Originally Posted by 2StgTurbine

I've been on a few fleets at Delta over the years, and it seems most stopped pulling the red circuit breakers, but I come across it a lot on the 737. When I first started, Vol 1 said to pull them if the airplane was going to sit for more than 2 hours. But then during OE, the check airman said we don't do that at a hub since MX comes out and doesn't want to power up every plane just to see the oil level. Then there was an update on the fleet that even removed the 2 hour rule and just said to pull them if the plane will be sitting for a long time.

A few years go by, a few more fleets, and now I'm on the 737 and I see it every trip. What's really strange is I see crews go through the entire shutdown checklist in the middle of the day in base AND pull the breakers. Why? Can anyone find an actual reference to where we need to be doing this? And what are other fleets doing?