manual reversion

== English == === Pronunciation === (UK) IPA(key): /ˈman.j(ʊ).əl ɹɪˈvəː.ʃən/ (US) IPA(key): /ˈmæn.j(əw).əl ɹɪˈvɚ.ʒən/, /ˈmæn.j(əw).əl ɹəˈvɚ.ʒən/ === Noun === manual reversion (uncountable) (aviation) The actuation via purely mechanical means (using cables and/or pushrods) of one or more control surfaces that are usually controlled by hydraulics.