Originally Posted by
hoss183
In fact its even more clever than that. When visiting BAs maintenance facility, i was shown what the do on a/c during a C check.
The blades are taken out and inspected an weighed, thats fed into a computer and it defines the optimal position for each blade being put back to achieve the best balance.
The procedure for removal of each blade involves sliding the blade root out of its disc mate. Loose enough to slide means play. Play means wear, likely unique to each paired joint.
I’d question the advisability of changing matched pairs in the interest of balancing the disc?