Cessna 172S Pilot Operating Handbook page 159

C ESSNA
MOD E L 1 72S
Altitude preselect captures are not recommended on
non precision approaches to capture the M DA.
coupling will preclude a preselect altitude capture on an
I LS.
b. Altitude (AL T) Hold Button :
1 ) AL T Hold Selector Button
annunciator ON .
altitude.
It is recommended by the FAA (ACOO-24B) to use basic
" PITCH ATTITUD E HOLD" mode duri ng operation in severe
tu rbulence. However, since this autopilot does not use the
attitude gyro as a pitch reference, it is recommended that
the autopilot be disconnected and that the airplane be flown
by hand in severe turbulence.
c. Changing altitudes :
1 ) Using
changes less than 1 00 ft. )
a) VERTICAL SPEED Control -- PRESS and HOLD
either the U P or DN button. Vertical Speed will seek
a rate of change of about 500 fpm .
b) VERTICAL SPEED Control
desired altitude is reached.
maintain the desired altitude.
As an alternative , a series of quick momentary presses on
the UP or ON button will program either an increase or
decrease of the altitude reference, 20 feet each time the
button is pressed.
Original Issue
S U P P L E M E NT 1 5 - FAA APPROVED
NOTE
Autopilot will maintai n the selected
NOTE
Vertical Speed
NOTE
S ECTION 9 S U PPLEM ENTS
-
Glideslope
PRESS. Note AL T hold
- -
( Recommended
RELEASE
- -
The autopilot will
for altitude
when
S 1 5-25