Originally Posted by
SASless
Nobody....if the engine controls have a mechanical backup system....which I assume would mean it has Engine Control Levers (ECL's") which the Crew could use to deal with the Overspeed(s) under "normal" emergency mode(s).
If they lost the Screens that display engine information....what back up system is available to them for that information?
Or would they be reduced to using their ears to assess the Nr and engine speeds?
SOS.... The engine controls do have a mechanical backup system. ECL's through a cable to the FMM. ECL's can be beeped or (very carefully!) moved by hand. ECL's should be exercised daily by maintenance to prevent binding. If the cable binds a shear pin breaks and you lose backup.
You would need to lose all four screens to not have any engine info. Power supply for the screens is separated.
Leo sales brochure is misleading. Engine is NOT FADEC. It is single channel DEC with cable operated backup. But nobody knows what DEC is, so they just call it FADEC.