For some reason my fix reminds me of one of those lessons learned we had in class in college. It was Japan Airlines flight 123.
Flight 123 was a milk run from one island to another in Japan. The 747 probably did it a couple times a day. The plane was configured into a cattle car configuration; short flight with as many passengers as possible.
So one day on a landing the plane had a tail strike. Thats when the pitch is too great and the plane drags its azz on the runway. It was a hard hit and the aft bulkhead of the pressure vessel was damaged. Boeing inspected it and their engineers came up with a patch and a crew did the repair but someone didn't follow the instructions and the faulty repair was hidden from inspection.
https://en.wikipedia.org/wiki/Japan_Air_Lines_Flight_123
The bad repair took years to fail but it did eventually fail, some 12318 flights later.
There was only one row of rivets holding the two bulkheads together.
When the bulkhead blew out, they lost the vertical stabilizer, all hydraulics and cabin pressurization. The pilots sorta flew the plane for another 40 minutes with only the throttles.
Supposably the guy who was in charge of the actual repair work was Japanese and was so remorseful that he committed suicide as a way of apology.