What electrical source powers LGCIU1?
A320.
I thought LGCIU1 was powered by the DC ESS BUS but the Abnormal and Emergency Procedures does not list LGCIU1 under the Inop Sys for a DC ESS BUS Fault. In the event of a DC BUS 2 fault you lose LGCIU2 and if you have both these faults at the same time a gravity gear extension is required, presumably because of the loss of both LGCIUs, implying the DC ESS is the source powering LGCIU1, I don’t imagine it being on the SHED. Can anyone confirm this, it’s a shame the old FCOM 1-4 used to list quite clearly and I don’t have a copy.