Textron Aviation Cessna 172S NAV III Skyhawk SP, Information Manual

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SECTION 9 - SUPPLEMENTS CESSNA
SUPPLEMENT 3 MODEL 172S NAV III
KAP 140 AUTOPILOT
U.S.
FAA APPROVED
NORMAL PROCEDURES
(Continued)
ALTITUDE PRESELECT MODE (ALTITUDE LOCK ON)
1. ALTITUDE SELECT - SET (target altitude using knob on KAP
140)
2. ALTITUDE ARM - PUSH the ARM button to set the altitude lock
on feature to the ON position (if needed). ALT ARM will show on
the face of the autopilot when altitude lock on is set to the ON
condition.
NOTE
•
Minor differences between the autopilot altitude
selection and the airplane altitude indication may be
seen after altitude lock on. This small difference is
generally due to autopilot system tolerances.
•
Use of altitude preselect (Lock On) mode is not
recommended for lock on at Minimum Descent Altitude
(MDA) during non-precision instrument approach
procedures due to the possibility of altitude overshoot.
Glideslope (GS) lock on during an ILS approach will
prevent lock on to a preselect altitude selection.
•
Use Vertical Speed (VS) mode as described previously
in CLIMB or DESCENT for altitude change.
(Continued Next Page)
172SPHAUS-S3-01
S3-28
For
Training
Purposes
Only