If crew flee from hand-to-hand fighting their machine is abandoned. The victors must ignore it in order to pursue unless the player elects to restrain pursuit and passes the required Leadership test to do so.
Note that once separated from their machines crewmen become individual models. Consequently, the number of crewmen fleeing is used as the basis for Panic tests on friendly troops nearby. For purposes of rallying the original number of crewmen is considered to be the original size of the unit. Thus six crewmen fleeing from a battery of machines would cause a Panic test in friends nearby (as there are five or more) even though they may have abandoned only three machines.