
SECTION
9
- SUPPLEMENTS
SUPPLEMENT
9 -
FAA APPROVED
r
SUPPLEMENT
DIGITAL CLOCK/O.A.T.
SECTION 1
GENERAL
The Davtron Model 803 digital clock combines the features
of
a
clock, outside air temperature gauge (O.A.T.) and voltmeter in a
single unit. The unit is designed
for
ease
of operation with the use
of
three buttons. The upper button
is
used
to
control sequencing
between
temperature and voltage. The lower two
buttons control
reading and timing functions related
to
the digital clock.
Temperature and
voltage functions
are displayed in the upper
portion
of the unit’s LCD window, and clock/timing functions are
displayed in the lower portion of the unit’s LCD window.
A
!
The digital display
features an internal light (back light)
to
ensure good visibility under low
cabin lighting conditions and
at
night. The intensity of the back light is controlled
by the
PANEL
LT
rheostat. In addition, the display incorporates a
test function which
allows checking that all
elements of
the display are
operating.
There is no change
to
the airplane limitations when the digital
There is no
change
to
the airplane emergency procedures when
the digital clock/O.A.T.
is
installed.
SECTION 2
LIMITATIONS
clock/O.A.T. is installed.
SECTION 3
EMERGENCY PROCEDURES
Feb 28/97 S9-3