Cessna SkyHawk SP 172S NAV III 2005 Pilot Operating Handbook page 370

CESSNA
MODEL 172S NAV III
SECTION 9 - SUPPLEMENTS
SUPPLEMENT 3
r
r
NORMAL PROCEDURES
(Continued)
WARNING
WHEN THE KAP 140 AUTOPILOT IS ENGAGED IN
NAV, APR OR REV OPERATING MODE, IF THE
HSI NAVIGATION SOURCE IS CHANGED FROM
GPS TO NAV1, AUTOMATICALLV OR MANUALLV
(USING THE COl SOFTKEV), OR MANUALLV
FROM NAV2 TO GPS, THE CHANGE WILL
INTERRUPT THE SIGNAL TO THE AUTOPILOT
AND CAUSE THE AUTOPILOT TO GO BACK TO
ROL MODE OPERATION. NO WARNING CHIME
OR PFD ANNUNCIATION WILL BE SUPPLIED.
THE PREVIOUSLV-SELECTED MODE SYMBOL
SHOWN ON THE FACE OF THE AUTOPILOT WILL
FLASH TO SHOW THE CHANGE TO ROL MODE
OPERATION. IN ROL MODE, THE AUTOPILOT
WILL ONLV KEEP THE WINGS LEVEL AND WILL
NOT CORRECT THE AIRPLANE HEADING OR
COURSE. SET THE HDG BUG TO THE CORRECT
HEADING AND SELECT THE CORRECT
NAVIGATION SOURCE ON THE HSI USING THE
CDI SOFTKEV BEFORE ENGAGING THE
AUTOPILOT IN ANV OTHER OPERATING MODE.
6. Airspeed - HOLD 100 KIAS minimum (recommended)
during approaches when the autopilot is engaged.
GLiDESLOPE ENGAGEMENT AND LOCK-ON
1. APR Mode - ENGAGED. Make sure that GSARM is shown
on the face of the autopilot.
NOTE
The glideslope cannot lock-on when the autopilot is
engaged in NAV or REV modes. Engaged in APR
mode, with NAV 1 or NAV 2 set to the correct ILS
frequency, and shown as the related HSI navigation
source, the glideslope becomes armed at localizer
lock-on.
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FAA APPROVED
172SPHAUS-S3-00
U.S. S3-41