Airbus Back Up Navigation
I'm in doubt if in the event of a double FMGS failure could we continue flying RNAV5 airspace using Back Up navigation supported by GPS. Has anybody any idea about?
Accordingly with the procedures in the Special Operations of the FCOM we need at least one FMGC to enter in RNAV5 airspace but it doesn't say if you can remain inside if such a failure happens once you have already enter. Thank you.