@LEVEL600
both hot bus 1 and dc ess. bus probably, I agree with your idea...
Ok, so the only "simple" explanation I could think of for a/p disengage + alt. law + 3 mins of ARIDU + ISIS fail messages would be a fault with pitot-static system (Aero Peru anyone? Not saying they were blocked on take off, but could've iced up).
PRIM/SEC 1 must've been still running off DC ESS and not HOT BAT as ACARS was TXing, correct? If it was a short on DC ESS that probably would take out more than just PRIM/SEC. I also presume that a lightning strike to a wing would've knocked some core censors out like fuel flow, etc, which would've been reported via ACARS?..
Just trying to fit theory to facts, not the other way around...