Dave W wrote:On a related subject:
Do people switch off the G5 for engine startup and shutdown? The manual doesn't advise one way or the other.
I was taught "avionics off" for startup and shutdown, and told that is why some aircraft have split Master switches. I have assumed this to be still valid for modern avionics but a couple of conversations recently have suggested it isn't what everybody does with modern kit.
Dave, the answer is in DD160, all equipment available now must be able to cope with the power transients from start up and shut down. The 'power spikes' at start up that ppl instructors talk about don't exist, they are brown outs rather than spikes, equipment can now cope. The need to keep the alternator off while cranking may have been of (a little) benefit 50 years ago but no longer. Treat the split master as one switch. I don't have a separate alternator switch in my aeroplane. I also don't have an avionics master.
Switch stuff off before you press the starter if it makes you feel better, but there is no technical reason for it.