PJ2 et al,
Reading a schematic of the Flight/Protection Laws on its own can be a little confusing - or that's my feeling. For that reason, I have conferred with Andy Tracy regarding his well presented description followed by a table showing the protections, which is at:-
http://www.andytracy.net/files/27FLTCTL.doc
The same document has been produced in HTML form, and Andy has said that he is happy for anyone to make use of it if it helps them in understanding the complexities of Airbus flight control.
Andy Tracy ...
That particular document was written as I did my original Airbus course and
variously amended over the years. Not much has changed recently so the file
is not much changed.
From my perspective, other than a global discussion on what optimal
fly-by-wire protections might be, the only open questions with the Airbus
system is a clearer understanding of ALTN law. Reading into Emerg Procs
appears to show that ALTN Law is actually a variety of things, not the simple
305kt or 330kt and few still grasp the implications of feedback gains being
set to the VMO/MMO point of any flap setting.
So, the document of reference that Andy Tracy produced has been converted into HTML and presented in an easily readable format, and can be found at:-
A340 - A330 Control: Flight & Laws
Hopefully the description and the tabulated list of protections may help with this discussion. It is acknowledged that it is not the document recognised by the regulatory authorities, but it attempts to make sense of something that even confuses those who fly the aircraft.
mm43