Yes poorly repaired this repair calles for two rows of a particular type of rivet . The repair, as carried out consisted of one row with the wrong type of rivets. The later is hard to see unless you look very carefully ,but missing one row of rivets?Not that poorly repaired. But the repair did not follow Boeing procedure. The repair lasted some from 1978 to 1985 . Boeing calculated that this incorrect installation would fail after approximately 10,000 pressurizations; the aircraft accomplished 12,318 (cycles) successful flights from the time that the faulty repair was made to when the crash happened. I remember seeing a show on it and Boeing told the airline to inspect the repair after so many cycles. JAL did not follow up on that. IIRC the chief engineer for JAL committed suicide after the accident.
docfl
Frankly this is a series of human errors which were not discovered because the correct procedures were ignored.
I think this fails the test of impact because it taught the industry nothing it didnt already know