Sudden loss due to crash = unlikely (fortunately) Grounded for unknown timespan due to some kind of severe damage = does happen from time to time (good thing,

Sudden loss due to crash = unlikely (fortunately) Grounded for unknown timespan due to some kind of severe damage = does happen from time to time (good thing, because otherwise, crashes would become more likely...) Since the effect on the logistics chain is identical (at least apart from that single shipment in question), you just use the contingency plan for the latter when the former happens. And for the latter, you MUST have a plan.