190-00709-05 Rev. D
Garmin G1000 Pilot’s Guide for the Socata TBM 850/900
531
AUTOMATIC FLIGHT CONTROL SYSTEM
DISENGAGEMENT
NOTE:
Pressing the
AP
Key does not disengage the yaw damper.
The autopilot may be manually disengaged by pushing the
AP DISC
,
GA
,
MERT
Switch,
MEPT ARM
Switch,
or the
AP
Key on the AFCS Control Unit. Manual disengagement is indicated by a five-second flashing 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 7-32 Manual Autopilot Disengagement
The
YD
Key,
MEYT
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 flash for 5 seconds upon disengagement.
Figure 7-33 Yaw Damper Disengagement
Automatic autopilot disengagement is indicated by a flashing 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
• Roll Trim input
• Stall warning
• Inability to compute default flight director modes
(FD also disengages automatically)
Yaw damper disengagement is indicated by a five-second flashing 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 7-34 Automatic Autopilot and
Yaw Damper Disengagement
