Only one clarification for Capt Pit Bull.
Here at my current employer, the captain signs for the aircraft, but this is not for the work the engineer does on it, far from it!
He signs for the responsibility for the aircraft. Up to that point, from whence the previous crew signed the incoming log book, we, the lowly serfs actually had the onerous responsibility.
Oh, the number of times I have heard the whinging about this and that that did not work, and all I say to the Captain is :
Just write in the log that you are not willing to take the aircraft and I will happily sit it on the ground and fix it for you.
Only ever had one guy do it, and he was right to as well, but as an engineer, I could not arbitrarily ground it, even if I was not altogether happy with what the previous station had done. Even god has limits it seems.