Cockpit Reference Guide

190-00763-02 Rev. A
Garmin G1000 Pilot’s Guide for the Piper PA-46 Meridian
433
AUTOMATIC FLIGHT CONTROL SYSTEM
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EICAS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
DISENGAGEMENT
NOTE: Pressing the AP Key does not disengage the yaw damper.
The autopilot may be manually disengaged by pushing the AP DISC , GA , or MEPT ARM Switch, or the
AP KeyontheAFCSControlUnit.Manualdisengagementisindicatedbyave-secondashingyellow‘AP’
annunciation and a three-second autopilot disconnect aural alert. The AP DISC or MEPT ARM Switch may be
used to cancel the aural alert.
Figure 7-30 Manual Autopilot Disengagement
The YDKeyand AP DISC Switches can be used to disengage the yaw damper (the autopilot, if engaged, also
disengages when the AP DISCSwitchispressed).The‘YD’and‘AP’annunciationsturnyellowandashfor5
seconds upon disengagement.
Figure 7-31 Yaw Damper Disengagement
Automaticautopilotdisengagementisindicatedbyaashingredandwhite‘AP’annunciationandbythe
autopilot disconnect aural alert, which continue until acknowledged by pushing the AP DISC or MEPT ARM
Switch. Automatic autopilot disengagement occurs due to:
•Systemfailure
•Invalidsensordata
•Inabilitytocomputedefaultightdirectormodes(FDalsodisengagesautomatically)
Yawdamperdisengagementisindicatedbyave-secondashingyellow‘YD’annunciation.Automaticyaw
damper disengagement occurs when autopilot disengagement is caused by failure in a parameter also affecting
the yaw damper. This means the yaw damper can remain operational in some cases where the autopilot
automatically disengages. A localized failure in the yaw damper system or invalid sensor data also cause yaw
damper disengagement.
Figure 7-32 Automatic Autopilot and
Yaw Damper Disengagement