Why are the standard parts (actuator rod, bearing, bush or fastener) not considered as critical DDPs?
How does the inspection routines are derived for those standard parts?
The Manufacturer would have conducted the fatigue test. Unless those have super fatigue life, why aren't those parts...
From fatigue aspect, is it possible that scalloping the components at free edges would be more critical than non-scalloped component?
Assume, minimum edge distances of holes are maintained, it is well designed that no stress concentration interactions between fastener holes and scalloped portion...
When we do Damage Tolerance Analysis for fuselage skin panel cut-outs, We usually assume a primary flaw (0.05") on one side of cut-out and continuing damage on other side of cut-out (e.g. 0.005"). When we grow the crack, at some point of time, cracks on both sides of the cut-out are assumed to...
