Basic autopilot holds selected flight parameters
Even relatively simple systems can maintain a heading or altitude. More advanced systems follow navigation routes and vertical profiles generated by flight-management computers.
Autothrottle or autothrust manages engine commands
On equipped aircraft, a separate system adjusts thrust to meet speed or power targets. Pilots monitor both thrust and flight path because the systems interact.
Automation modes must be understood precisely
Unexpected behavior often comes from the system being in a different mode than the crew assumed. Mode awareness is therefore a core part of airline training.
Takeoff is usually still manually flown
Airline pilots normally hand-fly the initial departure before engaging autopilot when appropriate. Procedures vary by aircraft, airline and conditions.
Automatic landing is possible only in specific conditions
Some aircraft and airports support autoland, but it requires compatible equipment, procedures and system status. Many normal landings are still flown manually even when the approach is highly automated.
Pilots disconnect automation when it stops helping
Weather, unusual clearances or system failures can make manual control more appropriate. Good automation use means knowing when to use it and when not to.
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