Mike writes:

You mean the damage which was improperly repaired almost 10 years prior?

Yes. Why didn't he catch it on the preflight? You said that if you miss
damage on a preflight, you're not doing a preflight.

Do you even know what a bulkhead is?

Yes. Apparently the pilot of that aircraft didn't do a preflight inspection,
because you've indicated that the only way to miss damage is to not preflight
the aircraft.