Honestly, no one knows how long the economy can survive a lock down.
It is quite possible that martial law and rationing will become necessary if the crisis goes into May.
We are already seeing breakdowns in international civility because the distribution of critical protective gear was not controlled appropriately, given the circumstances.
In this context, it is a stretch to speculate on the prospects for individual air carriers or aerospace equipment makers. They are small potatoes relative to others such as the auto or energy or financial industries, their fates will get determined once the big sectors have been sorted.
It is however very plausible that there will be a dramatic fall in productivity, as supply chains get deglobalized to prevent cutoffs in the future. That does not bode well for commercial air travel.