Originally Posted by
Citation2
Should you need to use the fuel from the failed side , you need to apply the fuel imbalance procedure.
By simply opening the X-feed, you might aggravate the fuel imbalance , and end up dry on the live engine side.
Fuel pumps have no clue about « the live side or failed side »
Fuel Pumps do not necessarily have the same delivery pressure , the best pump wins.
For that reason switching off the fuel pumps on the lighter tank is a must as dictated by the fuel imbalance checklist.
Provided You have assessed there is no fuel leak there is no issue with opening the crossfeed valve thus allowing all wing tanks fuel to be used on the live engine and avoid an imbalance and/or fuel starvation.