WILEY.
My response was to your enquiry about an electrical power loss "after takeoff".
Now, "after start" is a different matter. But I don't recall ever being caught by it.
It is my recollection that in the Blue Team, we started with gen switches on. At this point we would have the square blue APU pwr available light on along with the two round button blue lights on indicating APU gen supplying power. On spin up engine gennies would take over and the round blue button lights would go out as the power supply automatically transferred. Transfer was accompaied by a "clunk" but from memory there was no significant loss of lights etc. After start flows
REQUIRED a check that the round APU supplying power lights be out
BEFORE switching off the APU. Simple procedure which if followed would ensure no black surprise.
We then had a procedure on the first flight of the day to check the AC Crosstie. This would entail switching off one gennie and observing the auto switch over and no lockout. Recollection is that this gave a momentary flicker of various lights and systems, twice. Once when you switched the gennie off and another when you switched it back on. Perhaps this is what you are referring to.
SHERM Sorry, I didn't catch your subtle inflection. Great idea till you look a bit deeper. Must confess I preferred the other method of getting the CofG aft. Closing off the forward toilets to get two or three 100+ kg nordics to stand around the aft dunnies waiting to drain the spuds.
Memories
Maui.