As BOAC says, follow the QRH. If circumstances make it obvious that following the QRH may not be the safest thing to do, then do the safest thing. That's the answer.
Not a bad answer, but most of the discussion examines how do you decide what is the safest course and when to vary from the QRH.
If we don't have these discussions than you might be a free range cowboy and flunk your next sim test
