So the boost pump was only masking the problem (incorrectly assumed to be the engine driven pump) for an unknown period of time. The engine probably would have failed again once the pressure of the two pumps combined wasn’t enough. That’s what I mean by treating any abnormal situation as suspect. Always play it safe if there is any doubt -
especially if you have passengers.
Disclaimer: My answer is aimed at your questioning whether it is safe and is general in nature. I don’t know much about the baron specifically! .