Garmin Flight Deck 100 Marine Instruments User Manual


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190-00728-04 Rev. A
Embraer Prodigy
®
Flight Deck 100 Pilot’s Guide
479
AUTOMATIC FLIGHT CONTROL SYSTEM
DISENGAGING THE AUTOPILOT AND YAW DAMPER
NOTE: Pressing the AP Key does not disengage the yaw damper.
Manualautopilotdisengagementisindicatedbyave-secondashingred‘AP’annunciationandanautopilot
disconnectauralalert,“Autopilot”.Theautopilotismanuallydisengagedbypushingthe
AP
Key on the AFCS
Control Unit, the
TO
/GA Switch, or the
AP DISC
Switch(alsodisengagestheyawdamper,ifengaged).Pressing
the YDKeydisengagestheyawdamperindependentlyoftheautopilot.The‘YD’annunciationisremovedupon
disengagement.
After manual disengagement, theautopilot disconnect aural alert and ashing‘AP’ annunciation may be
cancelled by pushing the
AP DISC
Switch.
Figure 7-32 Manual Autopilot Disengagement
Automaticautopilotdisengagementisindicatedbyaashingredandwhite‘AP’annunciationandtheautopilot
disconnect aural alert, which continue until acknowledged by pushing the AP DISC Switch. Automatic
autopilot disengagement occurs due to:
•Systemfailure
•Invalidsensordata
•Stallwarning(YDalsodisengages)
•Inabilitytocomputedefaultightdirectormodes
(FDalsodisengagesautomatically)
•Backuppitchtrimchannelselection
•PushingtheMEPTswitches
Automaticyawdamperdisengagementisindicatedbyave-secondashingyellow‘YD’annunciation.The
yaw damper automatically disengages 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 7-33 Automatic Autopilot and
Yaw Damper Disengagement
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