Vertical Speed Indicator - Cessna 172S Nav III Information Manual

^ CESSNA SECTION 7
MODEL 172S NAV III AIRPLANE AND SYSTEMS DESCRIPTION
FLIGHT INSTRUMENTS (Continued)
HORIZONTAL SITUATION INDICATOR (Continued)
WARNING
WHEN THE KAP 140 AUTOPILOT IS ENGAGED IN
NAV, APR OR REV OPERATING MODES, IF THE
HSI NAVIGATION SOURCE IS CHANGED FROM
GPS TO NAV1, AUTOMATICALLY OR MANUALLY
(USING THE CDI SOFTKEY), OR MANUALLY
FROM NAV2 TO GPS, THE CHANGE WILL
INTERRUPT THE NAVIGATION SIGNAL TO THE
AUTOPILOT AND WILL CAUSE THE AUTOPILOT
TO REVERT TO ROL MODE OPERATION. NO
WARNING CHIME OR PFD ANNUNCIATION WILL
BE PROVIDED. THE PREVIOUSLY-SELECTED
MODE SYMBOL SHOWN ON THE AUTOPILOT
DISPLAY WILL BE FLASHING TO SHOW THE
REVERSION TO ROL MODE OPERATION. IN ROL
MODE, THE AUTOPILOT WILL ONLY 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 SOFTKEY BEFORE
ENGAGING THE AUTOPILOT IN ANY OTHER
OPERATING MODE.
u_ VERTICAL SPEED INDICATOR
The vertical speed indicator (VSI) tape is found on the right side of
the altimeter display along upper right side of the GDU 1040
Primary Flight Display. The vertical speed pointer moves up and
down the fixed VSI scale and shows the rate of climb or descent in
digits inside the pointer. The VSI tape has a notch on the right
edge at the 0 feet/min index for reference. Rate of descent is shown
with a negative sign in front of the digits. Vertical speed must
exceed 100 feet/min in climb or descent before digits will appear in
the VSI pointer.
172SPHAUS-00 U.S. 7-19