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A functional autopilot in solid IMC takes work off your shoulders. Here are 10 tips to use it well.
If you're in "NAV Mode" and were just given a heading vector, avoid making the mistake of dialing in your new heading first. If you simply click "HDG Mode" after tuning your assigned heading, the airplane will initiate a turn in the shortest direction to reach that heading.
This can create an issue if ATC has specifically cleared you for a "right" or "left" turn. Make a habit of syncing the heading bug, then engaging heading mode, then turning in the direction of your assigned heading.
If you climb using vertical speed mode, the autopilot will do its best to maintain the selected foot per minute climb you've set. If you don't manage your power correctly, or become distracted, the autopilot could allow the aircraft to begin flying dangerously slow as it tries to maintain the vertical speed setting you've requested.
A better alternative is to climb in "speed mode," which will give you the best rate of climb for an airspeed you've selected. Introducing a higher power setting will result in a steeper climb.
Anytime you select a new auto flight mode, you should say it out loud to yourself, or announce it to your crew members. It's an important way to make sure everyone in the cockpit is aware of how or where the plane will fly.
Verbalizing your settings is also a great way to second guess your own decision-making by saying "is that really the flight mode I wanted?"
When you're "cleared for the approach," your mind should go to arming some kind of autopilot approach mode. If it's an ILS or LPV, you'll likely arm "APR Mode" right away. For other approaches like LOC, LNAV, LNAV/VNAV, etc., you may need to activate a variety of modes like "NAV" or "VNAV."
If you've ever ridden in the jumpseat with a professional flight crew, you'll notice that pilots constantly sync their heading mode with the course they're flying.
If you have to make a sudden heading change or begin receiving vectors, having your heading synced ensures you don't begin turning in the wrong direction once you click "HDG Mode."
Are you able to climb at least 500 fpm? If you can't, you need to let ATC know. It's easy to leave vertical speed out of your scan pattern if you let the autopilot take over in IMC, especially while you're busy managing charts, running checklists, or completing briefings.
Autopilot systems aren't perfect. If you're ever left scratching your head, you may want to disconnect the autopilot and fly the airplane by hand until you're positive it's responding to your inputs correctly.
ATC may clear you to track the localizer course before you're given an approach clearance. If you haven't been cleared to descend, make sure a descent mode is not active or armed.
Autopilots are a great way to reduce your task load in the cockpit during challenging weather conditions. That shouldn't mean you become fully reliant on its use. Occasionally, you should practice hand-flying full departures, arrivals, and approaches in IMC.
Many autopilot systems automatically revert to pitch or roll mode when you've missed intercepting an altitude or course. These modes are dangerous because they may initially appear to hold your altitude, heading, or course. In reality, the autopilot is just holding your current pitch or roll.
Get out of those modes quickly and activate a form of lateral navigation, vertical navigation, or altitude capture.
What other tips do you have for flying in IMC with an autopilot? Tell us in the comments below.
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