@PJ2... "The only other possibility (only because it isn't clear if the AP is lost until landing) is the Abnormal Attitude Law, which if set pitch and/or bank angle values are exceeded, the laws revert to, in roll - yaw alternate, and in pitch - an adapted Nz law, without autotrim."
I probably sound impatient or worse... I have read here that AP is lost until ground maintenance. Are you saying it is not yet established? From the report, with the new addition of the Captain's comment re: "Wait, the autopilot.....(sound of selector switch, CAM)" which he spoke very late in the descent, we do not know if the a/p was merely left on, or if the PF or PNF selected it, do we?
If the a/p is locked out after AL, it is probably not important, but if the a/p was reselected, the AD definitely says that the autopilot can come back on line with rectified NAV ADR disagree? Of course this would interest the investigation....or it's discussion....