Normally the OPT ALT is approx. 1000 ft. below MAX ALT. When attempting to reach a cruising level close to the MAX ALT keep the OPT ALT in mind. (e.g. when MAX ALT is 410 it will remain 410 for the remainder of the flight, however the OPT ALT will gradually approach MAX ALT as well). Flight envelope protection is always good at OPT ALT.
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