I can't set the pressurization over FL280 for some reason.
@owlinflight my guess/assumption is that it's the maximum the bleed system can achieve. I do fly at up to 31,000 with it dialled into 28,000 and just make sure the cabin alt and DP are looking ok. <shrug>
@b3lt3r if cruising at or above F280. It's correct to set F280 on the Pressurisation controller.
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