Just read the accident report on that 737 that crashed a couple of years ago. Attempted to takeoff with the flaps retracted. CB defect known to maintenance.
"the examination of the aural warning CB shows that the CB can not latch in due to wear on the latching mechanism. Such wear should be remedied by replacing the CB. This however was not done. Instead, for some reason, the maintenance of the previous owner/operator installed pull-out guard on the CB. " sic
What is a pullout guard?