B737 Transfer Bus Breaker
A colleague has been demonstrated this trick in the sim:
The Transfer Bus Breaker pops, and of course you are left with no Transfer Bus (1 or 2, doesn't matter) without any direct indication of the failure.
BUT if you deselect the related Generator from the Generator Bus, you recover the Transfer Bus!
I knew this trick could be used in case of a Transfer Bus failure, to force the transfer relay to switch to the opposite side, but the behaviour of all this with the breaker popped is quite amazing...
So what does the breaker control exactly?