You see that, some get those lovely dual batteries, on-demand APU, F/O nosewheel, funny COM selector thingy, audio transfer switch equipped machines only as pre-owned. Thus the expertise takes some time to develop. Indeed it is these aircraft with digital ELEC panels we are talking about?
Furthermore to what LEM describes we've learned that this light does not indicate a malfunction in progress so to speak but rather is a inidcation of a trouble whilst selecting main generators on-line. At first, is not a no-go item, wheteher you clear the indication or not makes no difference anyhow. Secondly, this indication comes up only and always with APU inop for various electrical transfers during the crosbleed start procedure. With proper APU bus supply, no tricks whatsoever.
Correct?
'evening...
FD