Before that wonderful retirement day, and at least between same-day segments, as soon as we we sure we were staying on the ground, the RADAR went off. Everything else stayed ON or in STBY. Right or wrong, I do not know, but it was SOP. Before strangling the APU after the day's last segment - meaning a multi-hour/overnight sit, nearly all individual devices were set to OFF. Again, it was SOP for our AB fleet.
(If anyone cares, my last few years were on AB, I hated every minute I did it for the money. Does that make me a prostitute? AB does not build airplanes and teach pilots how to fly them. They build 'systems' and hope to hell that former pilots can learn to operate them. I know, the debate is endless. IMO the A320, A330 and A340 series are some of the worst 'airplanes' ever made. Well aware that some absolutely love them, I never did. I took the money and felt a professional obligation to master my machine - and I did. That does not mean that I enjoyed those years and I did not.
These days, a well-dressed, mid-60s Mooney pleases me frequently. Why? It is mostly about that two-handed, push-pull thing sort of centered between my legs and pedals with a purpose.