FLIGHT GUIDANCE COMPUTER FAILURE (RED BOXED FD DISPLAYED)
NOTE
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Selection of AHRS or DADC reversion on the coupled side during normal operation will result in Flight Guidance computer failure (FD).
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FD will annunciate with APPR captured and the loss of glideslope information.
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Vertical/Lateral modes with a yellow strike through line indicate the autopilot is in basic pitch and roll.
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FD will annunciate with LNAV captured and the loss of FMS information.
1. Selected autopilot modes - Reselect to achieve annunciation of PITCH and ROLL.
2. L and R FGC Circuit Breakers - CHECK.