I-C,
you must have missed the part when AW took over full control, they had to rebaseline the design and test program since the previous "owner" had let it go dormant to attend to more pressing existential programs? My guess is that included all additional A/C like #3&4.
WRT to the incident, maybe there is no story? It sure sounds like a developmental issue that many programs go or have gone through. They simply found a "test point" and resolved the issue. Why so suspicious of the 609?