Grunf-Only spent 6 months in Seattle (too bloody cold) and I am specifically refering to assembly fitters on the line (not design guys or even the maintenance guys who have to meet far higher standards than the factory bods). A case in point was the 747 which had a tailstrike (JAL?). The designed repair was fine. The product support mechanic (drawn from the factory) fitted one line of rivets along each side of the repair (not two as drawn by the design engineer). You know better than I that one line of rivets on the critical rear pressure bulkhead would never be entertained as an adequate repair...even a European factory cat would not fit that but tragically that repair was completed and signed off.