Rotherham firm Eadon Consulting providing detailed design services for the operating mechanism as well as developing the hydraulic and electrical control systems.

BBC: New Broads river crossing planned

The disk severed all the plane's hydraulic lines, virtually cutting off all steering and speed control.

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All planes have batteries, but the Dreamliner needs especially powerful ones because its control systems are driven entirely by electrical signals in place of the hydraulic controls seen on earlier generations of jet.

BBC: Boeing 787: Dreamliner's lithium ion batteries probed

Substantially more complex than previous aircraft, the new plane required the pilot to attend to the four engines, a retractable landing gear, new wing flaps, electric trim tabs that needed adjustment to maintain control at different airspeeds, and constant-speed propellers whose pitch had to be regulated with hydraulic controls, among other features.

NEWYORKER: The Checklist