The issue with AF447 wasn&#x27;t really the disengagement of the autopilot; the crew knew the autopilot was off.<p>What they didn&#x27;t know was:<p>1. Exactly <i>why</i> the autopilot was having trouble, and<p>2. That the fly-by-wire&#x2F;flight envelope protection system had switched to &quot;alternate law&quot; mode which disabled stall protection.