Why do planes have the FL CH (=flight level change) button on the autopilot? I mean when you are at 2000 ft...

Question

..... and want to climb to 3000 ft, you are still on "altitude" and not on a FL change, so why is button not better called "altitude change"?

Answer 1

The manufacturer's preference after doing some research. Probably due to the fact that airliners fly at flight levels for the major portion of their operations.

Answer 2

by Thudley Member since:

January 26, 2008

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The manufacturer's preference after doing some research. Probably due to the fact that airliners fly at flight levels for the major portion of their operations.