In this case one had to remove the daughter board and chip as one item. The problem there is there were numerous tiny R's and C's on that board and to us olduns, heating stuff like that is beyond wicked. ;-)
Given I once held one of the very first Darlington Pair transistors which had to be soldered soooo carefully, I of course never believed there would be devices measured in billions that could be raised to those temperatures. In fact, I'm not sure I believe it now.