Curtis Scholl wrote:
Cla

Bearing strength is for the Connecting Points of all those items you
mentioned. And the engineer stopped the test before complete failure
from what I read.

Excessive deflection is not a failure mode unless the engineer states it
is out of spec. And again, what was the sandbag testing weight at which
the testing was stopped? And again, excessive deflection where? In the
skins? In the Spars? in the struts?

I disagree. Excessive deflection is a failure mode if it has
sufficient
adverse impact on function or safety, without regard to whether or
not any particular engineer realized it and said so.

That is more a criticism of the wording you used, than it is of the
implied question--How do we know the deflection was excessive?

(And what was it that deflected?)

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FF