Our a/c had a problem with electrical power isolation on 3 A/P coupled approachs if L A/P was selected first. Procedure was 'do not select L A/P first for autolands'. So everyone just got used to selecting the C A/P.
That problem no longer exists. Either it's been fixed, didn't exist in the first place, or the powers that be realize it doesn't matter. So we use any A/P we want.
At what point is using the C A/P because of switching logic to the trim getting so nitnoid to the point of being ridiculous?
We do the same with switching 121.5 to the #1 radio for oceanic crossings. Never mind that it was already on radio #2 so there's radio frequency and mike selector switching being done needlessly, 2X, to satisfy some decision maker's fear that if the one in a billion total electrical failure occurs in oceanic waters the crew would save about 5 secs by already having 121.5 preset on the remaining power.
