About Mech. Backup all I know is
- it was demonstrated during training, and controllable to do a 360 level turn with careful inputs
- the book says it is a mode for unforeseen combination of faults, that might theoretically prevail for a short duration while pilots reset and re-engage some F/CTL computers
- the instructor told me, once factory test pilots managed to land it
Discussing Mech. Backup ON TOP of a dual hydraulic failure is triple useless. And there are plenty of "standard" abnormal situations and protocols worth studying.
Suggestion: For the training go and print a physical copy of FCTM and QRH. To be used in combination with electronic FCOM. Write your lesson notes directly into the appropriate chapters of FCTM and QRH.
The FCTM contains what the instructors will tell you and what you will not find in the FCOM later or elsewhere, like the cement between bricks. If marked as per above, this will be your most valued resource for the next 2-4 years. Once you master what the FCTM contains, you're on a TRI level knowledge-wise.
Wish you well and all good luck!
Last edited by FlightDetent; 6th Apr 2020 at 11:01.