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Boeing MD-11 |
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 The Automatic Flight System (AFS) is an integral part of the automatic and manual control system of the aircraft. Manual override of the automatic flight controls and autothrottle is always available.
The AFS consists of two Flight Control Computers (FCCs) with integrated autopilots (AP), Flight Directors (FD), autothrottle (AT) and engine trim controls. The AFS features fail-operational Category IIIb autoland through ground roll out and integrated windshear detection/warning with AP, FD and ATS guidance escape capability.
The AFS incorporates speed and flight path protective features that automatically override the selected speed and/or flight path commands to prevent overspeed or underspeed.
Advanced Features:
 | | Longitudinal Stability Augmentation System (LSAS) with series elevator actuation | | | Speed Envelope Limiting (autothrottle and LSAS) | | | Automatic Pitch Trim (autopilot and LSAS) | | | Yaw Damping/Turn Coordination | | | Elevator Load Feel Control | | | Flap Limiting | | | Automatic Ground Spoiler Control | | | Altitude Alert Warning (visual and aural) | | | Stall Warning with Stick Shaker and AutoSlat Extension | | | Data for EIS Flight Mode Annunciation | | | Control Wheel Steering (CWS) with Roll Attitude Hold (while AP is engaged is an option) |
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