Cessna SkyHawk SP 172S NAV III 2005 Pilot Operating Handbook page 371

SECTION 9 - SUPPLEMENTS
SUPPLEMENT 3
NORMAL PROCEDURES
(Continued)
MODEL 172S NAV III
2. Glideslope Indicator - CENTERED. Make sure that the
ARM annunciator goes out and the GS annunciator stays""
on.
NOTE
The KAP 140 can lock on the glideslope from above
or below. Capturing the glideslope from above is
not recommended.
3. Airspeed - HOLD 100 KIAS minimum (recommended)
during approaches when the autopilot is engaged.
BACK COURSE (REV) MODE OPERATION
This mode provides reverse sensing for the autopilot navigation
course on Back Course-type Localizer approaches.
1. BARO - SET current local barometric pressure (altimeter).
2. CRS Pointer - SET the HSI course pointer to the ILS front
course inbound heading using the CRS knob on the PFD.
3. HOG bug - SET the HSI heading bug to the desired course
intercept heading.
4. HOG Button - PUSH to engage HOG mode. Make sure that
HOG is shown on the face of the autopilot.
5. REV Button - PUSH to arm the autopilot REV lock-on
function. Make sure that the autopilot is correctly engaged
from the annunciation on the autopilot:
a. If the HSI D-Bar is less than 2 to 3 dots from center, the
autopilot will go to REV mode. The REV annunciator
will be shown on the face of the autopilot.
b. If the HSI D-Bar is more than 2 to 3 dots from center,
the REV
ABM
annunciator will be shown on the face of
the autopilot. When the computed intercept point is
reached, the ARM annunciator will go off and lock on
(capture and track) will begin automatically. The REV
annunciator will stay on.
(Continued Next Page)
S3-42 U.S.
FAA APPROVED
172SPHAUS-S3-00