Belton Cooper in his book said unless it was shot through the turret ring, completely burned out, or blown to bits, he and his boys could put it back in service.
Another problem of definition.
Temporarily gone, or all the way gone?
Is a plane that makes it back to base and then scrapped considered shot down? Does the pilot who inflicted the damage get the credit? What category do the pencil pushers put this one in?
Where do you draw the line?

During the Schweinfurt raid 60 planes were shot down, but 87 others never flew again for a plethora of different reasons.

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