Garmin G1000 Socata TBM 850 User Manual download pdf (Page 390)

Garmin G1000 Pilot’s Guide for the Socata TBM 850

190-00709-00 Rev. A

7-6

AUTOMATIC FLIGHT CONTROL SYSTEM

FLIGHT DIRECTOR MODES

Flight director modes are normally selected independently for the pitch and roll axes. Unless otherwise

speciﬁed, all mode keys are alternate action (i.e., press on, press off). In the absence of speciﬁc mode selection,

the ﬂight director reverts to the default pitch and/or roll mode(s). Mode keys on the AFCS controller are

accompanied by annunciator lights (Figure 7-1) which are illuminated when their respective modes are armed

or active.

Armed modes are annunciated in white and active in green in the AFCS Status Box. Under normal operation,

when the control for the active ﬂight director mode is pressed, the ﬂight director reverts to the default mode(s)

for the axis(es). Automatic transition from armed to active mode is indicated by the white armed mode

annunciation moving to the green active mode ﬁeld and ﬂashing for 10 seconds.

If the information required to compute a ﬂight director mode becomes invalid or unavailable, the ﬂight

director automatically reverts to the default mode for that axis. A ﬂashing yellow mode annunciation and

annunciator light indicate loss of sensor (ADC) or navigation data (VOR, LOC, GPS, VNV, WAAS) required to

compute commands. When such a loss occurs, the system automatically begins to roll the wings level (enters

Roll Hold Mode) or maintain the pitch angle (enters Pitch Hold Mode), depending on the affected axis. The

ﬂashing annunciation stops when the affected mode key is pressed or another mode for the axis is selected. If

after 10 seconds no action is taken, the ﬂashing annunciation stops.

Figure 7-3 Loss of VOR Signal

The ﬂight director is automatically disabled if the attitude information required to compute the default ﬂight

director modes becomes invalid or unavailable.

SWITCHING FLIGHT DIRECTORS

The GFC 700 in the Socata TBM 850 has two ﬂight directors, each operating within an IAU. Only one ﬂight

director is active (selected) at a time. Flight directors may be switched by pressing the XFR Key. Both PFDs

display the selected ﬂight director, indicated by an arrow pointing toward either the pilot or copilot side, in the

center of the AFCS Status Box. The annunciator light arrow for the selected ﬂight director is also illuminated

beside the XFR Key. When the ﬂight directors are switched, the vertical and lateral modes revert to default.

Figure 7-4 Flight Director Selection Indications

Pilot-side Flight Director

Copilot-side Flight Director

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Garmin G1000 Socata TBM 850 User Manual Page 390