manual reversion

UK/ˈman.j(ʊ).əl ɹɪˈvəː.ʃən/US/ˈmæn.j(əw).əl ɹɪˈvɚ.ʒən/US/ˈmæn.j(əw).əl ɹəˈvɚ.ʒən/

noun

The actuation via purely mechanical means (using cables and/or pushrods) of one or more control surfaces that are usually controlled by hydraulics.

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Meanings

nounmanual reversion (uncountable)
  1. uncountableaeronauticsThe actuation via purely mechanical means (using cables and/or pushrods) of one or more control surfaces that are usually controlled by hydraulics.

    In the event of a failure of both hydraulic systems A and B, the ailerons and elevators can be operated manually without hydraulic power (referred to as manual reversion). The rudder has no manual reversion capability but can be operated with the standby hydraulic system.

    1999, National Transportation Safety Board, “1.6.2 Boeing 737 Hydraulic System Information”, in Uncontrolled Descent And Collision With Terrain, USAir Flight 427, Boeing 737-300, N513AU, Near Aliquippa, Pennsylvania, September 8, 1994, archived from the original on 16 Jan 2021, page 16
Cite this entry
APA

manual reversion. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/manual%20reversion

MLA

“manual reversion.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/manual%20reversion. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “manual reversion,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/manual%20reversion.

Source: manual reversion on Wiktionary, CC BY-SA 4.0.